CN102932290B - LTE system AF panel method of reseptance and device - Google Patents

Abstract

The invention discloses a kind of LTE system AF panel method of reseptance and device.Carry out channel estimation based on local pilot signal docking collection of letters Y, obtain channel response H, and calculate the average covariance matrices R(b of each Resource Block described according to channel response H)；According to the described average covariance matrices R(b of Resource Block each described) calculate, obtain AF panel compensating parameter W(b of each described Resource Block corresponding) and variance NoiseVar(b of equivalence white Gaussian noise)；Determine signal place Resource Block b to be compensated in described reception signal Y, according to AF panel compensating parameter W(b that described signal place to be compensated Resource Block is corresponding) and described channel response H carry out signal compensation, the reception signal Y ' after being compensated.Based on said method and device, it is possible to obtain average covariance matrices R(b more accurately), it is ensured that the accuracy of AF panel reception and the performance of whole communication network.

Description

LTE system AF panel method of reseptance and device

Technical field

The present invention relates to wireless communication technology field, in particular, relate to a kind of LTE(Long Term Evolution system, long evolving system) system interference suppression method of reseptance and device.

Background technology

3GPP LTE project is the evolution of 3G, and 3GPP LTE is a transition between 3G and 4G technology, is currently by extensively The wireless communication technology of general accreditation.

LTE system uses OFDM (Orthogonal Frequency Division Multiple, OFDM) Access technology and in the communication network that builds, the information of user is carried on mutually orthogonal different carrier wave, it is possible to have Effect antagonism is with the interference between the user of community.But neighbor cell interference and other system interference can bring under identical networking The strongest co-channel interference.Co-channel interference can affect the service quality of Cell Edge User.

In prior art, in order to Cochannel interference, for being equipped with the terminal of many reception antennas, interference can be used Suppression merges algorithm (Interference Rejection Combining, IRC).

IRC is a kind of transmitter or the method for receiver signal process, can improve the signal in LTE system and receive matter Amount.At the downlink of base station, after the signal received reception antenna by IRC carries out AF panel merging, then output is arrived Equalizer carries out channel-decoding.

As a example by two reception antennas, the signal received can be expressed as:

$y=\left[\begin{array}{c}{y}_0\\ y_1\end{array}\right]=H*x+m---\left(1\right)$

In the case of glitch-free, m is white Gaussian noise；In cases of a disturbance, m is that (i.e. interference adds coloured noise White Gaussian noise), its covariance matrix is R；X is for sending signal, and when launching antenna and being two, the dimension of x is 2 × 1, when sending out Penetrating antenna when being single, the dimension of x is 1 × 1；H is channel response matrix, when launching antenna and being two, the dimension of H is 2 × 2, when launching antenna and being single, the dimension of H is 2 × 1.

But, existing equalizer all premised on white noise condition carry out channel-decoding.Prior art utilizes IRC carries out covariance matrix R obtained by AF panel reception estimation and is inaccurate, and is likely to result in the signal to receiving and carries out IRC After process, not only can not eliminate interference, more even worse than before processing on the contrary.Therefore, in prior art, utilize IRC to carry out AF panel and connect Receiving, accuracy is low, can affect the performance of whole communication network time serious.

Summary of the invention

In view of this, the invention provides a kind of LTE system AF panel method of reseptance and device, to overcome prior art In utilize IRC to carry out AF panel reception, accuracy is low, the problem that can affect the performance of whole communication network time serious.

For achieving the above object, the present invention provides following technical scheme:

A kind of LTE system AF panel method of reseptance, including:

Carry out channel estimation based on local pilot signal docking collection of letters Y, obtain channel response H, and calculate described reception The average covariance matrices R(b of each Resource Block of signal Y place)；

According to the described average covariance matrices R(b of Resource Block each described) calculate, obtain each described money corresponding AF panel compensating parameter W(b of source block) and variance NoiseVar(b of equivalence white Gaussian noise)；

Determine signal place to be compensated Resource Block in described reception signal Y, according to described signal place to be compensated Resource Block Corresponding AF panel compensating parameter W(b) and described channel response H carry out signal compensation, the reception signal Y ' after being compensated (b).

Preferably, after the reception signal after being compensated, also include:

Choose variance NoiseVar(b of equivalent white Gaussian noise corresponding to described signal place to be compensated Resource Block), right Reception signal Y'(b after described compensation) carry out equilibrium treatment.

It is preferably based on local pilot signal docking collection of letters Y and carries out channel estimation, obtain channel response H, and calculate institute State the average covariance matrices R(b receiving signal Y place each Resource Block) process include:

Carry out channel estimation based on local pilot signal docking collection of letters Y, obtain channel response H；

The covariance matrix of each Resource Block is calculated according to described channel response H；

Judge that the distance between the covariance matrix of each described Resource Block and the covariance matrix of N number of Adjacent resource block is No both less than predeterminable range thresholding；

If it is, increase N, until the covariance matrix of described Resource Block with increase after the association of N number of Adjacent resource block Distance between variance matrix be both less than predeterminable range thresholding, determine current resource block increase with it after N number of Adjacent resource The average resource set of blocks that block is constituted；

If it is not, then determine the average resource set of blocks being made up of current resource block with N number of Adjacent resource block；

Each Resource Block average covariance matrices R(b is calculated) according to described average resource set of blocks.

Preferably, the distance between the covariance matrix and N number of Adjacent resource block of each described Resource Block of described judgement Whether less than before predeterminable range thresholding, in described calculating described estimation channel response H the covariance matrix of each Resource Block it After, also include:

The covariance matrix of Resource Block each described is smoothed in time domain.

It is preferably based on local pilot signal docking collection of letters Y and carries out channel estimation, obtain channel response H, and calculate institute State the average covariance matrices R(b receiving signal Y place each Resource Block) process include:

Carry out channel estimation based on local pilot signal docking collection of letters Y, obtain channel response H；

The covariance matrix of each Resource Block is calculated according to described channel response H；

Each Resource Block average covariance matrices R(b is calculated) according to default average resource set of blocks.

Preferably, according to the described average covariance matrices R(b of Resource Block each described) calculate, obtain corresponding each AF panel compensating parameter W(b of individual described Resource Block) process include: by described average covariance matrices R(b) be converted to $\mathrm{Rb}=\left[\begin{array}{cc}\mathrm{Rb}\left(\mathrm{1,1}\right)& \mathrm{Rb}\left(\mathrm{1,2}\right)\\ \mathrm{Rb}\left(\mathrm{2,1}\right)& \mathrm{Rb}\left(\mathrm{2,2}\right)\end{array}\right],$

Wherein, Rb (1,1) represents the interference noise variance of reception antenna 0, and Rb (1,2) represents reception antenna 0 and receives sky The interference noise covariance of line 1, Rb (2,1) represents reception antenna 1 and the interference noise covariance of reception antenna 0, Rb (2,2) table Show the interference noise variance of reception antenna 1；

Work as Rb(1,1) more than or equal to Rb(2,2) time, foundation $W\left(b\right)=\left(\begin{array}{cc}\mathrm{\γ}& -\mathrm{\ρ}\\ 0& \sqrt{1-{\left|\mathrm{\ρ}\right|}^2}\end{array}\right),$ Obtain AF panel and compensate ginseng Number W(b)；

Wherein, γ, ρ are constant, $\mathrm{\γ}=\sqrt{\frac{\mathrm{Rb}\left(\mathrm{2,2}\right)}{\mathrm{Rb}\left(\mathrm{1,1}\right)}},$ $\mathrm{\ρ}=\frac{\mathrm{\γ}\·\mathrm{Rb}\left(\mathrm{1,2}\right)}{\mathrm{Rb}\left(\mathrm{2,2}\right)}.$

