CN101577572B - Resource multiplexing method for multiple input multiple output-orthogonal frequency division multi (MIMO-OFDM) system - Google Patents
Resource multiplexing method for multiple input multiple output-orthogonal frequency division multi (MIMO-OFDM) system Download PDFInfo
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Abstract
The invention provides a resource multiplexing method for a multiple input multiple output-orthogonal frequency division multi (MIMO-OFDM) system, which comprises the following steps: a client feeds back sequence values of each sub-band in the MIMO-OFDM system and channel quality indicator (CQI) values of each space sub-channel to Node B; the Node B adds the channel quality indicator (CQI) values of each space sub-channel on each sub-band and selects and distributes a sub-band with a larger channel quality indicator (CQI) value after adding to the client; and the total multiplexing or the partial multiplexing of resources is determined to carry out on each sub-band distributed to the client according to the sequence value of the sub-band distributed to the client. The resource multiplexing method determines the sub-band distributed to user equipment (UE) according to the channel quality indicator (CQI) value, thereby reducing the complexity of the UE and being capable of optimizing the transmission performance of data streams of partial space sub-channels.
Description
Technical field
The present invention relates to a kind of resource method for using of system of broadband wireless communication, be specifically related to the resource multiplexing method in a kind of MIMO-OFDM system.
Background technology
In the prior art, improving band-limited band efficiency is the two big severe challenges that system of broadband wireless communication faces with the multipath fading that overcomes wireless channel.OFDM (Orthogonal FrequencyDivision Multiplexing; Being OFDM) technology can transmit anti-multipath effectively; Solve the anti-interference problem in the frequency selective fading channels; This technology is to utilize a plurality of subcarriers parallel, the transmission low-rate data to realize the communication of high data rate, and its technical essential is that the Channel Transmission bandwidth is divided into some subbands, on each subband, uses the subcarrier transmitting data information of several mutually orthogonals concurrently; Utilize the orthogonality of its each number of sub-carrier at receiving terminal, isolate the data message of parallel transmission.
MIMO (Multiple-Input Multiple-Out-put, promptly multichannel is advanced multichannel and gone out) technology can produce several independently parallel channels and transmit multiplex data stream simultaneously in the space, improve the transmission rate of system effectively.
Therefore, the key technology that is combined into present B3G/4G communication of OFDM technology and MIMO technology.
The frequency selectivity of wireless channel makes the different different decline of subchannel (subcarrier) experience in the ofdm system, promptly is to have different transmission qualities on the different sub carrier.
The method of in the prior art these subchannels being carried out resource allocation has two kinds:
A kind of is to these subchannel mean allocation data bit-rates, and this method need be distributed according to the most severe subcarrier of decline, will cause certain waste for the good subchannel of other channel gains like this.
Another kind is the adaptive resource distribution technique; This method is exactly according to the characteristic of each subcarrier dynamically distribute data bit and power, that is to say some data bits of overabsorption on the good subchannel of channel gain, on the serious channel of channel fading, distributes some data bits less; And on different subcarriers, select different MCS (Modulation Coding Scheme;, i.e. modulation coding mode) and improve transmission performance, this method can make system reach optimum resource allocation; But this method requires the base station must know the channel quality characteristic of each user on each subcarrier, therefore makes that the feedback overhead of broadband system is very big.
Therefore, also there is defective in prior art, awaits improving and development.
Summary of the invention
The object of the present invention is to provide the resource multiplexing method of a kind of MIMO-OFDM system, be intended to and can address the above problem, promptly is can optimize allocation of resources and can reduce the feedback overhead in the said MIMO-OFDM system.
Technical scheme of the present invention comprises:
Resource multiplexing method in a kind of MIMO-OFDM system, it may further comprise the steps:
The order value in A, the said MIMO-OFDM of the client feeds back system on each subband and the channel quality indicator (CQI) value of each spatial sub-channel are given the base station;
Addition is carried out with the channel quality indicator (CQI) value on each spatial sub-channel on said each subband in B, base station, and the allocation of subbands that the channel quality indicator (CQI) value after the selection addition is bigger is given user side;
C, to confirm on said each subband of distributing to user side, to carry out resource according to the order value on the said subband of distributing to user side all multiplexing or resource part is multiplexing.
Described resource multiplexing method, wherein, in the steps A, said channel matrix is N
R* N
TThe channel matrix H of dimension, said N
RBe the number of reception antenna in the said MIMO-OFDM system, said N
TBe the number of the transmitting antenna in the said MIMO-OFDM system, said N
R* N
TThe dimension the channel matrix H (n) of channel matrix H on the n number of sub-carrier as follows:
Described resource multiplexing method, wherein, among the said step C, it is all multiplexing that the subband that to select said order value be full rank carries out resource, selects said order value multiplexing for the subband of full rank not carries out resource part.
