CN108604909B - A kind of signal acceptance method and device - Google Patents
A kind of signal acceptance method and device Download PDFInfo
- Publication number
- CN108604909B CN108604909B CN201680059941.XA CN201680059941A CN108604909B CN 108604909 B CN108604909 B CN 108604909B CN 201680059941 A CN201680059941 A CN 201680059941A CN 108604909 B CN108604909 B CN 108604909B
- Authority
- CN
- China
- Prior art keywords
- signal
- obtains
- phase noise
- disturbance estimation
- interference
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7097—Interference-related aspects
Abstract
This application discloses a kind of signal acceptance method and devices, are related to field of communication technology, can not amplify white noise while removing the interference sections that the intersymbol interference (ISI) that signal includes introduces, to improve the transmission performance of signal.This method comprises: receiving the first signal, the first signal includes the interference sections that ISI is introduced；Linear equalization, demodulation decoding are carried out to the first signal, obtain second signal；The interference sections are estimated according to second signal, obtain the first disturbance estimation signal；First signal subtracts the first disturbance estimation signal, obtains third signal；Third signal demodulation is decoded, the first output signal is obtained.
Description
Technical field
This application involves field of communication technology more particularly to a kind of signal acceptance methods and device.
Background technique
In super Nyquist (faster than nyquist, FTN) signal transmission system, the FTN that transmitting terminal introduces believes
The utilization rate of frequency domain resource can be improved in number forming technique.Specifically, FTN signal forming technique can pass through compressed signal bandwidth
To improve the utilization rate of frequency domain resource.But intersymbol interference (inter-symbol can be generated during compressed signal bandwidth
Interference, ISI), ISI can generate interference to signal, and the interference sections that the ISI that signal includes is introduced can be removed.
In addition, will receive the influence of white noise in signals transmission, white noise cannot be removed；Meanwhile under a multipath channel environment,
Channel can also introduce additional ISI.Interference sections and white noise that the ISI that signal includes is introduced will affect the transporting of signal
It can, wherein the interference sections that ISI is introduced refer to the signal that the interference tap in signal and ISI acts on.
Receiving end can remove the ISI that signal includes by lowest mean square (least mean square, LMS) algorithm
The interference sections of introducing.But receiving end is in the process for removing the interference sections that the ISI that signal includes is introduced by LMS algorithm
In, white noise can be amplified, so that the transmission performance of signal cannot be effectively improved.
Summary of the invention
The embodiment of the present invention provides a kind of signal acceptance method and device, draws to solve in the ISI that removal signal includes
Amplify white noise while the interference sections entered, thus the problem of the transmission performance of signal cannot be effectively improved.
In order to achieve the above objectives, the embodiment of the present invention adopts the following technical scheme that
On the one hand, a kind of signal acceptance method is provided, may include: the interference sections for receiving introduced comprising ISI first
First signal；Then linear equalization, demodulation decoding are carried out to the first signal, obtains second signal；Then according to second signal
The interference sections are estimated, the first disturbance estimation signal is obtained；Subsequent, the first signal subtracts the first disturbance estimation signal,
Obtain third signal；Finally third signal demodulation is decoded, obtains the first output signal.It is gone with receiving end according to LMS algorithm
The method for the interference sections that the ISI for including except the first signal is introduced is compared, and technical solution provided in an embodiment of the present invention passes through the
One signal subtracts the first disturbance estimation signal to remove the interference sections that the ISI that the first signal includes is introduced, in this process not
White noise can be amplified.Therefore, technical solution provided in an embodiment of the present invention can effectively improve the transmission performance of FTN signal.
In a kind of possible design, this method can also include: to be carried out according to the first output signal to the interference sections
Estimation, obtains the second disturbance estimation signal；First signal subtracts the second disturbance estimation signal, obtains fourth signal；Believe the 4th
Number demodulation decoding, obtains the second output signal.When specific implementation, in order to make the received output signal of the stay of two nights closest to original letter
Number, the output signal that receiving end can obtain the last time is handled.The possible implementation gives a kind of processed
Journey.
In a kind of possible design, the interference sections are estimated according to second signal, obtain the first Interference Estimation
Signal may include: to be modulated to second signal, and roll up to the interference tap in the signal and ISI obtained after modulation
Product operation, obtains the first disturbance estimation signal.
In a kind of possible design, linear equalization, demodulation decoding are carried out to the first signal, obtain second signal, it can
To include: to carry out linear equalization, demodulation, deinterleaving and decoding to the first signal, second signal is obtained.In this case, to second
Signal is modulated, and carries out convolution algorithm to the interference tap in the signal and ISI obtained after modulation, is obtained the first interference and is estimated
Signal is counted, may include: that second signal is interleaved and is modulated, and in the signal and ISI obtained after intertexture and modulation
It interferes tap to carry out convolution algorithm, obtains the first disturbance estimation signal.
