CN110224962A - Signal acceptance method, device, readable storage medium storing program for executing and terminal - Google Patents
Signal acceptance method, device, readable storage medium storing program for executing and terminal Download PDFInfo
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- CN110224962A CN110224962A CN201810174912.9A CN201810174912A CN110224962A CN 110224962 A CN110224962 A CN 110224962A CN 201810174912 A CN201810174912 A CN 201810174912A CN 110224962 A CN110224962 A CN 110224962A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2649—Demodulators
- H04L27/265—Fourier transform demodulators, e.g. fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2689—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation
- H04L27/2695—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation with channel estimation, e.g. determination of delay spread, derivative or peak tracking
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L2025/03433—Arrangements for removing intersymbol interference characterised by equaliser structure
- H04L2025/03439—Fixed structures
- H04L2025/03522—Frequency domain
Abstract
The present invention provides a kind of signal acceptance method, is applied to receiver, which comprises the time-domain signal received is carried out frequency domain conversion to form the first signal；The filter frequency domain response factor in first signal is removed to form second signal；Channel estimation and frequency domain equalization are carried out to recover originally transmitted signal to the second signal.Signal acceptance method provided by the invention eliminates influence of the filter parameter to channel, to reduce the complexity of sub-channel equalization, greatly improves the performance of receiver.
Description
Technical field
The present invention relates to the communications fields, more particularly to signal acceptance method, device, readable storage medium storing program for executing and terminal.
Background technique
Existing wireless communication system is mostly based on orthogonal frequency division multiplexing (OFDM) technology, but orthogonal frequency division multiplexing exists
PAPR is excessively high, out-of-band power leaks that serious, stringent Time and Frequency Synchronization, anti-carrier frequency be on the weak side, effectively passes caused by CP mechanism
Defeated rate decline is unfavorable for the deficiencies of fragmentation spectrum utilization.
Usable frequency bandwidth is divided into the subchannel of different bandwidth by multi-carrier wireless communication, and every sub-channels are all made of difference
Filter effectively inhibits band external leakage, while further increasing the availability of frequency spectrum；It does not use CP mechanism simultaneously, improves and effectively pass
Defeated rate；Anti- carrier wave frequency deviation and symbol time offset are strong, requirement of the relaxation system to Time and Frequency Synchronization；It can be used between different subchannels
Different transmission parameter is conducive to carry diversified type of service.
But there is filter parameters in existing multi-carrier wireless communication mode asks what channel had an impact
Topic, which results in the complexities of sub-channel equalization to become very high, has seriously affected the performance of receiver.
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide signal acceptance methods, device, readable
Storage medium and terminal have an impact channel for solving filter parameter in the prior art, lead to answering for sub-channel equalization
Miscellaneous degree becomes very high, has seriously affected the technical problems such as receiver performance.
In order to achieve the above objects and other related objects, the present invention provides a kind of signal acceptance method, is applied to receiver,
The described method includes: the time-domain signal received is carried out frequency domain conversion to form the first signal；It removes in first signal
Filter frequency domain response factor to form second signal；Channel estimation and frequency domain equalization are carried out to restore to the second signal
Originally transmitted signal out.
It is described that the time-domain signal received is subjected to frequency domain conversion to form the first letter in one embodiment of the invention
Number, it specifically includes: carrying out the down-sampling and 2N-FFT frequency-domain transform of 1/2 factor respectively to the time-domain signal, it is described to obtain
First signal.
In one embodiment of the invention, the down-sampling and 2N-FFT frequency of 1/2 factor are carried out respectively to the time-domain signal
Domain transformation, specifically includes: enabling the time-domain signal is y,Wherein, h is radio channel impulse response, xi
For the transmission signal of subchannel, fiFor the frequency of subchannel filter, n is additive white noise, and k is subcarrier, and i is subchannel, B
For the number of subchannel；The down-sampling and 2N-FFT frequency-domain transform of 1/2 factor are carried out, respectively to the time-domain signal y with respectively
Obtain frequency-region signal Y (k/2) and the first signal Y (k)；Wherein,Y (k)=H
(k)Fi(k)Si(k)+W (k),Respectively h, fi、xi, n 2N-FFT transformation, H, F, S, W be respectively h,
fi、xi, n N-FFT transformation.
