CN109660266B - Signal processing method and device - Google Patents
Signal processing method and device Download PDFInfo
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- CN109660266B CN109660266B CN201710943389.7A CN201710943389A CN109660266B CN 109660266 B CN109660266 B CN 109660266B CN 201710943389 A CN201710943389 A CN 201710943389A CN 109660266 B CN109660266 B CN 109660266B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
- H04B1/0028—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at baseband stage
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
- H04B1/0028—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at baseband stage
- H04B1/0035—Channel filtering, i.e. selecting a frequency channel within a software radio system
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- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0058—Allocation criteria
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Abstract
The embodiment of the invention provides a signal processing method and a signal processing device, wherein the method comprises the following steps: acquiring frequency domain data of a baseband signal; converting the frequency domain data to obtain original time domain data; generating prefix information and suffix information according to the original time domain data; and adding prefix information and suffix information in the original time domain data to generate target time domain data. The embodiment of the invention adds the prefix information and the suffix information in the baseband signal, thereby enabling the out-of-band noise floor of the baseband signal to meet the corresponding inhibition requirement without adding an FIR filter for filtering, saving the resources occupied by the FIR filter originally and improving the frequency spectrum utilization rate.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a signal processing method and a signal processing apparatus.
Background
In an existing LTE (Long Term Evolution) system, a physical layer generates a baseband signal by performing IFFT (Inverse Fast Fourier Transform) processing on frequency domain data generated according to an LTE standard to obtain corresponding time domain data, and then intercepting a certain length of data from behind the time domain data to form a piece of symbol data with a cyclic prefix before the time domain data.
The baseband signals generated by the method all have a high out-of-band noise floor, and the existing method is to add an FIR (Finite Impulse Response) filter to the signal with a bandwidth of 10% reserved, so as to reduce the out-of-band noise floor, but also result in a spectrum utilization rate of only 90% (as shown in fig. 1, a spectrum diagram of an 18MHz signal generated in the prior art and having a 20MHz channel bandwidth subcarrier of 15KHz is shown). The bandwidth in The LTE system is within 20 megabits, and in The future 5G (The Fifth Generation mobile communication technology) signals, The bandwidth increases to over 100 megabits, and if The baseband signals are still generated by The conventional method, not only is The bandwidth resource seriously wasted, but also The resource overhead required by adding The filter is very large, and almost impossible.
Disclosure of Invention
In view of the foregoing, embodiments of the present invention are provided to provide a signal processing method and a signal processing apparatus thereof, which overcome the problems that the out-of-band noise floor of the baseband signal is high and a filter needs to be added to improve the spectrum utilization.
In order to solve the above problem, an embodiment of the present invention discloses a signal processing method, including:
acquiring frequency domain data of a baseband signal;
converting the frequency domain data to obtain original time domain data;
generating prefix information and suffix information according to the original time domain data;
and adding prefix information and suffix information in the original time domain data to generate target time domain data.
Preferably, the original time domain data includes: first symbol data located at the head of each slot; the prefix information includes: first symbol original prefix information and first symbol target prefix information; the suffix information includes: first symbol suffix information; the step of generating prefix information and suffix information according to the original time domain data includes:
acquiring data with preset length at the head of the first symbol data, and generating first symbol suffix information;
acquiring data with preset length at the tail part of the first symbol data to generate original prefix information of the first symbol;
and combining the first symbol original prefix information with preset data to generate the first symbol target prefix information.
Preferably, the original time domain data further includes: one or more second symbol data located after one of the first symbol data; the prefix information further includes: second symbol prefix information; the suffix information further includes: second symbol suffix information; the step of generating prefix information and suffix information according to the original time domain data further includes:
acquiring data with preset length at the head of the second symbol data, and generating second symbol suffix information;
and acquiring data with preset length at the tail part of the second symbol data to generate the second symbol prefix information.
Preferably, the step of adding prefix information and suffix information to the original time domain data to generate target time domain data includes:
adding the first symbol suffix information at the tail of the first symbol data;
adding the first symbol target prefix information to the first symbol data header;
adding the second symbol suffix information to the end of the second symbol data;
and adding the second symbol prefix information in the second symbol data head.
Preferably, the step of adding prefix information and suffix information to the original time domain data to generate the target time domain data further includes:
and performing roll-off on the prefix information and the suffix information by adopting a preset function or a preset parameter.