Resource multiplexing method in a kind of MIMO-OFDM system, it may further comprise the steps:
The channel quality indicator (CQI) value of each spatial sub-channel on A1, each subband of client feeds back is given the base station;
B1, base station calculate the number of plies that can send data according to the channel quality indicator (CQI) value of each spatial sub-channel on each subband of client feeds back;
C1, the close subband of base station selected spatial sub-channel upper signal channel quality indicator (CQI) value carry out whole resource multiplexes, and it is multiplexing to select remaining subband to carry out resource part.
Described resource multiplexing method, wherein, said user side carries out channel quality indicator (CQI) value that singular value decomposition calculates each spatial sub-channel on said each subband to feed back to said base station with channel matrix.
Resource multiplexing method in a kind of MIMO-OFDM system, it may further comprise the steps:
It is one first spatial sub-channel that the channel matrix of A2, the said MIMO-OFDM of definition system obtains the corresponding spatial sub-channel of big singular value through singular value decomposition, and the bigger allocation of subbands of base station selected first spatial sub-channel corresponding channel quality indication CQI value is given user side;
B2, base station confirm to send the number of plies of data according to the channel quality indicator (CQI) value of each spatial sub-channel on the subband of distributing to user side;
C2, select its number of plies to equal the subband of the maximum number of plies, it is all multiplexing to carry out resource, and it is multiplexing to select its number of plies to carry out resource part less than the subband of the maximum number of plies.
Resource multiplexing method in the MIMO-OFDM provided by the present invention system; Compare with the existing resources distribution method; Only confirm to distribute to the subband of UE and confirm that according to the said number of plies of sending data this subband of distributing to UE is that resource is all multiplexing or resource part is multiplexing according to said CQI value; Reduce the complexity of UE, and can optimize the transmission performance of data flow on the part spatial sub-channel, and; The number of plies that resource multiplexing method in the MIMO-OFDM provided by the invention system utilizes Node B to calculate can to send data and the feedback that do not need UE reduce the feedback overhead of UE.
Description of drawings
Fig. 1 is a MIMO-OFDM system principle sketch map of the present invention.
Fig. 2 is a data resource fractional reuse sketch map on the different spaces subchannel provided by the invention
Fig. 3 is for adopting resource multiplexing method of the present invention and resource multiplexing Block Error Rate performance curve sketch map fully.
Embodiment
Through accompanying drawing and instance the present invention is set forth in detail below.
The present invention provides the resource multiplexing method of one first embodiment and combines the explanation of a MIMO-OFDM system following:
See also Fig. 1, be the principle schematic of said MIMO-OFDM system.
Said MIMO-OFDM system is that a number of transmit antennas is N
T, reception antenna is N
RThe MIMO-OFDM system, on the n number of sub-carrier, the channel matrix of said MIMO-OFDM system is a N
R* N
TDimension channel matrix H (n).
Said N
R* N
TDimension channel matrix H (n) is:
The maximum space subchannel number that is appreciated that said MIMO-OFDM system is min (N
T, N
R) or by said N
R* N
TDimension channel matrix H (n) is carried out the non-zero singular value number that singular value decomposition obtains.
The step of the method for work of said MIMO-OFDM system comprises the steps one, step 2, step 3, step 4 and step 5:
The method of said modulation can be quadrature (four phases) phase shift keying QPSK, 16-quadrature amplitude modulation (QAM) and 64-quadrature amplitude modulation (QAM) etc.Each traffic flow information becomes symbol waiting for transmission through chnnel coding, and continuing becomes the frequency domain modulation symbol through said modulation.
The broadband of whole system is divided into a plurality of subbands, and each subband is made up of the N number of sub-carrier, and each traffic flow information is mapped to through the symbol (frequency domain symbol) after chnnel coding and the modulation on the N number of sub-carrier of said subband to transmit.
Order (rank) information that step 2 user side UE (User Equipment) feeds back on each subband is given base station (Node B), said base station according to the order information on each subband of said UE feedback to confirm its corresponding free space subchannel number (being the available number of plies or the number of plies that can send data) V;
Said V is less than or equal to min (N
T, N
R), and said number of layers V is greater than or equal to N.
N data flow point of said each subband do not mapped on the different layer on the spatial domain to carry out resource multiplex.
The said mapping relations that mapped to layer by subcarrier can be realized by the layer mapping block that 3GPP TS36.211 provides.