In one embodiment of the invention, the filter frequency domain response factor in first signal is removed to form second
Signal specifically includes: by the first signal Y (k) multiplied by compensation factor 1/Fi(k), to obtain the second signalIts
In,Fi(k) subchannel filter f locating for subcarrier kiFrequency domain ring
It answers.
In one embodiment of the invention, the down-sampling and 2N-FFT frequency of 1/2 factor are carried out respectively to the time-domain signal y
Domain transformation, specifically includes: before carrying out 2N-FFT frequency-domain transform to the time-domain signal y, mending to the time-domain signal
Zero calculates, by the single symbol lengths of signal from (N+L-1) zero padding to 2N.
In one embodiment of the invention, channel estimation is carried out to the second signal based on LMMSE channel estimation method.
In order to achieve the above objects and other related objects, the present invention provides a kind of signal receiving device comprising: frequency domain turns
Block is changed the mold, for the time-domain signal received to be carried out frequency domain conversion to form the first signal；Compensating module, including multiple compensation
The factor acts on each sub-channels；The compensating module is for removing in corresponding first signal of each sub-channels
Filter frequency domain response factor to form second signal；Channel estimation and frequency domain equalization module, for the second signal
Channel estimation and frequency domain equalization are carried out, to recover originally transmitted signal.
In one embodiment of the invention, the frequency domain conversion module is specifically included: 2N-FFT convolution module, is used for clock synchronization
Domain signal carries out 2N-FFT frequency-domain transform；Down sample module is adopted under 1/2 factor for carrying out respectively to the time-domain signal
Sample；Wherein, enabling the time-domain signal is y,Wherein, h is radio channel impulse response, xiFor subchannel
Transmission signal, fiFor the frequency of subchannel filter, n is additive white noise, and k is subcarrier, and i is subchannel, and B is subchannel
Number；The down-sampling and 2N-FFT frequency-domain transform of 1/2 factor are carried out, respectively to the time-domain signal y to respectively obtain frequency domain
Signal Y (k/2 and) the first signal Y (k)；Y (k)=H (k) Fi(k)Si(k)+W
(k),Respectively h, fi、xi, n 2N-FFT transformation, H, F, S, W are respectively h, fi、xi, n N-FFT become
It changes.
In one embodiment of the invention, the compensating module is specifically used for: by the first signal Y (k) multiplied by compensation
Factor 1/Fi(k), to obtain the second signalWherein,Fi(k)
Subchannel filter f locating for subcarrier kiFrequency domain response.
In one embodiment of the invention, the signal receiving device includes: zero padding module, for believing to the time domain
Before number y carries out 2N-FFT frequency-domain transform, zero padding calculating is carried out to the time-domain signal, by the single symbol lengths of signal from
(N+L-1) zero padding is to 2N.
In order to achieve the above objects and other related objects, the present invention provides a kind of computer readable storage medium, deposits thereon
Computer program is contained, which realizes the signal acceptance method when being executed by processor.
In order to achieve the above objects and other related objects, the present invention provides a kind of reception signal terminal, including processor and
Memory, the memory are used to execute the computer of the memory storage for storing computer program, the processor
Program, so that the terminal executes the signal acceptance method.
As described above, signal acceptance method of the invention, device, readable storage medium storing program for executing and terminal, have below beneficial to effect
Fruit: signal acceptance method provided by the invention eliminates influence of the filter parameter to channel, to reduce sub-channel equalization
Complexity, greatly improve the performance of receiver.
Detailed description of the invention
Fig. 1 is shown as the schematic diagram of signal acceptance method in one embodiment of the invention.
Fig. 2 is shown as the schematic diagram of signal transmitting and receiving principle in one embodiment of the invention.
Fig. 3 is shown as signal acceptance method performance comparison schematic diagram under channel estimation method in one embodiment of the invention.
Fig. 4 is shown as the schematic diagram of signal receiving device in one embodiment of the invention.