According to another aspect of the present invention, there is also disclosed a signal processing apparatus comprising:
the acquisition module is used for acquiring frequency domain data of the baseband signal;
the conversion module is used for converting the frequency domain data to obtain original time domain data;
a generating module, configured to generate prefix information and suffix information according to the original time domain data;
and the adding module is used for adding prefix information and suffix information in the original time domain data to generate target time domain data.
Preferably, the original time domain data includes: first symbol data located at the head of each slot; the prefix information includes: first symbol original prefix information and first symbol target prefix information; the suffix information includes: first symbol suffix information; the generation module comprises:
a first suffix unit, configured to obtain data with a preset length at the head of the first symbol data, and generate the first symbol suffix information;
a first original prefix unit, configured to obtain data with a preset length at the tail of the first symbol data, and generate first symbol original prefix information;
and the first target prefix unit is used for combining the first symbol original prefix information with preset data to generate the first symbol target prefix information.
Preferably, the original time domain data further includes: one or more second symbol data located after one of the first symbol data; the prefix information further includes: second symbol prefix information; the suffix information further includes: second symbol suffix information; the generation module further comprises:
the second suffix unit is used for acquiring data with preset length at the head of the second symbol data and generating second symbol suffix information;
and the second prefix unit is used for acquiring data with a preset length at the tail part of the second symbol data and generating the second symbol prefix information.
Preferably, the adding module comprises:
a first suffix adding unit configured to add the first symbol suffix information to an end of the first symbol data;
a first prefix adding unit configured to add the first symbol target prefix information to the first symbol data header;
a second suffix adding unit operable to add the second symbol suffix information to a tail of the second symbol data;
a second prefix adding unit, configured to add the second symbol prefix information to the second symbol data header.
Preferably, the apparatus further comprises:
and the adding module is used for performing roll-off on the prefix information and the suffix information by adopting a preset function or a preset parameter.
The embodiment of the invention has the following advantages: acquiring frequency domain data of a baseband signal; performing mathematical transformation and adoption on the frequency domain data to obtain original time domain data; prefix information and suffix information can be generated according to the original time domain data; and adding prefix information and suffix information in the original time domain data to generate target time domain data. By the method, the prefix information and the suffix information are added into the baseband signal, so that the out-of-band noise floor of the baseband signal meets the corresponding inhibition requirement, an FIR filter is not required to be added for filtering, the resources occupied by the FIR filter originally are saved, the frequency spectrum utilization rate is improved, and meanwhile, compared with the existing time domain data structure, the time domain data structure of the scheme is not changed, the demodulation of the terminal is not influenced, and the terminal for receiving the baseband signal is not required to be changed.
Drawings
FIG. 1 is a spectral diagram of a baseband signal generated using prior art techniques;
fig. 2 is a flow chart of the steps of an embodiment 1 of a signal processing method of the present invention;
fig. 3 is a flow chart of the steps of a signal processing method embodiment 2 of the present invention;
FIG. 4 is a target time domain data spectrogram of an example of a signal processing method of the present invention;
fig. 5 is a block diagram of a signal processing apparatus according to embodiment 1 of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 2, a flowchart of steps of embodiment 1 of the signal processing method of the present invention is shown, which may specifically include the following steps:
the frequency domain data may be formed by generating a plurality of frequency domain data points by using an LTE standard, a 5G NR (New Radio, New air interface) standard, or another method for acquiring frequency domain data of the baseband signal.
102, converting the frequency domain data to obtain original time domain data;
the original time domain data can be obtained by performing mathematical transformation (such as IFFT) on the frequency domain data by using an existing mathematical method.
103, generating prefix information and suffix information according to the original time domain data;
the original time domain data includes one or more time slots, each time slot includes a plurality of valid data, and the length of each valid data is consistent, that is, the number of data points included in each valid data is the same. And generating corresponding prefix information and suffix information according to a part of data points in each effective data.
And 104, adding prefix information and suffix information into the original time domain data to generate target time domain data.
The original time domain data comprises a plurality of effective data, and prefix information can be added at the head of each effective data, and suffix information can be added at the tail of each effective data, so that target time domain data is generated.
In the embodiment of the invention, frequency domain data of a baseband signal is obtained; performing mathematical transformation and adoption on the frequency domain data to obtain original time domain data; prefix information and suffix information can be generated according to the original time domain data; and adding prefix information and suffix information in the original time domain data to generate target time domain data. By the method, the prefix information and the suffix information are added into the baseband signal, so that the out-of-band noise floor of the baseband signal meets the corresponding inhibition requirement, an FIR filter is not required to be added for filtering, the resources occupied by the FIR filter originally are saved, the frequency spectrum utilization rate is improved, and meanwhile, compared with the existing time domain data structure, the time domain data structure of the scheme is not changed, the demodulation of the terminal is not influenced, and the terminal for receiving the baseband signal is not required to be changed.