Preferably, according to the described average covariance matrices R(b of Resource Block each described) calculate, obtain corresponding each AF panel compensating parameter W(b of individual described Resource Block) process include: by described average covariance matrices R(b) be converted to $\mathrm{Rb}=\left[\begin{array}{cc}\mathrm{Rb}\left(\mathrm{1,1}\right)& \mathrm{Rb}\left(\mathrm{1,2}\right)\\ \mathrm{Rb}\left(\mathrm{2,1}\right)& \mathrm{Rb}\left(\mathrm{2,2}\right)\end{array}\right],$

Wherein, Rb (1,1) represents the interference noise variance of reception antenna 0, and Rb (1,2) represents reception antenna 0 and receives sky The interference noise covariance of line 1, Rb (2,1) represents reception antenna 1 and the interference noise covariance of reception antenna 0, Rb (2,2) table Show the interference noise variance of reception antenna 1；

Work as Rb(1,1), time less than Rb(2,2), R'=P R P is made, wherein, $P=\left[\begin{array}{cc}0& 1\\ 1& 0\end{array}\right];$

Foundation $V=\left(\begin{array}{cc}\mathrm{\γ}& -\mathrm{\ρ}\\ 0& \sqrt{1-{\left|\mathrm{\ρ}\right|}^2}\end{array}\right),$ Obtain AF panel compensating parameter W (b)=P V P；

Wherein, γ, ρ are constant, $\mathrm{\γ}=\sqrt{\frac{\mathrm{Rb}\left(\mathrm{2,2}\right)}{\mathrm{Rb}\left(\mathrm{1,1}\right)}},$ $\mathrm{\ρ}=\frac{\mathrm{\γ}\·\mathrm{Rb}\left(\mathrm{1,2}\right)}{\mathrm{Rb}\left(\mathrm{2,2}\right)}.$

Preferably, according to the described average covariance matrices R(b of Resource Block each described) calculate, obtain corresponding each Variance NoiseVar(b of the equivalent white Gaussian noise of individual described Resource Block) process include:

According to NoiseVar (b)=Rb (2,2) (1-| ρ |²) obtain the equivalent white Gaussian of each described Resource Block corresponding Variance NoiseVar(b of noise).

Preferably, according to the described average covariance matrices R(b of Resource Block each described) calculate, obtain corresponding each Variance NoiseVar(b of the equivalent white Gaussian noise of individual described Resource Block) including:

According to NoiseVar (b)=Rb'(2,2) (1-| ρ |²) obtain the equivalent white Gaussian of each described Resource Block corresponding Variance NoiseVar(b of noise).

A kind of LTE system AF panel receives device, including:

Covariance computing unit, for carrying out channel estimation based on local pilot signal docking collection of letters Y, obtains channel and rings Answer H, and calculate the average covariance matrices R(b of each Resource Block of described reception signal Y place)；

AF panel parameter calculation unit, for according to the described average covariance matrices R(b of Resource Block each described) enter Row calculates, and obtains AF panel compensating parameter W(b of each described Resource Block corresponding) and the variance of equivalence white Gaussian noise NoiseVar(b)；

Pre-compensation unit, is used for determining signal place to be compensated Resource Block in described reception signal Y, according to described to be compensated AF panel compensating parameter W(b that signal place Resource Block is corresponding) and described channel response H carry out signal compensation, be compensated After reception signal Y ' (b).

Preferably, said apparatus also includes:

Balanced unit, for choosing the variance of equivalent white Gaussian noise corresponding to described signal place to be compensated Resource Block NoiseVar(b), to the reception signal Y'(b after described compensation) carry out equilibrium treatment.

Preferably, described covariance computing unit includes:

Channel estimating unit, for carrying out channel estimation based on local pilot signal docking collection of letters Y, obtains channel response H；

Every Resource Block computing unit, for calculating the covariance matrix of each Resource Block according to described channel response H；

Frequency domain parameter estimation unit, for judging the covariance matrix of each described Resource Block and N number of Adjacent resource block Whether the distance between covariance matrix is both less than predeterminable range thresholding；

Frequency domain averaging unit, for calculating each Resource Block average covariance matrices R according to described average resource set of blocks (b).

Preferably, also include:

Time domain smooth unit, for being smoothed in time domain the covariance matrix of Resource Block each described.

Preferably, also include:

Selecting switch K, being used for selecting frequency domain parameter estimation unit to determine can average resource set of blocks or select preset average Resource Block set.

Understand via above-mentioned technical scheme, compared with prior art, the invention discloses a kind of LTE system AF panel Method of reseptance and device.Carry out channel estimation based on local pilot signal docking collection of letters Y, obtain channel response H, and according to letter Road response H calculates the average covariance matrices R(b of each Resource Block described)；According to the described average association of Resource Block each described Variance matrix R(b) calculate, obtain AF panel compensating parameter W(b of each described Resource Block corresponding) and equivalence white Gaussian Variance NoiseVar(b of noise)；Determine signal place Resource Block b to be compensated in described reception signal Y, according to described to be compensated AF panel compensating parameter W(b that signal place Resource Block is corresponding) and described channel response H carry out signal compensation, be compensated After reception signal Y '.Based on said method and device, it is possible to obtain average covariance matrices R(b more accurately), it is ensured that dry Disturb accuracy and the performance of whole communication network that suppression receives.

Accompanying drawing explanation

In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this Inventive embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to The accompanying drawing provided obtains other accompanying drawing.

Fig. 1 is a kind of LTE system AF panel method of reseptance flow chart disclosed in the embodiment of the present invention one；

Fig. 2 is another kind of LTE system AF panel method of reseptance flow chart disclosed in the embodiment of the present invention two；

Fig. 3 is the descending public reference signal resource location at two-dimensional grid that base station possesses 4 common antenna port One schematic diagram；

Fig. 4 is the descending public reference signal resource location at two-dimensional grid that base station possesses 4 common antenna port Another schematic diagram；

Fig. 5 is to calculate the averagely side of association in another kind of LTE system AF panel method of reseptance disclosed in the embodiment of the present invention two The particular flow sheet of difference matrix R；

Fig. 6 is that disclosed in the embodiment of the present invention three, a kind of LTE system AF panel receives device concrete structure schematic diagram；

Fig. 7 is that disclosed in the embodiment of the present invention four, another kind of LTE system AF panel receives device concrete structure schematic diagram；

Fig. 8 is that disclosed in the embodiment of the present invention four, another kind of LTE system AF panel receives average covariance meter in device Calculate the concrete structure schematic diagram of unit.

Detailed description of the invention

For the sake of quoting and understanding, the explanation of the technical term being used below, write a Chinese character in simplified form or abridge and be summarized as follows:

LTE:Long Term Evolution system, long evolving system；

IRC:Interference Rejection Combining, AF panel merges algorithm；

OFDM:Orthogonal Frequency Division Multiplexing, OFDM.

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise Embodiment, broadly falls into the scope of protection of the invention.

From background technology, prior art utilizes IRC carry out AF panel and receive covariance matrix R obtained by estimation It is inaccurate, is likely to result in after the signal received is carried out IRC process, not only can not eliminate interference, more even worse than before processing on the contrary. Therefore in prior art, utilizing IRC to carry out AF panel reception, accuracy is low, can affect the property of whole communication network time serious Energy.

The invention discloses a kind of LTE system AF panel method of reseptance and device.Based on local pilot signal to reception Signal Y carries out channel estimation, obtains channel response H, and calculates the average covariance of each Resource Block described according to channel response H Matrix R(b)；According to the described average covariance matrices R(b of Resource Block each described) calculate, obtain corresponding described in each AF panel compensating parameter W(b of Resource Block) and variance NoiseVar(b of equivalence white Gaussian noise)；Determine that described reception is believed Signal place Resource Block b to be compensated in number Y, according to the AF panel compensating parameter that described signal place to be compensated Resource Block is corresponding And described channel response H carries out signal compensation, the reception signal Y ' after being compensated W(b).Based on said method and device, energy Enough obtain average covariance matrices R(b more accurately), it is ensured that accuracy that AF panel receives and whole communication network Performance.