In a kind of possible design, linear equalization, demodulation decoding are carried out to the first signal, obtain second signal, it can
To include: to carry out the linear equalization with phase noise compensation, demodulation decoding to the first signal, second signal is obtained.According to
Binary signal estimates the interference sections, obtains the first disturbance estimation signal, may include: to be modulated to second signal,
And it is dry in the signal and ISI for adding the estimated value of phase noise, and modulated and addition phase noise estimated value being obtained
It disturbs tap and carries out convolution algorithm, obtain the first disturbance estimation signal, wherein the estimated value of phase noise is to execute band phase noise
The estimated value of phase noise used in the linear equalization of compensation.In this case, the first signal subtracts the first Interference Estimation letter
Number, third signal is obtained, may include: that the first signal subtracts the first disturbance estimation signal, is obtained using after phase noise compensation
To third signal.
In a kind of possible design, linear equalization, demodulation decoding are carried out to the first signal, obtain second signal, it can
To include: to carry out the linear equalization with phase noise compensation, demodulation decoding to the first signal, second signal is obtained.According to
Binary signal estimates the interference sections, obtains the first disturbance estimation signal, may include: to be modulated to second signal,
And the interference tap in modulated obtained signal and ISI is subjected to convolution algorithm, obtain the first disturbance estimation signal.The situation
Under, the first signal subtracts the first disturbance estimation signal, obtains third signal, may include: after phase noise compensation
One signal subtracts the first disturbance estimation signal, obtains third signal.
On the other hand, a kind of signal receiving device is provided, may include: receiving module, for receiving the first signal,
In, the first signal includes the interference sections that ISI is introduced；Module is obtained, for carrying out linear equalization to the first signal, demodulation is translated
Code, obtains second signal；Estimation module obtains the first interference and estimates for being estimated according to second signal the interference sections
Count signal；Module is removed, the first disturbance estimation signal is subtracted for executing the first signal, obtains third signal；Obtain module also
For being decoded to third signal demodulation, obtaining the first output signal.
In a kind of possible design, estimation module is also used to, and is estimated according to the first input signal to the interference sections
Meter, obtains the first disturbance estimation signal；Removal module is also used to, and is executed the first signal and is subtracted the second disturbance estimation signal, obtains
Fourth signal；It obtains module to be also used to, fourth signal demodulation is decoded, the second output signal is obtained.
In a kind of possible design, estimation module is specifically used for: being modulated to second signal, and to obtaining after modulation
Signal and ISI in interference tap carry out convolution algorithm, obtain the first disturbance estimation signal.
It in a kind of possible design, obtains module and is specifically used for: linear equalization, demodulation, solution friendship are carried out to the first signal
It knits and decodes, obtain second signal；Estimation module is specifically used for: being interleaved and modulates to second signal, and to intertexture and adjusts
Interference tap in the signal and ISI obtained after system carries out convolution algorithm, obtains the first disturbance estimation signal.
In a kind of possible design, obtaining module specifically can be used for: carry out band phase noise compensation to the first signal
Linear equalization, demodulation decoding, obtain second signal.Estimation module specifically can be used for: second signal is modulated, and
Add the estimated value of phase noise, and the interference in the signal and ISI that modulated and addition phase noise estimated value is obtained
Tap carries out convolution algorithm, obtains the first disturbance estimation signal, wherein the estimated value of phase noise is to execute band phase noise to mend
The estimated value of phase noise used in the linear equalization repaid.In this case, removal module specifically can be used for: executing first
Signal subtracts the first disturbance estimation signal, using obtaining third signal after phase noise compensation.
In a kind of possible design, obtaining module specifically can be used for: carry out band phase noise compensation to the first signal
Linear equalization, demodulation decoding, obtain second signal.Estimation module specifically can be used for: second signal is modulated, and
Interference tap in modulated obtained signal and ISI is subjected to convolution algorithm, obtains the first disturbance estimation signal.The situation
Under, removal module specifically can be used for: it executes the first signal after phase noise compensation and subtracts the first disturbance estimation signal,
Obtain third signal.
Another aspect provides a kind of computer readable storage medium, is stored with computer in computer readable storage medium
It executes instruction, when at least one processor of FTN reception device executes the computer executed instructions, FTN reception device is executed
Signal acceptance method provided by any possible implementation of above-mentioned aspect or above-mentioned aspect.
In another aspect, providing a kind of computer program product, which includes computer executed instructions, should
Computer executed instructions store in a computer-readable storage medium；At least one processor of FTN reception device can be from meter
Calculation machine readable storage medium storing program for executing reads the computer executed instructions, at least one processor executes the computer executed instructions and makes
FTN reception device implements receiving side signal provided by any possible implementation of above-mentioned aspect or above-mentioned aspect
Method.