Component label instructions
41 frequency domain conversion modules
42 compensating modules
43 channel estimations and frequency domain equalization module
S101~S103 method and step
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.It should be noted that in the absence of conflict, following embodiment and implementation
Feature in example can be combined with each other.
It should be noted that illustrating the basic structure that only the invention is illustrated in a schematic way provided in following embodiment
Think, only shown in schema then with related component in the present invention rather than component count, shape and size when according to actual implementation
Draw, when actual implementation kenel, quantity and the ratio of each component can arbitrarily change for one kind, and its assembly layout kenel
It is likely more complexity.
Referring to Fig. 1, the present invention provides a kind of signal acceptance method, it is applied to receiver.The signal acceptance method packet
It includes:
S101: the time-domain signal received is subjected to frequency domain conversion to form the first signal.
It is described that the time-domain signal received is subjected to frequency domain conversion to form the first signal, it specifically includes: to the time domain
Signal carries out the down-sampling of 2N-FFT frequency-domain transform and 1/2 factor respectively, to obtain first signal.
As shown in Fig. 2, showing the schematic diagram of wireless communication principles in one embodiment of the invention.Assuming that in signals transmission
In, share B sub-channels, NSCThe sub-carrier number of a subcarrier, every sub-channels isIt is a.It is each in each sub-channels
Subcarrier carries output signal x after data are addedi, i=1 ..., B.The signal xiThe sub-channel pass filter for being L by length
The signal y of subchannel is exported after device processingi, the signal y of all subchannelsiFinal transmitting signal is synthesized after superposition.Such as following formula institute
Show,Indicate that all subchannel i are included
Subcarrier serial number, Fi are the frequency of the bandpass filter of subchannel, and fk indicates the frequency of subcarrier k, and Tsym is the sampling period.
Signal is received by the matched filter for each sub-channels that length is L, other subchannel coherent signals is filtered out, protects
Stay current sub-channel useful signal.A certain subcarrier is isolated using the orthogonality between subcarrier by locally associated demodulation again
The effective information transmitted on Y [k].Specifically, receiving signal y can indicate are as follows:Wherein, wherein h is
Radio channel impulse response, n are additive white noise, and k is subcarrier, and i is subchannel, and B is the number of subchannel.
It is worth noting that, traditional receiver receiving end to receive signal y detect when generally use time domain or
Frequency domain detection method.Wherein, tim e- domain detection algorithm mainly has based on matched filtering detection algorithm, based on squeeze theorem algorithm, base
In Minimum Mean Square Error detection algorithm, but its calculation amount is too big, does not use generally in practical applications.Frequency domain detection algorithm is opposite to be counted
It is low to calculate complexity, frequency domain is transformed into using FFT and carries out symbol detection, but the conversion of N-FFT frequency domain still has limitation, calculation amount
Larger, response speed is slow.
The present invention is based on the modes of 2N-FFT frequency-domain transform and down-sampling to realize the detection to signal is received.In classics
In UFMC receiver, the down-sampling that received time-domain symbol is modulated through 2N-FFT and the factor is 2 is examined using zero forcing equalizer
It surveys and differentiates.
Specifically, the time-domain signal received is transformed into frequency domain using FFT calculation method, symbol detection is carried out.Individually
Symbol lengths are N+L-1, receive signal and are converted into parallel symbol after Timing Synchronization, carry out 2N- after zero padding to 2N sampling
FFT operation is transformed into frequency-region signal Wherein,Respectively h,
fi、xi, n 2N-FFT transformation.To the signalThe down-sampling for carrying out 1/2 factor obtains signal Wherein, H, Fi、Si, W be respectively h, fi、xi, n N-FFT transformation.
According to FFT and IFFT Operation Nature, signal x is sentiN-FFT convolution algorithm and 2N-FFT convolution algorithm difference
It is shown below:X (k) indicates xiN-FFT operation,Indicate xi2N point FFT operation, and
Wherein, frequency-region signal need to obtain frequency-domain received signal after the down-sampling of 1/2 factor, that is, take the idol of frequency-region signal
Numerical digit subcarrier data.Frequency-domain received signal Y is indicated are as follows:I is
Subchannel serial number where subcarrier k/2,Respectively h, fi、xi, n 2N-FFT transformation.By relational expressionIt is found that second signalH、Fi、Si, W be respectively h, fi、
xi, n N-FFT transformation.