Will be by following about the idiographic flow of this LTE system AF panel method of reseptance and the concrete structure of this device Embodiment is described in detail.

Embodiment one

Refer to accompanying drawing 1, a kind of LTE system AF panel method of reseptance flow chart disclosed in the embodiment of the present invention one, Mainly comprise the steps that

Step S101: carry out channel estimation based on local pilot signal docking collection of letters Y, obtain channel response H, and calculate The average covariance matrices R(b of each Resource Block of described reception signal Y place), wherein b is Resource Block index；

LTE system uses OFDM technology, and the resource location of transmission is by time, the instruction of frequency two dimension resource grid, at grid In each grid represent 1 subcarrier in 1 OFDM symbol.

The a length of 1ms(millisecond of a normal sub-frames defined in LTE system), each normal sub-frames by 2 0.5ms time Gap is constituted, and two-dimensional grid is then by frequency domain 12 subcarriers, and in time domain, 1 time slot constitutes and is defined as Resource Block.Receive Signal Y is distributed in multiple Resource Block.

When performing step S101, first, based on local pilot signal, by using some well-known channels to estimate Method, such as Minimum Mean Squared Error estimation, least square, maximum likelihood or Kalman filter, docking collection of letters Y carries out channel Estimate, export channel response H, then calculate the average covariance matrices R(b of each Resource Block according to channel response H).

It should be noted that frequency selectivity based on interference, in time domain, short period internal interference has successional Feature, say, that the disturbed condition of Adjacent resource block is close.Average covariance matrices R(b calculating each Resource Block) During, adjacent with calculated Resource Block, to have close interference Resource Block can be combined, then utilize this group All Resource Block in conjunction calculate this and are calculated the average covariance matrices R(b of Resource Block), and by non-conterminous, interference difference King-sized Resource Block forecloses, and obtains the average covariance matrices R(b of each Resource Block more accurately).

Step S102: according to the described average covariance matrices R(b of Resource Block each described) calculate, obtain correspondence AF panel compensating parameter W(b of each described Resource Block) and variance NoiseVar(b of equivalence white Gaussian noise)；

Based on step S101, during performing step S102, according to Resource Block b's calculated in step S101 Average covariance matrices R(b), by comparing the average covariance matrices R(b of Resource Block b) in element-specific, and use difference Method be calculated AF panel compensating parameter W(b of each described Resource Block corresponding) and the variance of equivalent white Gaussian noise NoiseVar(b).

It should be noted that due to average covariance matrices R(b to each Resource Block in step S101) calculating more Accurately, present invention improvement algorithmically is added, it is possible to interference more quick, accurately acquisition each described Resource Block corresponding Suppression compensating parameter W(b) and variance NoiseVar(b of equivalence white Gaussian noise).Each described Resource Block calculated AF panel compensating parameter W(b) span all between [0,1], it is ensured that data will not produce spilling.

Step S103: determine signal place to be compensated Resource Block in described reception signal Y, according to described signal institute to be compensated In AF panel compensating parameter W(b that Resource Block is corresponding) and described channel response H carry out signal compensation, connecing after being compensated Collection of letters Y ' (b).

Receiving in signal Y and there are several signals to be compensated, different signals to be compensated is present in different Resource Block In.For each reception signal Y, it is necessary first to determine signal to be compensated therein, and the resource at this signal place to be compensated Block, then obtains according to step S101 and AF panel compensating parameter W(b of calculated respective resources block in step S102) With channel response H(b) carry out signal compensation, reception signal Y ' (b) after being compensated.

By the LTE system AF panel method of reseptance disclosed in above-described embodiment one, by estimating that H calculates according to channel The average covariance matrices R(b of each Resource Block), as the average covariance matrices R(b of current calculated Resource Block), energy Access the average covariance matrices R(b of each Resource Block more accurately), the process received for whole AF panel is established Basis, it is ensured that the accuracy of AF panel reception and the performance of whole communication network.

Embodiment two

Refer to accompanying drawing 2, a kind of LTE system AF panel method of reseptance flow chart disclosed in the embodiment of the present invention two, Mainly comprise the steps that

Step S101: carry out channel estimation based on local pilot signal docking collection of letters Y, obtain channel response H, and calculate The average covariance matrices R(b of each Resource Block of described reception signal Y place)；

LTE system uses OFDM technology, and the resource location of transmission is by time, the instruction of frequency two dimension resource grid, at grid In each grid represent 1 subcarrier in 1 OFDM symbol.

The a length of 1ms(millisecond of a normal sub-frames defined in LTE system), each normal sub-frames by 2 0.5ms time Gap is constituted, and two-dimensional grid is then by frequency domain 12 subcarriers, and in time domain, 1 time slot constitutes and is defined as Resource Block.Receive Signal Y is distributed in multiple Resource Block.

The base station be given such as Fig. 3 possesses the descending public reference signal resource at two-dimensional grid of 4 common antenna port Position.Wherein, the money of the distribution of R0, R1, R2, R3 reference signal that correspondence expression transmission antenna port 0,1,2,3 sends respectively Source position, the region in the thick frame of black is Resource Block 0, and remaining Resource Block can by parity of reasoning, represents with ellipsis, each little side Lattice are referred to as Resource Unit, and by coordinate, (k, l) uniquely determines, wherein, k represents that frequency indices, l represent that time-domain symbol indexes, simultaneously By coordinate, (k l) can calculate the Resource Block at this Resource Unit place.Fig. 3 is illustrated that normal cyclic prefix, shown in Fig. 4 It it is extended cyclic prefix.

Reception antenna port 0 and 1 is possessed in end side.We make jth (0≤j < Nr, Nr is reception antenna port number) root Reception antenna reference signal resource location (k, l) receive from i-th (0≤i < Nt, Nt is reception antenna port number) root The reference signal of transmission antenna port is r_ji(k, l), at non-reference signal resource location, (k l) receives jth root reception antenna Data signal is y_j(k.l), Y={y is made_j(k, l) | j, k, l} represent reception signal.

When performing step S101, first, based on local pilot signal, by using some well-known channels to estimate Method, such as Minimum Mean Squared Error estimation, least square, maximum likelihood or Kalman filter, docking collection of letters Y is distributed in resource Data signal y in block_j(k.l) channel estimation is carried out, output estimation channel responseAnd make Represent channel response set, then calculate the average covariance matrices R(b of each Resource Block).

Referring to accompanying drawing 5, this process is specifically made up of the following steps:

Step S201: carry out channel estimation based on local pilot signal docking collection of letters Y, obtain channel response H；

Present invention assumes that receiving terminal has two reception antennas, therefore transmission antenna i (0,1,2,3) to reception antenna j (0, 1) the local pilot signal on the l symbol of kth subcarrier can be expressed as

r_ji(k,l)=h_ji(k,l)+m_ji(k,l)

Based on local pilot signal, by using some well-known channel estimation methods, as least mean-square error is estimated Meter, least square, maximum likelihood or Kalman filter, data signal y that docking collection of letters Y is distributed in Resource Block_j(k.l) Carry out channel estimation, output estimation channel response respectivelyAnd make $H=\{{\tilde{h}}_{\mathrm{ji}}(k,l)i,j,k.l\}$ Represent channel response.