It is to be appreciated that any FTN reception device or computer storage medium of above-mentioned offer are used to execute above
Provided signal acceptance method, therefore, attainable beneficial effect can refer to corresponding signal presented above and connect
Beneficial effect in receiving method, details are not described herein again.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram for FTN signal transmission system that the prior art provides；
Fig. 2 is the schematic diagram of another kind FTN signal transmission system provided in an embodiment of the present invention；
Fig. 3 is a kind of flow chart of signal acceptance method provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of the tap in a kind of ISI provided in an embodiment of the present invention；
Fig. 5 is a kind of process schematic for obtaining second signal provided in an embodiment of the present invention；
Fig. 6 is a kind of process schematic for obtaining the first output signal provided in an embodiment of the present invention；
Fig. 7 is a kind of process schematic for obtaining the second output signal provided in an embodiment of the present invention；
Fig. 8 is the schematic diagram of another kind FTN signal transmission system provided in an embodiment of the present invention；
Fig. 9 is the schematic diagram of another kind FTN signal transmission system provided in an embodiment of the present invention；
Figure 10 is the schematic diagram of another kind FTN signal transmission system provided in an embodiment of the present invention；
Figure 11 is a kind of method schematic diagram for being inserted into known pilot provided in an embodiment of the present invention；
Figure 12 is the Performance Simulation Results of the signal transmission provided in an embodiment of the present invention based on Matlab；
Figure 13 is a kind of structural schematic diagram of receiving end provided in an embodiment of the present invention；
Figure 14 is a kind of structural schematic diagram of signal receiving device provided in an embodiment of the present invention.
Specific embodiment
As shown in Figure 1, being a kind of schematic diagram of FTN signal transmission system.FTN signal transmission system shown in FIG. 1 includes:
Transmitting terminal, channel and receiving end.Transmitting terminal can to information source generate original signal be encoded, modulate and FTN signal at
Type etc., so that original signal is converted to the FTN signal that can be transmitted in the channel.Then, FTN signal is reached by transmission
Receiving end, wherein FTN signal passes through channel response during transmission, while will receive the influence of white noise.Receiving end
After receiving FTN signal, FTN matched filtering is first carried out, then includes according to the FTN signal that LMS algorithm removal receives
The interference sections that ISI is introduced, and the signal after the interference sections introduced to removal ISI carries out demodulation decoding, is exported
Signal (i.e. the estimated value of original signal), finally, exporting output signal to the stay of two nights.Wherein, the information source of transmitting terminal is for generating
Original signal, the stay of two nights of receiving end is for receiving output signal.Channel is the transmission environment of FTN signal, channel may include but
It is not limited to additive white Gaussian noise (additive white gaussian noise, AWGN) channel and multipath channel etc..White noise
Sound can be introduced into transmitting terminal, channel, receiving end, all be unified in Fig. 1 equivalent among channel.The FTN of receiving end matches filter
Wave is used to filter out the interference outside band and noise, and signal-to-noise ratio can be improved.Receiving end is removing the ISI received according to LMS algorithm
During the interference sections of introducing, white noise can be amplified, so that the transmission performance of FTN signal cannot be effectively improved.
Based on this, the embodiment of the invention provides a kind of technical solutions: receiving end is decoded according to linear balanced, demodulation
Signal later constructs disturbance estimation signal, wherein disturbance estimation signal is the ISI that the FTN signal that receiving end receives includes
The estimated result of the interference sections of introducing；Then, receiving end executes the FTN signal received and subtracts disturbance estimation signal, goes forward side by side
Row demodulation decoding, obtains output signal；Finally, receiving end exports output signal to the stay of two nights.In this process, receiving end is not
White noise can be amplified, so as to effectively improve the transmission performance of FTN signal.
It should be understood that the technical solution of the application can be not only used for FTN signal transmission system, can be also used for other can draw
Enter the system of ISI, solves to amplify white noise while removing the interference sections that the ISI that signal includes is introduced, cannot effectively mention
The problem of transmission performance of high RST.
Below by taking FTN signal transmission system as an example, it is described.Technical solution provided in an embodiment of the present invention can be applied
In FTN signal transmission system as shown in Figure 2, FTN signal transmission system shown in Fig. 2 includes: transmitting terminal, channel and reception
End.Transmitting terminal in the treatment process for the original signal that transmitting terminal generates information source, with FTN signal transmission system shown in FIG. 1
It is identical to the treatment process of the original signal of information source generation.Receiving end may refer to the treatment process of the FTN signal received
Hereafter.
" first " and " second " herein etc. is not do any other limit to more clearly distinguish different objects
It is fixed." multiple " herein refer to two or more.
As shown in figure 3, being a kind of flow chart of signal acceptance method provided in an embodiment of the present invention, this method may include
Following steps S101~S105:
S101: receiving end receives the first signal.Wherein, the first signal includes the interference sections that ISI is introduced.