S102: the filter frequency domain response factor in removal first signal is to form second signal.
Specifically, by the first signal Y (k) multiplied by compensation factor 1/Fi(k), to obtain the second signalIts
In,Fi(k) subchannel filter f locating for subcarrier kiFrequency domain ring
It answers.Further, since the parameter and the occupied subcarrier sequence of each subchannel of the filter that each subchannel known to receiver uses
Number, therefore undistorted compensation can accordingly be carried out to filter from frequency domain angle.It can be seen that the second signalChannel ginseng
Several include H, eliminate influence of the filter parameter to channel and are substantially improved to reduce the complexity of sub-channel equalization
The performance of receiver.
S103: channel estimation and frequency domain equalization are carried out to recover originally transmitted signal to the second signal.
It needs to estimate channel in the relevant detection of ofdm system, the precision of channel estimation directly affects entirely
The performance of system.Channel estimation is the key that realize wireless communication system, is for measuring a performance in wireless communication systems
Important indicator.Can channel estimation determines obtain detailed channel information, to correctly demodulate transmitting letter in receiving end
Number.Frequency domain equalization is usually to go the frequency of compensation channel or system special using the frequency characteristic of the frequency of a tunable filter
Property, so that the overall performance of system is close to undistorted transmission condition.
Preferably, the present invention is estimated using LMMSE channel estimation method (also known as linear Bayes estimation amount) progress channel
Meter, in conjunction with signal acceptance method of the invention, the bit error rate of signal is reduced to it is minimum, with traditional signal acceptance method phase
Than greatly improving signal receiving performance.It is worth noting that, although LMMSE itself is more common, in the present embodiment
In, effect of the signal acceptance method provided by the invention based on the LMMSE channel estimation method reduction bit error rate achieved is very
Significantly, it is illustrated below in conjunction with attached drawing.
As shown in figure 3, illustrating performance comparison of the unlike signal method of reseptance under each channel estimation method.For convenience of area
Point, signal acceptance method provided by the invention is named as optimization method, is to be not optimised by the signal acceptance method that tradition uses
Method by the optimization method and is not optimised method respectively in LMMSE channel estimation method, LS channel estimation method, Yi Jili
Think the performance evaluation under three kinds of situations of channel estimation method compared with.
The horizontal axis of Fig. 3 represents Signal to Noise Ratio (SNR) (Signal Noise Ratio) (dB), is the finger for measuring noise level
Mark；The longitudinal axis then indicates bit error rate SER (Symbol Error Rate), is a kind of for measuring one kind of data transmission accuracy
Index.Existed by the lower left corner of Fig. 3 it is found that sharing 6 curves with unlike signal in figure and representing unlike signal method of reseptance
Bit error rate performance under different channel estimation methods is respectively as follows: use " * " expression optimization method of the invention in LS channel estimation
Bit error rate performance under algorithm indicates that the error code of optimization method of the invention under ideal channel estimation method is forthright with "○"
Can, with bit error rate performance of " △ " expression optimization method of the invention under LMMSE channel estimation method, indicate unexcellent with " ▽ "
Bit error rate performance of the change method under LMMSE channel estimation method is not optimised method in LS channel estimation method with " " expression
Under bit error rate performance, indicated to be not optimised bit error rate performance of the method under ideal channel estimation method with "+".
It follows that being not optimised, the bit error rate of the scheme under each channel estimation method is all very high or even system can not
Work, especially the bit error rate under LMMSE channel estimation method is extremely high.And optimization method proposed by the present invention, in error code
Rate aspect of performance is then substantially better than the method for being not optimised, and approaches very much the bit error rate performance under perfect channel estimation algorithm.