Data on step 3 V layer continue to map on its corresponding transmitting antenna through precoding (Precoding).Particularly, with its corresponding precoding weighted vector of the data on the different layers multiply each other, addition, carry out resource mapping then.
Its corresponding precoding weighted vector of data on the said different layers multiplies each other, and the data on being about to every layer multiply each other with U matrix column vector respectively, and said U matrix is decomposed through singular value decomposition (SVD) by said channel matrix H and obtains.
The step 4 base station receives the channel quality indicator (CQI) value on each spatial sub-channel on each subband of UE feedback and carries out resource allocation according to the channel quality indicator (CQI) value on each spatial sub-channel on each subband of said UE feedback, and selects to distribute to the subband of UE.
In real system,, can send independent data stream with the maximum space subchannel number on some subbands because the channel response between each spatial sub-channel is variant; The number that is data flow equates with the maximum space sub-channel data; Be all resource multiplexes of what is called, perhaps full rank (rank) is sent, and other subbands; It only can be to send data flow less than the maximum space subchannel number; Be the part resource multiplex, some the spatial sub-channel channel condition on this part subband is too poor and can't transmit data, the multiplexing method of promptly so-called resource part.
See also Fig. 2, be data resource fractional reuse sketch map on the different spaces subchannel provided by the invention.
Resource multiplexing method in the MIMO-OFDM system of the resource allocation methods employing first embodiment of the present invention of said step 4, it comprises the steps (1) (2) (3) (4):
(1) UE (User Equipment, user side) carries out singular value decomposition according to channel matrix H (n) and calculates order (rank) value and the channel quality indicator (CQI) value of each spatial sub-channel on each subband on each subband;
(2) order (rank) value on said each subband of UE feedback and the channel quality indicator (CQI) value information of each spatial sub-channel are given Node B;
(3) Node B carries out addition with the channel quality indicator (CQI) value on each spatial sub-channel on said each subband, and the allocation of subbands that the channel quality indicator (CQI) value after the selection addition is bigger is given UE;
(4) confirm to carry out whole resource multiplexes or part resource multiplex according to the order on the subband of the said UE of distributing to (rank) value.Particularly, it is all multiplexing that the subband that to select said order value be full rank carries out resource, and said order value is multiplexing for the subband of full rank not carries out resource part.
The circulation that stopped before said adding is inserts protection at interval.
See also Fig. 3, the resource part multiplexing method that adopts first embodiment of the invention for said MIMO-OFDM system with adopt resource multiplexing Block Error Rate performance curve fully.Block Error Rate to data flow 1 and data flow 2 measures, and whole multiplexing Block Error Rates are low than adopting resource to adopt the multiplexing Block Error Rate of resource part, promptly adopts the transmission performance height of the data flow of the multiplexing MIMO-OFDM system of resource part.
Resource multiplexing method in a kind of MIMO-OFDM system of this first embodiment; Compare with the existing resources distribution method; Only confirm to distribute to the subband of UE and confirm that according to the said number of plies of sending data this subband of distributing to UE is that resource is all multiplexing or resource part is multiplexing according to said channel quality indicator (CQI) value; Reduce the complexity of UE, and can optimize the transmission performance of data flow on the part spatial sub-channel.
The present invention also provides the resource multiplexing method of one second embodiment, and it combines the explanation of said MIMO-OFDM system following:
The step 1 information source produces N independent data stream and passes through chnnel coding and modulation respectively; Said N is greater than or equal to 1 integer and smaller or equal to min (N
T, N
R);
Order (rank) information is given the base station on each subband of step 2 UE feedback, said base station according to the order information on each subband of said UE feedback to confirm its corresponding free space subchannel number (be available or can send the number of plies of data) V;
Said V is less than or equal to min (N
T, N
R), and said number of layers V is greater than or equal to N.A said N independent data stream to the layer mapping relations can for 3GPP TS36.211 provide the layer mapping block.
Data on step 3 V layer continue to map on its corresponding transmitting antenna through precoding (Precoding).Particularly, its corresponding precoding weighted vector of the data on the different layers is multiplied each other, carry out the resource mapping then.
It promptly is that data with on every layer multiply each other with U matrix column vector respectively that its corresponding precoding weighted vector of data on the said different layers multiplies each other.
Said U matrix is obtained through singular value decomposition (SVD) by channel matrix.
Step 4 Node B receives the channel quality indicator (CQI) value on each spatial sub-channel on each subband of UE feedback and carries out resource allocation according to the channel quality indicator (CQI) value on each spatial sub-channel on each subband of said UE feedback, and the subband of selecting to distribute to UE is with resource multiplex.In the time of resource multiplex, can adopt centralized resources to distribute and also can adopt distributed resource allocation.