The letter that first signal can be the FTN signal channel transmission of transmitting terminal transmission and obtain after being influenced by white noise etc.
Number.The process that the original signal that transmitting terminal generates information source is converted to the FTN signal that can be transmitted in the channel may refer to
Above.
The interference sections that ISI is introduced, refer to the signal that the interference tap in signal and ISI acts on.Tap in ISI
Including useful tap and interference tap, the maximum tap of energy is useful tap in ISI, and other taps are interference taps, if will
The position mark of useful tap actuating signal is reference position, then other taps act on the front and back of signal reference position, such as Fig. 4
It is shown.
It should be noted that under awgn channel environment, the interference sections that the ISI that the first signal includes is introduced may include
The interference sections that the ISI that FTN technology generates is introduced.Under a multipath channel environment, the interference portion that the ISI that the first signal includes is introduced
Divide may include that FTN technology and multipath channel combine the interference sections that the ISI generated is introduced.
S102: receiving end carries out linear equalization to the first signal, demodulation decodes, and obtains second signal.
It receiving end can be according in LMS, recurrence least square (recursive least square, RLS) algorithm etc.
It is any that linear equalization is carried out to the first signal.If receiving end according to LMS algorithm to the first signal carry out linear equalization, second
Signal can be the output signal that the stay of two nights is output in FTN signal transmission system shown in FIG. 1.
Receiving end is to estimate original signal to the processing of the first signal.The ISI for including due to the first signal
The interference sections of introducing and the exact value of white noise are unknowable, and receiving end cannot obtain accurate original signal, therefore, the present invention
It can be according to the estimated value of original signal (such as second signal or the first output hereinafter in the technical solution that embodiment provides
Signal or the second output signal) building disturbance estimation signal.
The process schematic of S102, can be as shown in Figure 5.Second signal obtained in the embodiment of the present invention will not be exported
To the stay of two nights, and can receiving end be further processed.After receiving end executes S102, it will continue to execute S103-S105.S103-
The process schematic of S105, can be as shown in Figure 6.
S103: the interference sections are estimated according to second signal in receiving end, obtain the first disturbance estimation signal.
Specifically, receiving end is modulated second signal, and to the interference tap in the signal and ISI obtained after modulation
Convolution algorithm is carried out, the first disturbance estimation signal is obtained.
S104: receiving end executes the first signal and subtracts the first disturbance estimation signal, obtains third signal.
The interference that receiving end executes in Fig. 6, which is eliminated, subtracts the first disturbance estimation signal for executing the first signal, to go
The interference sections introduced except the ISI in the first signal.
S105: receiving end decodes third signal demodulation, obtains the first output signal.
Optionally, receiving end can export the first output signal to the stay of two nights.Alternatively, receiving end can execute following steps
S106~S108 obtains the second output signal, and the second output signal is exported to the stay of two nights.The process of S106~S108 is illustrated
Figure, can be as shown in Figure 7.
S106: the interference sections are estimated according to the first output signal in receiving end, obtain the second disturbance estimation signal.
S107: receiving end executes the first signal and subtracts the second disturbance estimation signal, obtains fourth signal.
S108: receiving end decodes fourth signal demodulation, obtains the second output signal.
When specific implementation, in order to make the received output signal of the stay of two nights closest to original signal, receiving end can be to the last time
The output signal of acquisition is handled, and treatment process may refer to S106~S108.For example, receiving end is according to obtaining in S105
First output signal estimates the interference sections, obtains the second disturbance estimation signal, and then it is dry to subtract second for the first signal
Estimation signal is disturbed, finally exports the second output signal obtained in S108 to the stay of two nights.Optionally, removal can be set in receiving end
The default threshold of the number (hereinafter referred to the number of iterations) of the treatment process for the interference sections that the ISI that first signal includes is introduced
Value.S103~S105 may be considered in technical solution provided in an embodiment of the present invention, and receiving end removes the first signal and includes
The first time iteration for the interference sections that ISI is introduced.S106~S108 may be considered technical solution provided in an embodiment of the present invention
In, receiving end removes second of iteration of the process for the interference sections that the ISI that the first signal includes is introduced.If the number of iterations reaches
Preset threshold, then receiving end exports the output signal of acquisition to the stay of two nights.
It is, moreover, an optional that stopping iteration if the performance of FTN signal transmission system restrains, receiving end is defeated by output signal
Out to the stay of two nights.Wherein, the performance convergence of FTN signal transmission system is it is to be understood that receiving end obtains after certain iteration terminates
Output signal, after terminating with last iteration receiving end obtain output signal it is identical, illustrate FTN signal transmission system
Performance convergence.