As shown in figure 4, showing the schematic diagram of the signal receiving device in one embodiment of the invention.The signal receiving device
Including frequency domain conversion module 41, compensating module 42 and channel estimation and frequency domain equalization module 43.The frequency domain conversion module 41
For time-domain signal to be carried out 2N-FFT convolutional calculation and down-sampling with 1/2 factor, to form the first signal；The compensation
Module 42 includes multiple compensation factors, acts on each sub-channels, the compensating module 42 is for removing each sub-channels
Filter frequency domain response factor in corresponding first signal is to form second signal；The channel estimation and frequency domain equalization
Module 43 is used to carry out channel estimation and frequency domain equalization to the second signal, to recover originally transmitted signal.The signal
The specific embodiment of reception device and the embodiment of signal acceptance method are similar, and so it will not be repeated.
It should be noted that it should be understood that the modules of apparatus above division be only a kind of logic function division,
It can completely or partially be integrated on a physical entity in actual implementation, it can also be physically separate.And these modules can be with
All realized by way of processing element calls with software；It can also all realize in the form of hardware；It can also part mould
Block realizes that part of module passes through formal implementation of hardware by way of processing element calls software.Furthermore these modules are whole
Or part can integrate together, can also independently realize.Processing element described here can be a kind of integrated circuit, have
The processing capacity of signal.During realization, each step of the above method or the above modules can pass through processor elements
In hardware integrated logic circuit or software form instruction complete.
For example, the above module can be arranged to implement one or more integrated circuits of above method, such as:
One or more specific integrated circuits (ApplicationSpecificIntegratedCircuit, abbreviation ASIC), or, one
Or multi-microprocessor (digitalsingnalprocessor, abbreviation DSP), or, one or more field-programmable gate array
Arrange (FieldProgrammableGateArray, abbreviation FPGA) etc..For another example, when some above module is dispatched by processing element
When the form of program code is realized, which can be general processor, such as central processing unit
(CentralProcessingUnit, abbreviation CPU) or it is other can be with the processor of caller code.For another example, these modules can
To integrate, realized in the form of system on chip (system-on-a-chip, abbreviation SOC).
Those of ordinary skill in the art will appreciate that: realize all or part of the steps of above-mentioned signal acceptance method embodiment
It can be completed by the relevant hardware of computer program.Computer program above-mentioned can store in a computer-readable storage
In medium.When being executed, execution includes the steps that above-mentioned each method embodiment to the program；And storage medium above-mentioned includes:
The various media that can store program code such as ROM, RAM, magnetic or disk.
The present invention also provides a kind of reception signal terminals, including processor and memory, and the memory is based on storing
Calculation machine program, the processor is used to execute the computer program of the memory storage, so that the terminal executes the letter
Number method of reseptance.Above-mentioned processor can be general processor, including central processing unit (CentralProcessingUnit,
Abbreviation CPU), network processing unit (NetworkProcessor, abbreviation NP) etc.；It can also be digital signal processor
(DigitalSignalProcessing, abbreviation DSP), specific integrated circuit
(ApplicationSpecificIntegratedCircuit, abbreviation ASIC), field programmable gate array (Field-
ProgrammableGateArray, abbreviation FPGA) either other programmable logic device, discrete gate or transistor logic device
Part, discrete hardware components.
In conclusion signal acceptance method provided by the invention, device, readable computer storage medium and terminal, removal
Influence of the filter parameter to channel to reduce the complexity of sub-channel equalization greatly improves the performance of receiver.
So the present invention effectively overcomes various shortcoming in the prior art and has high industrial utilization value.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (12)
1. a kind of signal acceptance method, which is characterized in that be applied to receiver, which comprises
The time-domain signal received is subjected to frequency domain conversion to form the first signal；
The filter frequency domain response factor in first signal is removed to form second signal；
Channel estimation and frequency domain equalization processing are carried out to the second signal, to recover originally transmitted signal.
2. signal acceptance method according to claim 1, which is characterized in that described that the time-domain signal received is carried out frequency
Domain is converted to form the first signal, is specifically included:
The down-sampling and 2N-FFT frequency-domain transform of 1/2 factor are carried out, respectively to the time-domain signal to obtain first signal.