Referring to fig. 3, a flowchart of steps of embodiment 2 of the signal processing method of the present invention is shown, which may specifically include the following steps:
the frequency domain data may be generated by using an LTE standard, or a 5G NR (New Radio, New air interface) standard, or another method for acquiring frequency domain data of the baseband signal.
For example: for a baseband signal with a bandwidth of 100M, each frame has 10ms, each frame has 20 slots, each slot has 14 symbols, and 4096 frequency-domain data points are generated for each symbol according to the 5G NR standard.
the frequency domain data can be mathematically transformed by the existing mathematical method to obtain the original time domain data.
Specifically, the method of mathematical transformation may include processing the frequency domain data using IFFT to obtain a plurality of time domain data points, and composing the original time domain data.
For example: for a 5G baseband signal with a bandwidth of 100M, a sampling rate of 122.88MSPS (Million Samples Per Second, sampled millions of times Per Second), a subcarrier spacing of 30KHz (Kilo Hertz ), 10ms (milliseconds) Per frame, 20 slots Per frame, and 14 symbols Per slot, IFFT processing frequency-domain data generated according to the 5G NR standard to generate time-domain data points, where the number of time-domain data points is equal to the sampling rate divided by the subcarrier spacing, i.e., 4096 time-domain data points, to constitute time-domain data.
the original time domain data may include one or more frame data, one frame data may include one or more subframe data, one subframe data may include one or more slots, each slot may include a plurality of valid data, and each valid data has a same length, i.e., each valid data includes the same number of data points. And generating corresponding prefix information and suffix information according to a part of data points in each effective data.
The plurality of valid data in the original time domain data may be divided into first symbol data and second symbol data, wherein the first symbol data is located at the head of each slot, and one or more second symbol data are located after one of the first symbol data.
In this embodiment of the present invention, the step 203 may specifically include the following sub-steps:
a substep S11, obtaining data with a preset length at the head of the first symbol data, and generating the first symbol suffix information;
and intercepting data with the length of a preset length from the head of the first symbol data to generate first symbol suffix information.
For example: for a 5G baseband signal with a bandwidth of 100M, the sampling rate is 122.88MSPS (Million Samples Per Second, sampled millions of times Per Second), the subcarrier spacing is 30KHz (Kilo Hertz), and the preset length may be 144, i.e. the first symbol suffix information may include 114 time-domain data points.
Substep S12, obtaining data with preset length at the tail of the first symbol data, and generating the original prefix information of the first symbol;
and intercepting data with the length of a preset length from the tail part of the first symbol data to generate the original prefix information of the first symbol.
Substep S13, combining the first symbol original prefix information with preset data to generate the first symbol target prefix information;
and combining the first symbol original prefix information with preset data to generate the first symbol target prefix information, wherein the preset data can be a plurality of 0 s. For example: for a 5G baseband signal with a bandwidth of 100M, the sampling rate is 122.88MSPS (Million Samples Per Second, sampled millions of times Per Second), the subcarrier spacing is 30KHz (Kilo Hertz), and the preset data may be 64 0 s.
A substep S14, obtaining data with a preset length at the head of the second symbol data, and generating the second symbol suffix information;
and intercepting data with the length of a preset length from the head of the second symbol data to generate second symbol suffix information.
And a substep S15, acquiring data with a preset length at the tail of the second symbol data, and generating the second symbol prefix information.
And intercepting data with the length of a preset length from the tail part of the second symbol data to generate second symbol prefix information.
The original time domain data comprises a plurality of effective data, prefix information can be added at the head of each effective data, and postfix information is added at the tail of each effective data, so as to generate target time domain data, wherein the effective data can be divided into first symbol data and second symbol data, the first symbol data is positioned at the head of each time slot, and one or more second symbol data is positioned after one first symbol data.
In this embodiment of the present invention, the step 203 may specifically include the following sub-steps:
a substep S21 of adding the first symbol suffix information to the end of the first symbol data;
a substep S22 of adding the first symbol target prefix information to the first symbol data header;
a substep S23 of adding the second symbol suffix information to the end of the second symbol data;
and a substep S24 of adding the second symbol prefix information in the second symbol data header.