Step S202: calculate the covariance matrix of each Resource Block according to described channel response H；

Estimate the covariance matrix of each Resource Block according to formula, concrete formula is

$\hat{R}\left(b\right)=\frac{1}{N_{\mathrm{tot}}}\underset{i\&Element;S_t}{\mathrm{\&Sigma;}}\underset{k\&Element;S_{k,l}}{\mathrm{\&Sigma;}}\left[\begin{array}{c}{r}_{0i}(k,l)-{\tilde{h}}_{0i}(k,l)\\ r_{1i}(k,l)-{\tilde{h}}_{1i}(k,l)\end{array}\right]{\left[\begin{array}{c}{r}_{0i}(k,l)-{\tilde{h}}_{0i}(k,l)\\ r_{1i}(k,l)-\widetilde{h_{1i}}(k,l)\end{array}\right]}^H$

Wherein, b represents that Resource Block indexes, S_klFor the local set of pilot signals participating in calculating in this Resource Block, S_tFor The transmission antenna set participating in calculating in this Resource Block, N^totFor all local pilot signal quantity participating in and calculating.Need Bright, participate in local set of pilot signals S that above-mentioned formula calculates_{K, l}Can be whole, also by comprised in whole Resource Block A part therein can be chosen for according to the computation rule pre-set.Equally, the transmission antenna that above-mentioned formula calculates is participated in Set S_tCan be whole by comprised in whole Resource Block, it is also possible to be chosen for therein according to the computation rule pre-set A part.

Step S203: the covariance matrix of Resource Block each described is smoothed in time domain；

Smooth in time domain according to the covariance matrix that the formula each resource to calculating is fast, calculation For:Wherein, α (0 < α≤1) is smoothing factor, can carry out according to the practical situation of LTE system Configuration, both can pre-set, it is also possible to be change.

It should be noted that this step is the averagely side of association in order to be further ensured that each Resource Block the most calculated Difference matrix R(b) accuracy, for application less demanding in the case of, can select not use this step to each Resource Block Covariance matrix be smoothed.

Step S204: determine the average resource set of blocks of each Resource Block；

This step can be realized by two kinds of methods, specific as follows:

Method one: judge between the covariance matrix of each described Resource Block and the covariance matrix of N number of Adjacent resource block Distance whether be both less than predeterminable range thresholding；

If it is, increase N, until the covariance matrix R of described Resource Block with increase after the association of N number of Adjacent resource block Distance between variance matrix R be both less than predeterminable range thresholding, determine current resource block increase with it after N number of Adjacent resource The average resource set of blocks that block is constituted；

If it is not, then determine the average resource set of blocks being made up of current resource block with N number of Adjacent resource block；

Concrete calculating process is: calculate the distance of its covariance matrix and the covariance matrix of adjacent N number of Resource BlockWherein ‖ ‖ is Frobenius norm.Judge whether above-mentioned distance is less than predeterminable range thresholding F, if the fullest Foot, then expand N, until can not meet, and export this Resource Block can average resource set of blocks S_b.It should be noted that above-mentioned away from Can configure according to the practical situation of LTE system from thresholding F.

Method two: to each Resource Block b, can configure according to the practical situation of LTE system, determines that this Resource Block can be put down All Resource Block set S_b

It should be noted that method one and method two can obtain this Resource Block can average resource set of blocks Sb.Simply side Method one is more accurate, and method is the most relatively easy, specifically can select using method one or method two according to application demand.

Step S205: calculate the average covariance matrices R(b of each Resource Block according to described average resource set of blocks).

The average covariance matrices R(b of each Resource Block is calculated according to formula), calculation is:

Wherein N_bFor average resource set of blocks S_bThe number of middle element.

Needing further exist for explanation, frequency selectivity based on interference, in time domain, short period internal interference has even The feature of continuous property, say, that the disturbed condition of Adjacent resource block is close.At the average covariance matrices R calculating each Resource Block During (b), adjacent with calculated Resource Block, to have close interference Resource Block can be combined, then utilize All Resource Block in this combination calculate this and are calculated the average covariance matrices R(b of Resource Block), and by non-conterminous, dry Disturb the king-sized Resource Block of difference to foreclose, obtain the average covariance matrices R(b of each Resource Block more accurately).

Step S102: according to the described average covariance matrices R(b of Resource Block each described) calculate, obtain correspondence AF panel compensating parameter W(b of each described Resource Block) and variance NoiseVar(b of equivalence white Gaussian noise).

Based on step S101, during performing step S102, according to Resource Block b(b calculated in step S101 Index for Resource Block) average covariance matrices R (b), specific by compare in average covariance matrices R (b) of Resource Block b Element, and use different methods to be calculated AF panel compensating parameter W(b of each described Resource Block corresponding) and equivalence height Variance NoiseVar(b of this white noise).

Concrete calculating process is as follows:

Making Rb=R (b), the most described average covariance matrices Rb is represented by $\mathrm{Rb}=\left[\begin{array}{cc}\mathrm{Rb}\left(\mathrm{1,1}\right)& \mathrm{Rb}\left(\mathrm{1,2}\right)\\ \mathrm{Rb}\left(\mathrm{2,1}\right)& \mathrm{Rb}\left(\mathrm{2,2}\right)\end{array}\right],$

Wherein, Rb (1,1) represents the interference noise variance of reception antenna 0, and Rb (1,2) represents reception antenna 0 and receives sky The interference noise covariance of line 1, Rb (2,1) represents reception antenna 1 and the interference noise covariance of reception antenna 0, Rb (2,2) table Show the interference noise variance of reception antenna 1；

Situation one: work as Rb(1,1) more than or equal to Rb(2,2) time, foundation $W\left(b\right)=\left(\begin{array}{cc}\mathrm{\&gamma;}& -\mathrm{\&rho;}\\ 0& \sqrt{1-{\left|\mathrm{\&rho;}\right|}^2}\end{array}\right),$ Obtain AF panel Compensating parameter W (b)；

Wherein, γ, ρ are constant, $\mathrm{\&gamma;}=\sqrt{\frac{\mathrm{Rb}\left(\mathrm{2,2}\right)}{\mathrm{Rb}\left(\mathrm{1,1}\right)}},$ $\mathrm{\&rho;}=\frac{\mathrm{\&gamma;}\&CenterDot;\mathrm{Rb}\left(\mathrm{1,2}\right)}{\mathrm{Rb}\left(\mathrm{2,2}\right)}.$

According to NoiseVar (b)=Rb (2,2) (1-| ρ |²) obtain the equivalent white Gaussian of each described Resource Block corresponding Variance NoiseVar (b) of noise.

Situation two: work as Rb(1,1), time less than Rb(2,2), Rb'=P Rb P is made, wherein, $P=\left[\begin{array}{cc}0& 1\\ 1& 0\end{array}\right];$

Foundation $V=\left(\begin{array}{cc}\mathrm{\&gamma;}& -\mathrm{\&rho;}\\ 0& \sqrt{1-{\left|\mathrm{\&rho;}\right|}^2}\end{array}\right),$ Obtain AF panel compensating parameter W (b)=P V P；

Wherein, γ, ρ are constant, $\mathrm{\&gamma;}=\sqrt{\frac{\mathrm{Rb}\left(\mathrm{2,2}\right)}{\mathrm{Rb}\left(\mathrm{1,1}\right)}},$ $\mathrm{\&rho;}=\frac{\mathrm{\&gamma;}\&CenterDot;\mathrm{Rb}\left(\mathrm{1,2}\right)}{\mathrm{Rb}\left(\mathrm{2,2}\right)}.$

According to NoiseVar (b)=Rb'(2,2) (1-| ρ |²) obtain the equivalent white Gaussian of each described Resource Block corresponding Variance NoiseVar (b) of noise.

It should be noted that due in step S101 to the calculating of average covariance matrices R (b) of each Resource Block more Accurately, present invention improvement algorithmically is added, it is possible to interference more quick, accurately acquisition each described Resource Block corresponding Suppression compensating parameter W (b) and variance NoiseVar (b) of equivalence white Gaussian noise.Each described Resource Block calculated AF panel compensating parameter W(b) span all between [0,1], it is ensured that data will not produce spilling.

Step S103: determine signal place Resource Block b to be compensated in described reception signal Y, according to described signal to be compensated AF panel compensating parameter W(b that place Resource Block is corresponding) and described channel response H carry out signal compensation, after being compensated Receive signal Y ' (b).