3. signal acceptance method according to claim 2, which is characterized in that the time-domain signal is carried out respectively 1/2 because
The down-sampling and 2N-FFT frequency-domain transform of son, specifically include:
Enabling the time-domain signal is y,Wherein, h is radio channel impulse response, xiFor the hair of subchannel
The number of delivering letters, fiFor the frequency of subchannel filter, n is additive white noise, and k is subcarrier, and i is subchannel, and B is of subchannel
Number；
The down-sampling and 2N-FFT frequency-domain transform of 1/2 factor are carried out, respectively to the time-domain signal y to respectively obtain frequency-region signal
Y (k/2) and the first signal Y (k)；
Wherein,Y (k)=H (k) Fi(k)Si(k)+W (k),Respectively
For h, fi、xi, n 2N-FFT transformation, H, F, S, W are respectively h, fi、xi, n N-FFT transformation.
4. signal acceptance method according to claim 3, which is characterized in that the filter frequency in removal first signal
The domain response factor is specifically included with forming second signal:
By the first signal Y (k) multiplied by compensation factor 1/Fi(k), to obtain the second signal
Wherein,Fi(k) subchannel filter f locating for subcarrier kiFrequency
Domain response.
5. signal acceptance method according to claim 3, which is characterized in that the time-domain signal y carry out respectively 1/2 because
The down-sampling and 2N-FFT frequency-domain transform of son, specifically include:
Before carrying out 2N-FFT frequency-domain transform to the time-domain signal y, zero padding calculating is carried out to the time-domain signal, will be believed
Number single symbol lengths from (N+L-1) zero padding to 2N.
6. signal acceptance method according to claim 1, which is characterized in that based on LMMSE channel estimation method to described
Second signal carries out channel estimation.
7. a kind of signal receiving device characterized by comprising
Frequency domain conversion module, for the time-domain signal received to be carried out frequency domain conversion to form the first signal；
Compensating module, including multiple compensation factors, act on each sub-channels；The compensating module is for removing each height
Filter frequency domain response factor in corresponding first signal of channel is to form second signal；
Channel estimation and frequency domain equalization module, for carrying out channel estimation and frequency domain equalization to the second signal, to recover
Originally transmitted signal.
8. signal receiving device according to claim 7, which is characterized in that the frequency domain conversion module specifically includes:
2N-FFT convolution module, for carrying out 2N-FFT frequency-domain transform to time-domain signal；
Down sample module, for carrying out the down-sampling of 1/2 factor respectively to the time-domain signal；
Wherein, enabling the time-domain signal is y,Wherein, h is radio channel impulse response, xiFor subchannel
Transmission signal, fiFor the frequency of subchannel filter, n is additive white noise, and k is subcarrier, and i is subchannel, and B is subchannel
Number；The down-sampling and 2N-FFT frequency-domain transform of 1/2 factor are carried out, respectively to the time-domain signal y to respectively obtain frequency domain
Signal Y (k/2) and the first signal Y (k)；
Y (k)=H (k) Fi(k)Si(k)+W (k),Respectively h,
fi、xi, n 2N-FFT transformation, H, F, S, W are respectively h, fi、xi, n N-FFT transformation.
9. signal receiving device according to claim 8, which is characterized in that the compensating module is specifically used for:
By the first signal Y (k) multiplied by compensation factor 1/Fi(k), to obtain the second signal
Wherein,Fi(k) subchannel filter f locating for subcarrier kiFrequency
Domain response.
10. signal receiving device according to claim 8 characterized by comprising
Zero padding module, for being mended to the time-domain signal before carrying out 2N-FFT frequency-domain transform to the time-domain signal y
Zero calculates, by the single symbol lengths of signal from (N+L-1) zero padding to 2N.
11. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the program is by processor
Signal acceptance method described in any one of claims 1 to 6 is realized when execution.
12. a kind of reception signal terminal characterized by comprising processor and memory；
The memory is used to execute the computer journey of the memory storage for storing computer program, the processor
Sequence, so that the terminal executes the signal acceptance method as described in any one of claims 1 to 6.
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| CN112637406A (en) * | 2020-12-18 | 2021-04-09 | 武汉中云互联科技有限公司 | 5G message preview system and method for mobile communication terminal application |
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