Preferably, a preset function or a preset parameter may be adopted to roll off the prefix information and the suffix information;
a preset function (such as a raised cosine function) can be adopted to roll off the prefix information and the suffix information to 0 in amplitude; or a table is made by adopting preset parameters, and the parameters in the table are multiplied by the prefix information and the suffix information to realize that the prefix information and the suffix information roll down to 0 in amplitude.
Preferably, the present embodiment can be implemented by a DSP (Digital Signal Processing), and can also be implemented by a Field-Programmable Gate Array (FPGA).
Preferably, the present embodiment is applicable to signals having a bandwidth of 10M to 400M.
In the embodiment of the invention, frequency domain data of a baseband signal is obtained; performing mathematical transformation and adoption on the frequency domain data to obtain original time domain data, wherein the original data comprises first symbol data and second symbol data; prefix information and suffix information can be generated according to the original time domain data; and performing roll-off on the prefix information and the suffix information by adopting a preset function or a preset parameter, and adding the prefix information and the suffix information into the original time domain data to generate target time domain data. The method adds prefix information and suffix information into the baseband signal, and the amplitude and phase of the first symbol data and the second symbol data and the amplitude and phase of the data between the second symbol data and the second symbol are close, so that the out-of-band noise floor of the baseband signal meets the corresponding inhibition requirement, a FIR filter is not required to be added for filtering, the resources occupied by the FIR filter originally are saved, the frequency spectrum utilization rate is improved, and meanwhile, compared with the existing time domain data structure, the time domain data structure of the scheme is not changed, the demodulation of the terminal is not influenced, and the terminal for receiving the baseband signal is not required to be changed.
In order that those skilled in the art will better understand the embodiments of the present invention, a specific embodiment will be described below.
It should be noted that, in the prior art, a 5G new air interface signal with a bandwidth of 100M has a subcarrier interval of 30KHz, and each frame is 10ms long according to a sampling rate of 122.88MSPS, each frame has 20 slots, each slot has 0.5ms, and each slot has 14 symbols. The FFT (fast fourier Transform) Transform is performed on the signal, and the number of FFT points is 4096, that is, the number of effective time domain data points per symbol is 4096. Each frame may include 1228800 time domain data points, that is, each time slot has 61440 time domain data points, the length of the time domain data of the first symbol is 352+4096 ═ 4448, and the length of the time domain data of the other 13 symbols is 288+4096 ═ 4384, so that in order to make the terminal receiving the baseband signal generated by the present scheme not need to change, the data length of the target time domain data of the present scheme also needs to satisfy: the length of the first symbol time domain data is 4448, the lengths of the other 13 symbol time domain data are 4384, the length of the suffix information of the first symbol time domain data, the length of the prefix information and the length of the suffix information of the other 13 symbol time domain data are all the same, and it can be obtained that the length of the prefix information of the first symbol time domain data is 208, and the lengths of the suffix information of the first symbol time domain data, the length of the prefix information and the length of the suffix information of the other 13 symbol time domain data are all 144.
The following will specifically describe this embodiment by taking a 5G new air interface signal with a bandwidth of 100M as an example:
and generating frequency domain data according to the 5G new air interface standard. The frequency domain data corresponding to one slot will be specifically described below.
The frequency domain data for one time slot includes 57344 frequency domain data points, and one time slot includes 14 symbols, and the frequency domain data for each symbol has the same length, i.e., 4096 frequency domain data points are for the frequency domain data for each symbol.
Performing IFFT on the frequency domain data corresponding to one time slot to obtain original time domain data corresponding to the time slot, wherein the number of data points of the original time domain data is the same as that of the frequency domain data, namely the length of the original time domain data is the same as that of the frequency domain data.
The original time domain data includes first symbol data located at a head of the original time domain data, and thirteen second symbol data following the first symbol data.
Acquiring 144 time domain data points of the first symbol data header, and generating the first symbol suffix information;
acquiring 144 time domain data points at the tail of the first symbol data to generate original prefix information of the first symbol;
acquiring 144 time-domain data points of the second symbol data header, and generating the second symbol suffix information;
and acquiring 144 time-domain data points at the tail part of the second symbol data to generate the second symbol prefix information.
And rolling down the amplitude of the first symbol suffix information, the first symbol original prefix information, the second symbol suffix information and the second symbol prefix information to 0 by adopting a raised cosine function.