Receiving in signal Y and there are several signals to be compensated, different signals to be compensated is present in different Resource Block In.For each reception signal Y, it is necessary first to determine signal y to be compensated therein_j, and this signal y to be compensated (k.l)_j (k.l) the Resource Block b at place, then obtains according to calculated respective resources block b dry in step S101 and step S102 Disturb suppression compensating parameter W (b) and channel response H carries out signal compensation, the signal y to be compensated after being compensated_j(k.l) ', and then Reception signal Y ' (b) after being compensated.

Concrete calculating process is as follows:

According to signal y to be compensated_j(k.l) place Resource Unit (k.l) determines the Resource Block at described signal place to be compensated B, and choose compensating parameter W (b) of this Resource Block, order

$y(k,l)=\left[\begin{array}{c}{y}_0(k,l)\\ .\\ .\\ .\\ y_{(N_r-1)}(k,l)\end{array}\right]$

Compensate below implementing:

$y{(k,l)}^{\&prime;}=\left[\begin{array}{c}{y}_0{(k,l)}^{\&prime;}\\ .\\ .\\ .\\ y_{(N_r-1)}{(k,l)}^{\&prime;}\end{array}\right]=W\left(b\right)\&CenterDot;y(k,l),$

Channel response after being compensatedWith compensate after signal y to be compensated (k, l) ', signal compensation to be compensated After complete, obtain in this Resource Block the reception signal Y'(b after overcompensation with the signal common combination needed not compensate for).

Step S104: choose the variance of equivalent white Gaussian noise corresponding to described signal place to be compensated Resource Block NoiseVar(b), to the reception signal Y'(b after described compensation) carry out equilibrium treatment.

Dock after collections of letters Y processes by the method for above each step, reception signal Y'(b) in interference make an uproar Sound has been provided with white noise character, goes for all of equalization methods, as equal in least mean-square error equilibrium or maximum likelihood Weighing apparatus.Use above-mentioned equalization methods, variance based on equivalent white Gaussian noise corresponding to described signal place to be compensated Resource Block NoiseVar(b) the docking collection of letters number mode carrying out equalizing is same as the prior art, repeats no more here.

It should be noted that be all to process, finally according to above step for the reception signal in all Resource Block It is inhibited and disturbs the reception signal Y' after receiving.

By the LTE system AF panel method of reseptance disclosed in above-described embodiment two, by calculating each Resource Block Average covariance matrices R(b), as the average covariance matrices R(b of current calculated Resource Block), it is possible to obtain more accurate The average covariance matrices R(b of each true Resource Block), the process received for whole AF panel lays the foundation；Meanwhile, choosing Take easier algorithm and calculate AF panel compensating parameter W(b), and AF panel compensating parameter W(b drawn) span exists Between [0,1], it is ensured that data will not be overflowed, further ensure accuracy and whole communication network that AF panel receives Performance.

Describing method in detail in the invention described above disclosed embodiment, the method for the present invention can take various forms Device realize, therefore the invention also discloses a kind of device, specific embodiment be given below and be described in detail.

Embodiment three

Referring to accompanying drawing 6, disclosed in the embodiment of the present invention three, a kind of LTE system AF panel receives device concrete structure Schematic diagram, this device is made up of covariance computing unit 10, AF panel parameter calculation unit 11 and pre-compensation unit 12, tool Body linking relationship is as follows:

Covariance computing unit 10, for carrying out channel estimation based on local pilot signal docking collection of letters Y, obtains channel Response H, and calculate the average covariance matrices R(b of each Resource Block of described reception signal Y place) wherein b be Resource Block index；

LTE system uses OFDM technology, and the resource location of transmission is by time, the instruction of frequency two dimension resource grid, at grid In each grid represent 1 subcarrier in 1 OFDM symbol.

The a length of 1ms(millisecond of a normal sub-frames defined in LTE system), each normal sub-frames by 2 0.5ms time Gap is constituted, and two-dimensional grid is then by frequency domain 12 subcarriers, and in time domain, 1 time slot constitutes and be defined as Resource Block, receives Signal Y is distributed in multiple Resource Block.

This covariance computing unit 10 concrete function is as follows:

First, based on local pilot signal, by using some well-known channel estimation methods, such as lowest mean square by mistake Difference estimation, least square, maximum likelihood or Kalman filter, docking collection of letters Y carries out channel estimation, exports channel response H, Then the average covariance matrices R(b of each Resource Block is calculated according to channel response H).

It should be noted that frequency selectivity based on interference, in time domain, short period internal interference has successional Feature, say, that the disturbed condition of Adjacent resource block is close.Average covariance matrices R(b calculating each Resource Block) During, adjacent with calculated Resource Block, to have close interference Resource Block can be combined, then utilize this group All Resource Block in conjunction calculate this and are calculated the average covariance matrices R(b of Resource Block), and by non-conterminous, interference difference King-sized Resource Block forecloses, and obtains the average covariance matrices R(b of each Resource Block more accurately).

AF panel parameter calculation unit 11, for according to the described average covariance matrices R(b of Resource Block each described) Calculate, obtain AF panel compensating parameter W(b of each described Resource Block corresponding) and the variance of equivalence white Gaussian noise NoiseVar(b)；

The concrete function of this AF panel parameter calculation unit 11 is as follows:

Average covariance matrices R(b according to covariance computing unit 10 calculated Resource Block b), by the most each The average covariance matrices R(b of individual Resource Block) in element-specific, and it is corresponding described in each to use different methods to be calculated AF panel compensating parameter W(b of Resource Block) and variance NoiseVar(b of equivalence white Gaussian noise).

It should be noted that due to average covariance matrices R(b to each Resource Block in covariance computing unit 10) Being accurately calculated, the algorithm adding the employing of this AF panel parameter calculation unit 11 improves to some extent, it is possible to more quick, accurate Really obtain AF panel compensating parameter W(b of each described Resource Block corresponding) and variance NoiseVar of equivalence white Gaussian noise (b).The span of AF panel compensating parameter W of each described Resource Block calculated all between [0,1], Ke Yibao Card data will not produce spilling.

Pre-compensation unit 12, is used for determining signal place to be compensated Resource Block in described reception signal Y, waits to mend described in foundation Repay AF panel compensating parameter W(b that signal place Resource Block is corresponding) and described channel response H carry out signal compensation, mended Reception signal Y ' (b) after repaying.

Receiving in signal Y and there are several signals to be compensated, different signals to be compensated is present in different Resource Block In.For each reception signal Y, pre-compensation unit 12 is firstly the need of determining signal to be compensated therein, and this letter to be compensated The Resource Block at number place, then obtains and obtains according to calculating in covariance computing unit 10 and AF panel parameter calculation unit 11 AF panel compensating parameter W(b of respective resources block) and channel response H carry out signal compensation, the reception letter after being compensated Number Y ' (b).

Device is received, by covariance computing unit meter by the LTE system AF panel disclosed in above-described embodiment three Calculate the average covariance matrices R(b of each Resource Block), as the average covariance matrices R(b of current calculated Resource Block), The average covariance matrices R(b of each Resource Block more accurately can be obtained), the process received for whole AF panel is established Fixed basis, it is ensured that the accuracy of AF panel reception and the performance of whole communication network.

Embodiment four

Referring to accompanying drawing 7, disclosed in the embodiment of the present invention four, a kind of LTE system AF panel receives device concrete structure Figure, this device includes: covariance computing unit 10, AF panel parameter calculation unit 11, pre-compensation unit 12 and equilibrium are single Unit 13, concrete annexation is as follows:

Covariance computing unit 10, for carrying out channel estimation based on local pilot signal docking collection of letters Y, obtains channel Response H, and calculate the average covariance matrices R(b of each Resource Block of described reception signal Y place)；

LTE system uses OFDM technology, and the resource location of transmission is by time, the instruction of frequency two dimension resource grid, at grid In each grid represent 1 subcarrier in 1 OFDM symbol.