In technical solution provided in an embodiment of the present invention, receiving end carries out linear equalization, demodulation to received first signal
Second signal is obtained with decoding, then, the interference sections are estimated according to second signal, obtains the first Interference Estimation letter
Number, subsequent, the first signal subtracts the first disturbance estimation signal, the first output signal is obtained, finally, the first output signal is exported
To the stay of two nights.Compared with receiving end removes the method for the interference sections that the ISI that the first signal includes is introduced according to LMS algorithm, this hair
The technical solution that bright embodiment provides subtracts the first disturbance estimation signal by the first signal to remove the ISI that the first signal includes
The interference sections of introducing will not amplify white noise in this process.Therefore, technical solution provided in an embodiment of the present invention can have
Effect improves the transmission performance of FTN signal.
Optionally, after the original signal that transmitting terminal generates information source encodes, it can be interleaved, then be adjusted
System and the molding of FTN signal.In this case, S102 may include: that receiving end carries out linear equalization, demodulation, solution friendship to the first signal
It knits and decodes, obtain second signal.S103 may include: that receiving end is interleaved and modulates to second signal, and to interweaving and
Interference tap in the signal and ISI obtained after modulation carries out convolution algorithm, obtains the first disturbance estimation signal.Based on this, one
The schematic diagram of kind FTN signal transmission system, can be as shown in Figure 8.
Optionally, transmitting terminal can make an uproar because the non-ideal characteristic of up-conversion carrier wave generates phase after the molding of FTN signal
Sound, receiving end also can be because the non-ideal characteristic of down coversion carrier wave generate phase noise before carrying out matched filtering.In this case,
S102 may include: that receiving end carries out the linear equalization with phase noise compensation to the first signal, demodulation decodes, and obtain second
Signal.Wherein, the linear equalization implementation with phase noise compensation can be to be performed separately linear equalization and phase noise benefit
It repays, or executes linear equalization and phase noise compensation together.Wherein, receiving end carries out phase noise compensation to the first signal
When, the estimated value of the phase noise of the estimated value for the phase noise for needing to be generated according to transmitting terminal and receiving end generation carries out phase
Position noise compensation.Since FTN signal transmission system is a linear time invariant system, phase noise is a slow change in the time domain
Process, may be regarded as constant within the scope of an ISI response length, and therefore, in the embodiment of the present invention, receiving end is produced according to transmitting terminal
The estimated value for the phase noise that the estimated value of raw phase noise and receiving end generate and carry out phase noise compensation.
In an optional implementation manner, S103 may include: that receiving end is modulated second signal, and adds phase
The estimated value of position noise, and by the interference tap in modulated and addition phase noise estimated value obtained signal and ISI into
Row convolution algorithm obtains the first disturbance estimation signal, wherein the estimated value of phase noise is to execute the line with phase noise compensation
Property equilibrium in estimated phase noise value.In this case, S104 may include: that receiving end the first signal of execution subtracts first
Disturbance estimation signal obtains third signal using phase noise compensation.One of optional implementation FTN signal passes
The schematic diagram of defeated system can be as shown in figure 9, Fig. 9 be drawn on the basis of Fig. 2.
In another optional implementation, S103 may include: that receiving end is modulated second signal, and exchanges
Interference tap in the signal and ISI obtained after system carries out convolution algorithm, obtains the first disturbance estimation signal.In this case,
S104 may include: that first signal of the receiving end execution after phase noise compensation subtracts the first disturbance estimation signal, obtain
Third signal.The schematic diagram of one of optional implementation FTN signal transmission system can be as shown in Figure 10, Tu10Shi
It is drawn on the basis of Fig. 2.
The acquisition process of the estimated value of phase noise may include: a certain position insertion one of the transmitting terminal to constellation point symbol
A known pilot, wherein the position can be position and first segment constellation between two sections of constellation point symbols of arbitrary neighborhood
Before point symbol and after final stage constellation point symbol；Then, in phase noise compensation, leading for the position is extracted in receiving end
Frequently, and with known pilot compare, calculate phase difference value；Subsequent, receiving end is intended according to phase difference value and linear interpolation fitting process
Close out the estimated value of phase noise；Finally, receiving end, which reversely rotates angle shown in the estimated value of phase noise, can be completed benefit
It repays.Wherein, the estimated value of phase noise can be an angle value, for example, it may be π/3.
Wherein, the original signal that transmitting terminal generates information source is encoded and is modulated, and constellation point symbol can be obtained.Constellation
Point symbol can be divided into n sections, and every section of constellation point symbol may include one or more useful modulated signals, and n >=1, n are whole
Number.Before per position between two sections of adjacent constellation point symbols and first segment constellation point symbol and final stage constellation glyph
Position after number, can be inserted known pilot, as shown in figure 11.Known pilot can include but is not limited to be made of {+1, -1 }
Binary phase shift keying (binary phase shift keying, BPSK) symbol.
Signal acceptance method provided above is illustrated below by a specific example.