For example, this can be achieved by:
xcp1＝x(3953:4096).*(1+cos(2*pi*(144:287)/288))/2，
roll-off the first symbol original prefix information or the second symbol prefix information to 0 in amplitude; wherein pi is a circumference ratio, cos is a cosine function, x is first symbol data or second symbol data, and xcp1 is prefix information obtained by roll-off of the first symbol original prefix information or the second symbol prefix information to 0 in amplitude.
Can be obtained by:
xcp2＝x(1:144).*(1+cos(2*pi*(1:144)/288))/2
and rolling down the amplitude of the first symbol suffix information and the second symbol suffix information to 0, wherein x is the original time domain data, and xcp2 is the suffix information obtained by rolling down the amplitude of the first symbol suffix information or the second symbol suffix information to 0.
Preferably, the first symbol original prefix information is combined with preset data, 64 0 s are added to the first symbol original prefix information, and the first symbol target prefix information is generated, so that the length of the first symbol target prefix information is 208;
can be obtained by:
x1＝[xcp1，x，xcp2]
adding prefix information and suffix information into the original starting data to obtain target time domain data, wherein x1 is the target time domain data.
Specifically, the first symbol suffix information is added to the tail of the first symbol data; adding the first symbol target prefix information to the first symbol data header; adding the second symbol suffix information to the end of the second symbol data; and adding the second symbol prefix information to the head of the second symbol data to obtain target time domain data.
Preferably, preset parameters may also be used to roll off in amplitude for the prefix information and the suffix information.
Since the windowing roll-off parameters WCP1 ═ 1+ cos (2 × pi (144:287)/288))/2 and WCP2 ═ 1+ cos (2 × pi (1:144)/288))/2 are a fixed set of constants for the first symbol data and the second symbol data, a table can be built using the constants, and in the implementation of the scheme, the roll-off is realized by means of table lookup without calculation each time.
When the prefix information and the suffix information are rolled down to 0 in amplitude, the prefix information and the suffix information after being rolled down to 0 in amplitude can be obtained by multiplying the cyclic prefix information and the cyclic prefix information by looking up the values of the arrays WCP1 and WCP2 in the table.
Preferably, the following formula can be used for multiplication:
xcp1＝x(3953:4096).*WCP1
xcp2＝x(1:144).*WCP2
wherein pi is a circumference ratio, cos is a cosine function, x is first symbol data or second symbol data, xcp1 is prefix information obtained by roll-off of first symbol original prefix information or second symbol prefix information to 0 in amplitude, and xcp2 is suffix information obtained by roll-off of first symbol suffix information or second symbol suffix information to 0 in amplitude.
In the generation of the target time domain data in this embodiment, compared with the time domain data generated in the prior art, the whole data frame structure is not changed, the demodulation of the terminal is not affected, and the terminal for receiving the target time domain data generated in this embodiment does not need to be changed.
Fig. 4 shows a target time domain data spectrogram of an example of a signal processing method of the present invention.
Fig. 4 is a frequency domain diagram of a baseband signal with a frequency spectrum utilization rate of 98% at a sub-carrier interval of 30KHz in a bandwidth of 100MHz, and the frequency spectrum utilization rate of target time domain data generated in this example reaches 98%.
It should be noted that, for simplicity of description, the method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the illustrated order of acts, as some steps may occur in other orders or concurrently in accordance with the embodiments of the present invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the invention.
Referring to fig. 5, a block diagram of a signal processing apparatus according to an embodiment of the present invention is shown, and may specifically include the following modules:
an obtaining module 301, configured to obtain frequency domain data of a baseband signal;
a conversion module 302, configured to convert the frequency domain data to obtain original time domain data;
a generating module 303, configured to generate prefix information and suffix information according to the original time domain data;
an adding module 304, configured to add prefix information and suffix information to the original time domain data to generate target time domain data.
In a preferred embodiment of the present invention, the original time domain data may include: first symbol data located at the head of each slot; the prefix information may include: first symbol original prefix information and first symbol target prefix information; the suffix information may include: first symbol suffix information; the generating module 303 may include:
a first suffix unit, configured to obtain data with a preset length at the head of the first symbol data, and generate the first symbol suffix information;
a first original prefix unit, configured to obtain data with a preset length at the tail of the first symbol data, and generate first symbol original prefix information;
and the first target prefix unit is used for combining the first symbol original prefix information with the added preset data to generate the first symbol target prefix information.
In a preferred embodiment of the present invention, the original time domain data further includes: one or more second symbol data located at an end of one of the first symbol data; the prefix information further includes: second symbol prefix information; the suffix information further includes: second symbol suffix information; the generating module 303 may further include:
the second suffix unit is used for acquiring data with preset length at the head of the second symbol data and generating second symbol suffix information;
and the second prefix unit is used for acquiring data with a preset length at the tail part of the second symbol data and generating the second symbol prefix information.