The a length of 1ms(millisecond of a normal sub-frames defined in LTE system), each normal sub-frames by 2 0.5ms time Gap is constituted, and two-dimensional grid is then by frequency domain 12 subcarriers, and in time domain, 1 time slot constitutes and be defined as Resource Block, receives Signal Y is distributed in multiple Resource Block.

This covariance computing unit 10 concrete function is as follows:

First, based on local pilot signal, by using some well-known channel estimation methods, such as lowest mean square by mistake Difference estimation, least square, maximum likelihood or Kalman filter, data signal y that docking collection of letters Y is distributed in Resource Block_j (k.l) carry out channel estimation, estimate channel responseAnd makeRepresent channel response set, so The average covariance matrices R(b of rear each Resource Block of calculating).

This function can divide again a few step to complete, and refers to accompanying drawing 8, for covariance computing unit 10 in the embodiment of the present invention four Concrete structure, specific as follows:

Channel estimating unit 101, for carrying out channel estimation based on local pilot signal docking collection of letters Y, obtains channel Response H；

Present invention assumes that receiving terminal has two reception antennas, therefore transmission antenna i (0,1,2,3) to reception antenna j (0, 1) the local pilot signal on the 1st symbol of kth subcarrier can be expressed as

r_ji(k)=h_ji(k)+m_ji(k)

Based on local pilot signal, by using some well-known channel estimation methods, as least mean-square error is estimated Meter, least square, maximum likelihood or Kalman filter, data signal y that docking collection of letters Y is distributed in Resource Block_j(k.l) Carry out channel estimation, output estimation channel response respectivelyAnd makeRepresent channel response.

Every Resource Block computing unit 102, calculates the covariance matrix of each Resource Block according to described channel response H；

Estimate the covariance matrix of each Resource Block according to formula, concrete formula is

$\hat{R}\left(b\right)=\frac{1}{N_{\mathrm{tot}}}\underset{i\&Element;S_t}{\mathrm{\&Sigma;}}\underset{k\&Element;S_{k,l}}{\mathrm{\&Sigma;}}\left[\begin{array}{c}{r}_{0i}(k,l)-{\tilde{h}}_{0i}(k,l)\\ r_{1i}(k,l)-{\tilde{h}}_{1i}(k,l)\end{array}\right]{\left[\begin{array}{c}{r}_{0i}(k,l)-{\tilde{h}}_{0i}(k,l)\\ r_{1i}(k,l)-\widetilde{h_{1i}}(k,l)\end{array}\right]}^H$

Wherein, b represents that Resource Block indexes, S_kFor the local set of pilot signals participating in calculating in this Resource Block, S_tFor this The transmission antenna set participating in calculating in Resource Block, N_totFor all local pilot signal quantity participating in and calculating.Need explanation , participate in local set of pilot signals S that above-mentioned formula calculates_kCan be whole by comprised in whole Resource Block, it is possible to To be chosen for a part therein according to the computation rule pre-set.Equally, the transmission antenna collection that above-mentioned formula calculates is participated in Close S_tCan be whole by comprised in whole Resource Block, it is also possible to be chosen for therein one according to the computation rule pre-set Part.

Time domain smooth unit 103, for being smoothed in time domain the covariance matrix of Resource Block each described；

Covariance matrix according to the formula each Resource Block to calculating smooths in time domain, calculation For:Wherein, α (0 < α≤1) is smoothing factor, can carry out according to the practical situation of LTE system Configuration, both can pre-set, it is also possible to be change.

It should be noted that this unit is the averagely side of association in order to be further ensured that each Resource Block the most calculated Difference matrix R(b) accuracy, for application less demanding in the case of, can select not use this unit to each Resource Block Covariance matrix be smoothed.

Frequency domain parameter estimation unit 104, for determining the average resource set of blocks of each Resource Block；

Judge that the distance between the covariance matrix of each described Resource Block and the covariance matrix of N number of Adjacent resource block is No both less than predeterminable range thresholding；

If it is, increase N, until the covariance matrix R of described Resource Block with increase after the association of N number of Adjacent resource block Distance between variance matrix R be both less than predeterminable range thresholding, determine current resource block increase with it after N number of Adjacent resource The average resource set of blocks that block is constituted；

If it is not, then determine the average resource set of blocks being made up of current resource block with N number of Adjacent resource block；

Concrete calculating process is: calculate the distance of its covariance matrix and the covariance matrix of adjacent N number of Resource BlockWherein ‖ ‖ is Frobenius norm.Judge whether above-mentioned distance is less than predeterminable range thresholding F, if the fullest Foot, then expand N, until can not meet, and export this Resource Block can average resource set of blocks S_b.It should be noted that above-mentioned away from Can configure according to the practical situation of LTE system from thresholding F.

It should be noted that can average resource set of blocks S except using frequency domain parameter estimation unit 104 to obtain_b, it is also possible to To each Resource Block b, can configure according to the practical situation of LTE system, determine that this Resource Block can average resource set of blocks S_b。 Can select to use frequency domain parameter estimation unit 104 to obtain by selection switch K at this can average resource set of blocks S_bOr choosing Select each Resource Block b, can configure according to the practical situation of LTE system, determine that this Resource Block can average resource set of blocks S_b。

Frequency domain averaging unit 105, for calculating the average covariance of each Resource Block according to described average resource set of blocks Matrix R(b).

The average covariance matrices R(b of each Resource Block is calculated according to formula), calculation is:

Wherein N_bFor average resource set of blocks S_bThe number of middle element.

It should be noted that frequency selectivity based on interference, in time domain, short period internal interference has successional Feature, say, that the disturbed condition of Adjacent resource block is close.Average covariance matrices R(b calculating each Resource Block) During, adjacent with calculated Resource Block, to have close interference Resource Block can be combined, then utilize this group All Resource Block in conjunction calculate this and are calculated the average covariance matrices R(b of Resource Block), and by non-conterminous, interference difference King-sized Resource Block forecloses, and obtains the average covariance matrices R(b of each Resource Block more accurately).

AF panel parameter calculation unit 11, for according to the described average covariance matrices R(b of Resource Block each described) Calculate, obtain AF panel compensating parameter W(b of each described Resource Block corresponding) and the variance of equivalence white Gaussian noise NoiseVar(b)；

The concrete function of this AF panel parameter calculation unit 11 is as follows:

Average covariance matrices R(b according to covariance computing unit 10 each Resource Block calculated b), by than The average covariance matrices R(b of relatively each Resource Block b) in element-specific, and it is corresponding each to use different methods to be calculated AF panel compensating parameter W(b of individual described Resource Block) and variance NoiseVar(b of equivalence white Gaussian noise).Concrete calculating Process is as follows:

Making Rb=R (b), the most described average covariance matrices Rb is represented by $\mathrm{Rb}=\left[\begin{array}{cc}\mathrm{Rb}\left(\mathrm{1,1}\right)& \mathrm{Rb}\left(\mathrm{1,2}\right)\\ \mathrm{Rb}\left(\mathrm{2,1}\right)& \mathrm{Rb}\left(\mathrm{2,2}\right)\end{array}\right],$

Wherein, Rb (1,1) represents the interference noise variance of reception antenna 0, and Rb (1,2) represents reception antenna 0 and receives sky The interference noise covariance of line 1, Rb (2,1) represents reception antenna 1 and the interference noise covariance of reception antenna 0, Rb (2,2) table Show the interference noise variance of reception antenna 1；

Situation one: work as Rb(1,1) more than or equal to Rb(2,2) time, foundation $W\left(b\right)=\left(\begin{array}{cc}\mathrm{\&gamma;}& -\mathrm{\&rho;}\\ 0& \sqrt{1-{\left|\mathrm{\&rho;}\right|}^2}\end{array}\right),$ Obtain AF panel Compensating parameter W (b)；

Wherein, γ, ρ are constant, $\mathrm{\&gamma;}=\sqrt{\frac{\mathrm{Rb}\left(\mathrm{2,2}\right)}{\mathrm{Rb}\left(\mathrm{1,1}\right)}},$ $\mathrm{\&rho;}=\frac{\mathrm{\&gamma;}\&CenterDot;\mathrm{Rb}\left(\mathrm{1,2}\right)}{\mathrm{Rb}\left(\mathrm{2,2}\right)}.$

According to NoiseVar (b)=Rb (2,2) (1-| ρ |²) obtain the equivalent white Gaussian of each described Resource Block corresponding Variance NoiseVar (b) of noise.