Assuming that signal bandwidth is 50 megahertzs, coding mode is the low-density checksum (low that code rate is 0.8
Density parity check code, LDPC) code, the channel circumstance of consideration is AWGN, receives and dispatches the phase noise intensity at both ends
It is -95dBc/Hz@100KHz, is inserted into the known pilot that a length is 1 at interval of 20 useful modulated signals, it is known that pilot tone
Select BPSK symbol.So, the Performance Simulation Results of the signal transmission based on Matlab are shown in Fig.12.Wherein, τ is indicated
FTN compressed signal bandwidth ratio, ite. indicate the number of iterations.Curve 1, curve 2 are respectively 16384 quadrature amplitude modulations
Under (quadrature amplitude modulation, QAM) and 4096QAM, believe in conventional Nyquist signal transmission system
Number transmission performance situation, i.e. also and ISI is not present in not compressed signal frequency spectrum (τ=1).Curve 3, curve 4, curve 5 and curve
6 be the transmission performance situation of FTN signal under different situations, and modulation system 4096QAM, FTN Spectrum compression ratio τ is 6/7.Its
In, curve 3 is the transmission performance situation of FTN signal in FTN signal transmission system as shown in Figure 1.Curve 4, curve 5 and curve
6 be respectively the transmission performance of FTN signal when the number of iterations is respectively 1,4 and 9 in technical solution provided in an embodiment of the present invention
Situation.When the number of iterations is 4,5,6,7,8 and 9, the transmission performance value of FTN signal tends to be identical, it is believed that the transmission of FTN signal
The performance of system tends to restrain.Figure 12 illustratively gives the transmission performance situation of FTN signal when the number of iterations is 4 and 9.
Here, modulation system 16384QAM, and when τ is 1 corresponding conventional Nyquist signal transmission system spectrum efficiency, and
Modulation system is 4096 QAM, and when τ is 6/7 corresponding FTN signal transmission system spectrum efficiency it is identical.
Based on Figure 12, when bit error rate (bit error rate, BER) is 10-6When, the bit signal-to-noise ratio E in curve 3b/
N0Relative to the E in curve 1b/N0Only reduce 1.8dB.E in curve 4b/N0Relative to the E in curve 1b/N0It reduces
3.3dB.E in curve 5 and curve 6b/N0Relative to the E in curve 1b/N04.6dB is reduced, and FTN signal in this case
Transmission performance value tend to be identical with the transmission performance value ideally shown in curve 2 without ISI, it is clear that relative to such as
Prior art shown in FIG. 1, technical solution provided in an embodiment of the present invention can effectively improve the transporting of FTN signal
Can, obtain significant performance gain.
It is above-mentioned that mainly scheme provided in an embodiment of the present invention is described from the angle of receiving end.It is understood that
It is that, in order to realize above-mentioned each function, receiving end, which contains, executes the corresponding hardware configuration of each function and/or software module.
Those skilled in the art should be readily appreciated that, module described in conjunction with the examples disclosed in the embodiments of the present disclosure and calculation
Method step, the application can be realized with the combining form of hardware or hardware and computer software.Some function is actually with hardware
Or computer software drives the mode of hardware to execute, the specific application and design constraint depending on technical solution.Specially
Industry technical staff can use different methods to achieve the described function each specific application, but this realization is not
It is considered as beyond scope of the present application.
Figure 13 shows a kind of structural schematic diagram of receiving end 13.Receiving end 13 may include: receiving module 1301, obtain
Module 1302, estimation module 1303 and removal module 1304.Receiving module 1301 can execute the S101 etc. in Fig. 3, and/or use
In other processes of techniques described herein.S102, S105 and S108 etc. in Fig. 3 can be executed by obtaining module 1302, and/
Or other processes for techniques described herein.Estimation module 1303 can execute S103 and S106 in Fig. 3 etc., and/
Or other processes for techniques described herein.Removal module 1304 can execute S104 and S107 in Fig. 3 etc., and/
Or other processes for techniques described herein.Function possessed by each functional module in this each functional module can be with
It is inferred to according to each step in each method embodiment presented above, or Summary institute above can be referred to
The content of offer, details are not described herein again.