In a preferred embodiment of the present invention, the adding module 304 may include:
a first suffix adding unit configured to add the first symbol suffix information to an end of the first symbol data;
a first prefix adding unit configured to add the first symbol target prefix information to the first symbol data header;
a second suffix adding unit operable to add the second symbol suffix information to a tail of the second symbol data;
a second prefix adding unit, configured to add the second symbol prefix information to the second symbol data header.
In a preferred embodiment of the present invention, the adding module 304 is configured to roll off the prefix information and the suffix information by using a preset function or a preset parameter.
For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The foregoing detailed description of a signal processing method and a signal processing apparatus according to the present invention has been presented, and the principles and embodiments of the present invention are explained herein by using specific examples, which are only used to help understand the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (8)
1. A signal processing method, comprising:
acquiring frequency domain data of a baseband signal;
converting the frequency domain data to obtain original time domain data;
generating prefix information with roll-off and suffix information with roll-off according to the original time domain data;
and adding prefix information with roll-off and suffix information with roll-off in the original time domain data to generate target time domain data.
2. The method of claim 1, wherein the raw time domain data comprises: first symbol data located at the head of each slot; the prefix information includes: first symbol original prefix information and first symbol target prefix information; the suffix information includes: first symbol suffix information; the step of generating prefix information with roll-off and suffix information with roll-off according to the original time domain data includes:
acquiring data with preset length at the head of the first symbol data, and generating first symbol suffix information;
acquiring data with preset length at the tail part of the first symbol data to generate original prefix information of the first symbol;
and combining the first symbol original prefix information with preset data to generate the first symbol target prefix information.
3. The method of claim 2, wherein the raw time domain data further comprises: one or more second symbol data located after one of the first symbol data; the prefix information further includes: second symbol prefix information; the suffix information further includes: second symbol suffix information; the step of generating prefix information with roll-off and suffix information with roll-off according to the original time domain data further includes:
acquiring data with preset length at the head of the second symbol data, and generating second symbol suffix information;
and acquiring data with preset length at the tail part of the second symbol data to generate the second symbol prefix information.
4. The method according to claim 3, wherein the step of adding roll-off prefix information and roll-off suffix information to the original time domain data to generate target time domain data comprises:
adding the first symbol suffix information at the tail of the first symbol data;
adding the first symbol target prefix information to the first symbol data header;
adding the second symbol suffix information to the end of the second symbol data;
and adding the second symbol prefix information in the second symbol data head.
5. A signal processing apparatus, characterized by comprising:
the acquisition module is used for acquiring frequency domain data of the baseband signal;
the conversion module is used for converting the frequency domain data to obtain original time domain data;
the generating module is used for generating prefix information with roll-off and suffix information with roll-off according to the original time domain data;
and the adding module is used for adding prefix information with roll-off and suffix information with roll-off in the original time domain data to generate target time domain data.
6. The apparatus of claim 5, wherein the raw time domain data comprises: first symbol data located at the head of each slot; the prefix information includes: first symbol original prefix information and first symbol target prefix information; the suffix information includes: first symbol suffix information; the generation module comprises:
a first suffix unit, configured to obtain data with a preset length at the head of the first symbol data, and generate the first symbol suffix information;
a first original prefix unit, configured to obtain data with a preset length at the tail of the first symbol data, and generate first symbol original prefix information;
and the first target prefix unit is used for combining the first symbol original prefix information with preset data to generate the first symbol target prefix information.
7. The apparatus of claim 6, wherein the raw time domain data further comprises: one or more second symbol data located after one of the first symbol data; the prefix information further includes: second symbol prefix information; the suffix information further includes: second symbol suffix information; the generation module further comprises:
the second suffix unit is used for acquiring data with preset length at the head of the second symbol data and generating second symbol suffix information;
and the second prefix unit is used for acquiring data with a preset length at the tail part of the second symbol data and generating the second symbol prefix information.
8. The apparatus of claim 7, wherein the adding module comprises:
a first suffix adding unit configured to add the first symbol suffix information to an end of the first symbol data;
a first prefix adding unit configured to add the first symbol target prefix information to the first symbol data header;
a second suffix adding unit operable to add the second symbol suffix information to a tail of the second symbol data;
a second prefix adding unit, configured to add the second symbol prefix information to the second symbol data header.
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