Situation two: work as Rb(1,1), time less than Rb(2,2), Rb'=P Rb P is made, wherein, $P=\left[\begin{array}{cc}0& 1\\ 1& 0\end{array}\right];$

Foundation $V=\left(\begin{array}{cc}\mathrm{\&gamma;}& -\mathrm{\&rho;}\\ 0& \sqrt{1-{\left|\mathrm{\&rho;}\right|}^2}\end{array}\right),$ Obtain AF panel compensating parameter W (b)=P V P；

Wherein, γ, ρ are constant, $\mathrm{\&gamma;}=\sqrt{\frac{\mathrm{Rb}\left(\mathrm{2,2}\right)}{\mathrm{Rb}\left(\mathrm{1,1}\right)}},$ $\mathrm{\&rho;}=\frac{\mathrm{\&gamma;}\&CenterDot;\mathrm{Rb}\left(\mathrm{1,2}\right)}{\mathrm{Rb}\left(\mathrm{2,2}\right)}.$

According to NoiseVar (b)=Rb'(2,2) (1-| ρ |²) obtain the equivalent white Gaussian of each described Resource Block corresponding Variance NoiseVar (b) of noise.

It should be noted that due to average covariance matrices R(b to each Resource Block in covariance computing unit 10) Being accurately calculated, the algorithm adding the employing of this AF panel parameter calculation unit 11 improves to some extent, it is possible to more quick, accurate Really obtain AF panel compensating parameter W(b of each described Resource Block corresponding) and variance NoiseVar of equivalence white Gaussian noise (b).AF panel compensating parameter W(b of each described Resource Block calculated) span all between [0,1], can To ensure that data will not produce spilling.

Pre-compensation unit 12, is used for determining signal place Resource Block b to be compensated in described reception signal Y, treats described in foundation Compensate AF panel compensating parameter W(b that signal place Resource Block is corresponding) and described channel response H carry out signal compensation, obtain Reception signal Y ' (b) after compensation.

Receiving in signal Y and there are several signals to be compensated, different signals to be compensated is present in different Resource Block In.For each reception signal Y, pre-compensation unit 12 is firstly the need of determining signal y to be compensated therein_j, and this is treated (k.l) Compensate signal y_j(k.l) the Resource Block b at place, then obtains and calculates single according to covariance computing unit 10 and AF panel parameter AF panel compensating parameter W(b of calculated respective resources block in unit 11) and channel response H(b) carry out signal compensation, Signal y to be compensated after being compensated_j(k.l) reception signal Y ' (b) ', and then after being compensated.

Concrete calculating process is as follows:

According to signal y to be compensated_j(k.l) place Resource Unit (k.l) determines the Resource Block at described signal place to be compensated B, and choose compensating parameter W (b) of this Resource Block, order

$y(k,l)=\left[\begin{array}{c}{y}_0(k,l)\\ .\\ .\\ .\\ y_{(N_r-1)}(k,l)\end{array}\right]$

Compensate below implementing:

$y{(k,l)}^{\&prime;}=\left[\begin{array}{c}{y}_0{(k,l)}^{\&prime;}\\ .\\ .\\ .\\ y_{(N_r-1)}{(k,l)}^{\&prime;}\end{array}\right]=W\left(b\right)\&CenterDot;y(k,l),$

Channel response after being compensatedWith compensate after signal y to be compensated (k, l) ', signal compensation to be compensated After complete, obtain in this Resource Block the reception signal Y'(b after overcompensation with the signal common combination needed not compensate for).

Balanced unit 13, for choosing the variance of equivalent white Gaussian noise corresponding to described signal place to be compensated Resource Block NoiseVar(b), to the reception signal Y'(b after described compensation) carry out equilibrium treatment.

By the docking of above unit after collections of letters Y processes, reception signal Y'(b) in interference noise Possess white noise character, go for all of balancer, such as least mean-square error equalizer or maximum likelihood equalizer. Use above-mentioned balancer, variance based on equivalent white Gaussian noise corresponding to described signal place to be compensated Resource Block NoiseVar(b) the docking collection of letters number mode carrying out equalizing is same as the prior art, repeats no more here.

It should be noted that be all to process, finally according to above step for the reception signal in all Resource Block It is inhibited and disturbs the reception signal Y' after receiving.

Device is received, by covariance computing unit 10 by the LTE system AF panel disclosed in above-described embodiment four The average covariance matrices R(b of each Resource Block), as the average covariance matrices R(b of current calculated Resource Block), energy Access the average covariance matrices R(b of each Resource Block more accurately), the process received for whole AF panel is established Basis；Meanwhile, AF panel parameter calculation unit 11 is chosen easier algorithm and is calculated AF panel compensating parameter W(b), and AF panel compensating parameter W(b gone out) span is between [0,1], it is ensured that and data will not be overflowed, and further ensures The accuracy of AF panel reception and the performance of whole communication network.

In sum:

The invention discloses a kind of LTE system AF panel method of reseptance and device.Based on local pilot signal to reception Signal Y carries out channel estimation, obtains channel response H, and calculates the average covariance of each Resource Block described according to channel response H Matrix R(b)；According to the described average covariance matrices R(b of Resource Block each described) calculate, obtain corresponding described in each AF panel compensating parameter W(b of Resource Block) and variance NoiseVar(b of equivalence white Gaussian noise)；Determine that described reception is believed Signal place Resource Block b to be compensated in number Y, according to the AF panel compensating parameter that described signal place to be compensated Resource Block is corresponding And described channel response H carries out signal compensation, the reception signal Y ' after being compensated W(b).Based on said method and device, energy Enough obtain average covariance matrices R(b more accurately), it is ensured that accuracy that AF panel receives and whole communication network Performance.

In this specification, each embodiment uses the mode gone forward one by one to describe, and what each embodiment stressed is and other The difference of embodiment, between each embodiment, identical similar portion sees mutually.For device disclosed in embodiment For, owing to it corresponds to the method disclosed in Example, so describe is fairly simple, relevant part sees method part and says Bright.

The method described in conjunction with the embodiments described herein or the step of algorithm can direct hardware, processor be held The software module of row, or the combination of the two implements.Software module can be placed in random access memory (RAM), internal memory, read-only deposit Reservoir (ROM), electrically programmable ROM, electrically erasable ROM, depositor, hard disk, moveable magnetic disc, CD-ROM or technology In any other form of storage medium well known in field.

Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention. Multiple amendment to these embodiments will be apparent from for those skilled in the art, as defined herein General Principle can realize without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention It is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein and features of novelty phase one The widest scope caused.

Claims (14)

1. LTE (a Long Term Evolution system, long evolving system) system interference suppression method of reseptance, its It is characterised by, including:

Carry out channel estimation based on local pilot signal docking collection of letters Y, obtain channel response H, and calculate described reception signal Y Average covariance matrices R (b) of each Resource Block of place, in the process of average covariance matrices R (b) calculating each Resource Block In, adjacent with calculated Resource Block, to have close interference Resource Block can be combined, then utilize in this combination All Resource Block calculate this and calculated average covariance matrices R (b) of Resource Block, and by non-conterminous, interference difference is special Big Resource Block forecloses, and obtains average covariance matrices R (b) of each Resource Block more accurately；

Calculate according to described average covariance matrices R (b) of Resource Block each described, obtain each described Resource Block corresponding AF panel compensating parameter W (b) and equivalence white Gaussian noise variance NoiseVar (b)；

Determine signal place to be compensated Resource Block in described reception signal Y, corresponding according to described signal place to be compensated Resource Block AF panel compensating parameter W (b) and described channel response H carry out signal compensation, the reception signal Y'(b after being compensated).