It as shown in figure 14, is a kind of structural schematic diagram of signal receiving device 14 provided in an embodiment of the present invention.Signal connects
Receiving apparatus 14 may include: processor 1401, transceiver 1402, memory 1403 and bus 1404；Wherein, processor
1401, transceiver 1402 and memory 1403 are connected with each other by bus 1404.Processor 1401 can be CPU, general procedure
Device, digital signal processor (digital signal processor, DSP), specific integrated circuit (application-
Specific integrated circuit, ASIC), field programmable gate array (field programmable gate
Array, FPGA) either other programmable logic device, transistor logic, hardware component or any combination thereof.It can
To realize or execute various illustrative logic blocks, module and circuit in conjunction with described in present disclosure.The place
Reason device is also possible to realize the combination of computing function, such as combines comprising one or more microprocessors, DSP and microprocessor
Combination etc..Memory 1403 is for storing computer executed instructions, and when receiving end 13 is run, processor 1401 executes memory
The computer executed instructions of 1403 storages, so that receiving end 13 executes any one receiving side signal provided in an embodiment of the present invention
Method.Specific signal acceptance method can refer to the associated description in above and attached drawing, and details are not described herein again.Memory 1403 can be with
Including volatile memory, such as random access memory (random access memory, RAM), memory 1403 can also
To include nonvolatile memory, such as read-only memory (read only memory, ROM), flash memory, hard disk drive
Dynamic device (hard-disk drive, HDD) or solid state hard disk (solid state drives, SSD), memory 1403 can be with
The combination of memory including mentioned kind.Bus 1404 can be Peripheral Component Interconnect standard (peripheral
Component interconnect, PCI) bus or expanding the industrial standard structure (extended industry standard
Architecture, EISA) bus etc..The bus can be divided into address bus, data/address bus, control bus etc..For convenient for
It indicates, is only indicated with a thick line in Figure 14, it is not intended that an only bus or a type of bus.
The step of method in conjunction with described in present disclosure or algorithm can realize in a manner of hardware, can also
It is realized in a manner of being to execute software instruction by processing module.Software instruction can be made of corresponding software module, software
Module can be stored on RAM, flash memory, ROM, Erasable Programmable Read Only Memory EPROM (erasable programmable
ROM, EPROM), Electrically Erasable Programmable Read-Only Memory (electrically EPROM, EEPROM), register, hard disk, movement
In the storage medium of hard disk, CD-ROM (CD-ROM) or any other form well known in the art.One kind is illustratively deposited
Storage media is coupled to processor, to enable a processor to from the read information, and can be written to the storage medium
Information.Certainly, storage medium is also possible to the component part of processor.Pocessor and storage media can be located in ASIC.
Those skilled in the art are it will be appreciated that in said one or multiple examples, function described herein
It can be realized with hardware, software, firmware or their any combination.It when implemented in software, can be by these functions
Storage in computer-readable medium or as on computer-readable medium one or more instructions or code transmitted.
Computer-readable medium includes computer storage media and communication media, and wherein communication media includes convenient for from a place to another
Any medium of one place transmission computer program.Storage medium can be general or specialized computer can access it is any
Usable medium.
Claims (10)
1. a kind of signal acceptance method characterized by comprising
Receive the first signal, wherein first signal includes the interference sections that intersymbol interference ISI is introduced；
Linear equalization, demodulation decoding are carried out to first signal, obtain second signal；
The interference sections are estimated according to the second signal, obtain the first disturbance estimation signal；
First signal subtracts first disturbance estimation signal, obtains third signal；
The third signal demodulation is decoded, the first output signal is obtained；
The interference sections are estimated according to first output signal, obtain the second disturbance estimation signal；
First signal subtracts second disturbance estimation signal, obtains fourth signal；
The fourth signal demodulation is decoded, the second output signal is obtained.
2. the method according to claim 1, wherein being estimated according to the second signal to the interference sections
Meter, obtains the first disturbance estimation signal, comprising:
The second signal is modulated, and convolution is carried out to the interference tap in the signal and the ISI obtained after modulation
Operation obtains the first disturbance estimation signal.
3. according to the method described in claim 2, it is characterized in that, carrying out linear equalization to first signal, demodulation is translated
Code, obtains second signal, comprising:
Linear equalization, demodulation, deinterleaving and decoding are carried out to first signal, obtain second signal；
The second signal is modulated, and convolution is carried out to the interference tap in the signal and the ISI obtained after modulation
Operation obtains the first disturbance estimation signal, comprising:
The second signal is interleaved and is modulated, and to the interference in the signal and the ISI obtained after intertexture and modulation
Tap carries out convolution algorithm, obtains the first disturbance estimation signal.
4. according to the method described in claim 2, it is characterized in that, carrying out linear equalization to first signal, demodulation is translated
Code, obtains second signal, comprising:
Linear equalization with phase noise compensation, demodulation decoding are carried out to first signal, obtain second signal；
The second signal is modulated, and convolution is carried out to the interference tap in the signal and the ISI obtained after modulation
Operation obtains the first disturbance estimation signal, comprising:
The second signal is modulated, and adds the estimated value of phase noise, and will be modulated and addition phase noise
Interference tap in the signal and the ISI that estimated value obtains carries out convolution algorithm, obtains the first disturbance estimation signal, wherein
The estimated value of the phase noise is to execute the estimated value of phase noise used in the linear equalization with phase noise compensation；
First signal subtracts first disturbance estimation signal, obtains third signal, comprising:
First signal subtracts first disturbance estimation signal, obtains third signal using phase noise compensation.