Particularly, the resource multiplexing method in a kind of MIMO-OFDM system that resource allocation methods adopts that second embodiment of the invention provides in this step 4, it comprises following comprising the steps (1) (2) (3):
(1) the channel quality indicator (CQI) value of each spatial sub-channel on each subband of UE feedback is given Node B;
(2) Node B calculates the space number of plies that can send data according to the channel quality indicator (CQI) value of each spatial sub-channel on each subband of UE feedback;
(3) select the close subband of each spatial sub-channel upper signal channel quality indicator (CQI) value to carry out whole resource multiplexes, it is multiplexing that the other bigger subband of selection spatial sub-channel upper signal channel quality indicator (CQI) value difference carries out resource part.
Resource multiplexing method in a kind of MIMO-OFDM system that this second embodiment provides is compared first embodiment, utilizes Node B to calculate the number of plies that can send data, does not need the said number of plies of sending data of UE feedback, further reduces the feedback overhead of UE.
The present invention also provides the resource multiplexing method in a kind of MIMO-OFDM of the money of one the 3rd embodiment system, and combines the explanation of said MIMO-OFDM system following:
The step of the method for work of said MIMO-OFDM system is:
The step 1 information source produces N independent data stream and passes through chnnel coding and modulation respectively independently; System resource is divided into N different subband parallel transmission, carries out chnnel coding and modulation respectively; Said N is greater than or equal to 1 integer and smaller or equal to min (N
T, N
R);
Order (rank) information is given transmitting terminal on each subband of step 2 UE feedback, said transmitting terminal according to the order information on each subband of said UE feedback to confirm its corresponding free space subchannel number (be available or can send the number of plies of data) V;
Said V is less than or equal to min (N
τ, N
R), and said number of layers V is greater than or equal to N.A said N independent data stream to the layer mapping relations can for 3GPP TS36.211 provide the layer mapping block.
Data on step 3 V layer continue to map on its corresponding transmitting antenna through precoding (Precoding).Particularly, its corresponding precoding weighted vector of the data on the different layers is multiplied each other, carry out the resource mapping then.
It promptly is that data with on every layer multiply each other with U matrix column vector respectively that its corresponding precoding weighted vector of data on the said different layers multiplies each other.
Said U matrix is obtained through singular value decomposition (SVD) by channel matrix.
Step 4 Node B receives the channel quality indicator (CQI) value on each spatial sub-channel on each subband of UE feedback and carries out resource allocation according to the channel quality indicator (CQI) value on each spatial sub-channel on each subband of said UE feedback, and selects to distribute to the subband of UE.
A kind of resource multiplexing method that the resource allocation methods of this step 4 adopts third embodiment of the invention to provide, it comprises the steps (1) (2) (3):
(1) definition channel matrix H (n) is first spatial sub-channel through the spatial sub-channel that singular value decomposition obtains big singular value correspondence, selects the bigger allocation of subbands of the first spatial sub-channel CQI to give UE;
(2), confirm to send the number of plies (rank) of data according to the CQI value of each spatial sub-channel on the subband of distributing to UE;
(3) equal on the subband (promptly being the subband of full rank) of the maximum number of plies (rank) for its number of plies, it is all multiplexing to carry out resource, multiplexing less than carrying out resource part on the subband of the maximum number of plies (promptly not the subband of full rank) for its number of plies.
It is understandable that the resource multiplexing method that third embodiment of the invention provides can reach effect of the present invention equally.
Should be noted that above-mentioned description to each preferred embodiment of the present invention is comparatively detailed, can not therefore think the restriction to scope of patent protection of the present invention, scope of patent protection of the present invention should be as the criterion with accompanying claims.
Claims (5)
1. the resource multiplexing method in the MIMO-OFDM system, it may further comprise the steps:
A, user side carry out singular value decomposition with channel matrix and calculate order value and the channel quality indicator (CQI) value of each spatial sub-channel on each subband on said each subband, and order value and the channel quality indicator (CQI) value of each spatial sub-channel fed back on each subband are given the base station;
Addition is carried out with the channel quality indicator (CQI) value on each spatial sub-channel on said each subband in B, base station, and the allocation of subbands that the channel quality indicator (CQI) value after the selection addition is bigger is given user side;
C, to confirm on said each subband of distributing to user side, to carry out resource according to the order value on the said subband of distributing to user side all multiplexing or resource part is multiplexing.