Method the most according to claim 1, it is characterised in that after the reception signal after being compensated, also include:

Choose variance NoiseVar (b) of equivalent white Gaussian noise corresponding to described signal place to be compensated Resource Block, to described Reception signal Y'(b after compensation) carry out equilibrium treatment.

Method the most according to claim 1 and 2, it is characterised in that carry out letter based on local pilot signal docking collection of letters Y Road is estimated, obtains channel response H, and calculate average covariance matrices R (b) of each Resource Block of described reception signal Y place Process includes:

Carry out channel estimation based on local pilot signal docking collection of letters Y, obtain channel response H；

The covariance matrix of each Resource Block is calculated according to described channel response H；

Judge the distance between the covariance matrix of each described Resource Block and the covariance matrix of N number of Adjacent resource block the most all Less than predeterminable range thresholding；

If it is, increase N, until the covariance matrix of described Resource Block with increase after the covariance of N number of Adjacent resource block Distance between matrix be both less than predeterminable range thresholding, determine current resource block increase with it after N number of Adjacent resource block structure The average resource set of blocks become；

If it is not, then determine the average resource set of blocks being made up of current resource block with N number of Adjacent resource block；

Each Resource Block average covariance matrices R (b) is calculated according to described average resource set of blocks.

Method the most according to claim 3, it is characterised in that at the covariance matrix of each described Resource Block of described judgement And before whether the distance between the covariance matrix of N number of Adjacent resource block is both less than predeterminable range thresholding, described in described foundation After channel response H calculates the covariance matrix of each Resource Block, also include:

The covariance matrix of Resource Block each described is smoothed in time domain.

Method the most according to claim 1 and 2, it is characterised in that carry out letter based on local pilot signal docking collection of letters Y Road is estimated, obtains channel response H, and calculate average covariance matrices R (b) of each Resource Block of described reception signal Y place Process includes:

Carry out channel estimation based on local pilot signal docking collection of letters Y, obtain channel response H；

The covariance matrix of each Resource Block is calculated according to described channel response H；

Each Resource Block average covariance matrices R (b), described average resource set of blocks is calculated according to default average resource set of blocks For for each Resource Block, carry out configuring according to the practical situation of LTE system.

Method the most according to claim 1, it is characterised in that according to the described average covariance square of Resource Block each described Battle array R (b) calculates, and the process of AF panel compensating parameter W (b) obtaining each described Resource Block corresponding including:

Described average covariance matrices R (b) is converted to

Wherein, Rb (1,1) represents the interference noise variance of reception antenna 0, Rb (1,2) expression reception antenna 0 and reception antenna 1 Interference noise covariance, Rb (2,1) represents that reception antenna 1 and the interference noise covariance of reception antenna 0, Rb (2,2) expression connect Receive the interference noise variance of antenna 1；

When Rb (1,1) is more than or equal to Rb (2,2), foundationObtain AF panel compensating parameter W (b)；

Wherein, γ, ρ are constant,

Method the most according to claim 1, it is characterised in that according to the described average covariance square of Resource Block each described Battle array R (b) calculates, and the process of AF panel compensating parameter W (b) obtaining each described Resource Block corresponding including:

Described average covariance matrices R (b) is converted to

Wherein, Rb (1,1) represents the interference noise variance of reception antenna 0, Rb (1,2) expression reception antenna 0 and reception antenna 1 Interference noise covariance, Rb (2,1) represents that reception antenna 1 and the interference noise covariance of reception antenna 0, Rb (2,2) expression connect Receive the interference noise variance of antenna 1；

When Rb (1,1) less than Rb (2,2) time, make Rb'=P Rb P, wherein,

FoundationObtain AF panel compensating parameter W (b)=P V P；

Wherein, γ, ρ are constant,

Method the most according to claim 6, it is characterised in that according to the described average covariance square of Resource Block each described Battle array R (b) calculates, and obtains the process of variance NoiseVar (b) of the equivalent white Gaussian noise of each described Resource Block corresponding Including:

According to NoiseVar (b)=Rb (2,2) (1-| ρ |²) obtain the equivalent white Gaussian noise of corresponding each described Resource Block Variance NoiseVar (b).

Method the most according to claim 7, it is characterised in that according to the described average covariance square of Resource Block each described Battle array R (b) calculates, and variance NoiseVar (b) of the equivalent white Gaussian noise obtaining each described Resource Block corresponding includes:

FoundationObtain the variance of the equivalent white Gaussian noise of each described Resource Block corresponding NoiseVar(b)。

10. a LTE system AF panel receives device, it is characterised in that including:

Covariance computing unit, for carrying out channel estimation based on local pilot signal docking collection of letters Y, obtains channel response H, And calculate average covariance matrices R (b) of each Resource Block of described reception signal Y place, calculating the average of each Resource Block During covariance matrix R (b), adjacent with calculated Resource Block, to have close interference Resource Block can be carried out group Close, then utilize all Resource Block in this combination to calculate this and calculated average covariance matrices R (b) of Resource Block, and incite somebody to action Non-conterminous, the interference king-sized Resource Block of difference forecloses, and obtains the average covariance of each Resource Block more accurately Matrix R (b)；

AF panel parameter calculation unit, based on according to each described, described average covariance matrices R (b) of Resource Block is carried out Calculate, obtain AF panel compensating parameter W (b) and variance NoiseVar of equivalence white Gaussian noise of each described Resource Block corresponding (b)；

Pre-compensation unit, is used for determining signal place to be compensated Resource Block in described reception signal Y, according to described signal to be compensated AF panel compensating parameter W (b) and described channel response H that place Resource Block is corresponding carry out signal compensation, after being compensated Receive signal Y'(b).

11. devices according to claim 10, it is characterised in that also include:

Balanced unit, for choosing the variance of equivalent white Gaussian noise corresponding to described signal place to be compensated Resource Block NoiseVar (b), the reception signal Y'(b to after described compensation) carry out equilibrium treatment.

12. according to the device described in claim 10 or 11, it is characterised in that described covariance computing unit includes:

Channel estimating unit, for carrying out channel estimation based on local pilot signal docking collection of letters Y, obtains channel response H；

Every Resource Block computing unit, for calculating the covariance matrix of each Resource Block according to described channel response H；

Frequency domain parameter estimation unit, for judging the covariance matrix of each described Resource Block and the association side of N number of Adjacent resource block Whether the distance between difference matrix is both less than predeterminable range thresholding, if it is, increase N, until the covariance of described Resource Block Distance between the covariance matrix R of matrix R and the N number of Adjacent resource block after increasing is not both less than predeterminable range thresholding, determines Current resource block increase with it after N number of Adjacent resource block constitute average resource set of blocks；If it is not, then determine by currently providing The average resource set of blocks that source block is constituted with N number of Adjacent resource block；

Concrete calculating process is: calculate the distance of its covariance matrix and the covariance matrix of adjacent N number of Resource BlockWherein | | | | for Frobenius norm, it is judged that whether above-mentioned distance is less than predeterminable range thresholding F, if It is satisfied by, then expands N, until can not meet, and export the average resource set of blocks S of this Resource Block_b, described distance threshold F root Configure according to the practical situation of LTE system；

Frequency domain averaging unit, for calculating each Resource Block average covariance matrices R (b) according to average resource set of blocks.

13. devices according to claim 12, it is characterised in that also include:

Time domain smooth unit, for being smoothed in time domain the covariance matrix of Resource Block each described.

14. devices according to claim 12, it is characterised in that also include:

Select switch K, be used for average resource set of blocks or the default average resource of selection selecting frequency domain parameter estimation unit to determine Set of blocks.