2. resource multiplexing method as claimed in claim 1 is characterized in that, said channel matrix is N
R* N
TThe channel matrix H of dimension, said N
RBe the number of reception antenna in the said MIMO-OFDM system, said N
TBe the number of the transmitting antenna in the said MIMO-OFDM system, said N
R* N
TThe dimension the channel matrix H (n) of channel matrix H on the n number of sub-carrier as follows:
3. resource multiplexing method as claimed in claim 1 is characterized in that, among the said step C, it is all multiplexing that the subband that to select said order value be full rank carries out resource, selects said order value multiplexing for the subband of full rank not carries out resource part.
4. the resource multiplexing method in the MIMO-OFDM system, it may further comprise the steps:
A1, user side carry out the channel quality indicator (CQI) value that singular value decomposition calculates each spatial sub-channel on each subband with channel matrix, and the channel quality indicator (CQI) value of feeding back each spatial sub-channel on each subband is given the base station;
B1, base station calculate the number of plies that can send data according to the channel quality indicator (CQI) value of each spatial sub-channel on each subband of client feeds back;
C1, the close subband of base station selected spatial sub-channel upper signal channel quality indicator (CQI) value carry out whole resource multiplexes, and it is multiplexing to select remaining subband to carry out resource part.
5. the resource multiplexing method in the MIMO-OFDM system, it may further comprise the steps:
It is one first spatial sub-channel that the channel matrix of A2, the said MIMO-OFDM of definition system obtains the corresponding spatial sub-channel of big singular value through singular value decomposition, and the bigger allocation of subbands of base station selected first spatial sub-channel corresponding channel quality indication CQI value is given user side;
B2, base station confirm to send the number of plies of data according to the channel quality indicator (CQI) value of each spatial sub-channel on the subband of distributing to user side;
C2, select its number of plies to equal the subband of the maximum number of plies, it is all multiplexing to carry out resource, and it is multiplexing to select its number of plies to carry out resource part less than the subband of the maximum number of plies.
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| EP2506451B1 (en) * | 2009-11-24 | 2016-05-04 | Electronics and Telecommunications Research Institute | Method for transmitting multiple frames using group control information in a mu-mimo based wireless communication system |
| CN102891816B (en) * | 2012-10-25 | 2016-08-03 | 复旦大学 | A kind of uncoupling Forecasting Methodology based on MIMO-OFDM correlated channels |
| CN107733559B (en) * | 2016-08-12 | 2021-06-22 | 北京华为数字技术有限公司 | Data transmission method, sending equipment and receiving equipment |
| US10925009B2 (en) * | 2019-05-27 | 2021-02-16 | Apple Inc. | Dynamic processing resource allocation across multiple carriers |
| CN111866932B (en) * | 2020-08-07 | 2021-03-12 | 北京邮电大学 | Network measurement method and device and electronic equipment |
| CN113890550B (en) * | 2021-08-17 | 2024-05-24 | 国网江苏省电力有限公司泰州供电分公司 | Power grid communication noise suppression method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1946000A (en) * | 2005-10-05 | 2007-04-11 | 中兴通讯股份有限公司 | Method and system for realizing down link self adaption in multiple users multiple input and multiple output system |
| WO2007112371A1 (en) * | 2006-03-27 | 2007-10-04 | Qualcomm Incorporated | Feedback of channel state information for mimo and subband scheduling in a wireless communication system |
| CN101120608A (en) * | 2004-12-22 | 2008-02-06 | 高通股份有限公司 | Minimizing feedback by sending a quality indicator for a non-restrictive reuse set and a vectored quality indicator for other reuse sets |
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| CN101120608A (en) * | 2004-12-22 | 2008-02-06 | 高通股份有限公司 | Minimizing feedback by sending a quality indicator for a non-restrictive reuse set and a vectored quality indicator for other reuse sets |
| CN1946000A (en) * | 2005-10-05 | 2007-04-11 | 中兴通讯股份有限公司 | Method and system for realizing down link self adaption in multiple users multiple input and multiple output system |
| WO2007112371A1 (en) * | 2006-03-27 | 2007-10-04 | Qualcomm Incorporated | Feedback of channel state information for mimo and subband scheduling in a wireless communication system |
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Application publication date: 20091111 Assignee: SANECHIPS TECHNOLOGY Co.,Ltd. Assignor: ZTE Corp. Contract record no.: 2015440020319 Denomination of invention: Resource multiplexing method for multiple input multiple output-orthogonal frequency division multi (MIMO-OFDM) system Granted publication date: 20121205 License type: Common License Record date: 20151123 |
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Effective date of registration: 20180703 Address after: California, USA Patentee after: Global innovation polymerization LLC Address before: 518057 Nanshan District high tech Industrial Park, Shenzhen, Guangdong, Ministry of justice, Zhongxing Road, South China road. Patentee before: ZTE Corp. |
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