5. according to claim 1 to 2 described in any item methods, which is characterized in that first signal carry out linear equalization,
Demodulation decoding, obtains second signal, comprising:
Linear equalization with phase noise compensation, demodulation decoding are carried out to first signal, obtain second signal；
First signal subtracts first disturbance estimation signal, obtains third signal, comprising:
First signal after phase noise compensation subtracts first disturbance estimation signal, obtains third signal.
6. a kind of signal receiving device characterized by comprising
Receiving module, for receiving the first signal, wherein first signal includes the interference sections that intersymbol interference ISI is introduced；
Module is obtained, for carrying out linear equalization to first signal, demodulation decodes, and obtains second signal；
Estimation module obtains the first disturbance estimation signal for estimating according to the second signal the interference sections；
Module is removed, first disturbance estimation signal is subtracted for executing first signal, obtains third signal；
The acquisition module is also used to, and is decoded to the third signal demodulation, is obtained the first output signal；
The estimation module is also used to, and is estimated according to first output signal the interference sections, it is dry to obtain second
Disturb estimation signal；
The removal module is also used to, and is executed first signal and is subtracted second disturbance estimation signal, obtains fourth signal；
The acquisition module is also used to, and is decoded to the fourth signal demodulation, is obtained the second output signal.
7. device according to claim 6, which is characterized in that
The estimation module is specifically used for: being modulated to the second signal, and to the signal and the ISI obtained after modulation
In interference tap carry out convolution algorithm, obtain the first disturbance estimation signal.
8. device according to claim 7, which is characterized in that
The acquisition module is specifically used for: carrying out linear equalization, demodulation, deinterleaving and decoding to first signal, obtains the
Binary signal；
The estimation module is specifically used for: the second signal being interleaved and modulated, and to obtaining after intertexture and modulation
Interference tap in signal and the ISI carries out convolution algorithm, obtains the first disturbance estimation signal.
9. according to the described in any item devices of claim 6 to 7, which is characterized in that
The acquisition module is specifically used for: carrying out the linear equalization with phase noise compensation to first signal, demodulation is translated
Code, obtains second signal；
The estimation module is specifically used for: being modulated to the second signal, and adds the estimated value of phase noise, and will be through
Interference tap in the estimated value obtained signal and the ISI of modulation and addition phase noise carries out convolution algorithm, obtains the
One disturbance estimation signal, wherein the estimated value of the phase noise is to execute in the linear equalization with phase noise compensation to be made
The estimated value of phase noise；
The removal module is specifically used for: executing first signal and subtracts first disturbance estimation signal, using phase
Noise compensation obtains third signal.
10. according to the described in any item devices of claim 6 to 7, which is characterized in that
The acquisition module is specifically used for: carrying out the linear equalization with phase noise compensation to first signal, demodulation is translated
Code, obtains second signal；
The removal module is specifically used for: executing first signal after phase noise compensation and subtracts first interference
Estimate signal, obtains third signal.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2016/107916 WO2018098666A1 (en) | 2016-11-30 | 2016-11-30 | Method and device for receiving signals |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108604909A CN108604909A (en) | 2018-09-28 |
| CN108604909B true CN108604909B (en) | 2019-10-01 |
Family
ID=62240964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680059941.XA Active CN108604909B (en) | 2016-11-30 | 2016-11-30 | A kind of signal acceptance method and device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108604909B (en) |
| WO (1) | WO2018098666A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113517934B (en) * | 2020-04-10 | 2022-10-11 | 华为技术有限公司 | Signal processing method and related equipment |
| CN113852581A (en) * | 2021-09-16 | 2021-12-28 | 电子科技大学 | Phase noise estimation and elimination method for single carrier THP-FTN system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1421085A (en) * | 2000-03-16 | 2003-05-28 | 高通股份有限公司 | Method and apparatus for combined soft-decision based on interference cancellation and decoding |
| CN102035568A (en) * | 2010-11-05 | 2011-04-27 | 意法·爱立信半导体（北京）有限公司 | Method and device for eliminating interference in mobile communication system |
| CN104025466A (en) * | 2011-12-21 | 2014-09-03 | 瑞典爱立信有限公司 | Finger placement in multi-stage interference cancellation |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4936680B2 (en) * | 2005-05-20 | 2012-05-23 | 富士通株式会社 | OFDM receiving method and receiving apparatus |
-
2016
- 2016-11-30 CN CN201680059941.XA patent/CN108604909B/en active Active
- 2016-11-30 WO PCT/CN2016/107916 patent/WO2018098666A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1421085A (en) * | 2000-03-16 | 2003-05-28 | 高通股份有限公司 | Method and apparatus for combined soft-decision based on interference cancellation and decoding |
| CN102035568A (en) * | 2010-11-05 | 2011-04-27 | 意法·爱立信半导体（北京）有限公司 | Method and device for eliminating interference in mobile communication system |
| CN104025466A (en) * | 2011-12-21 | 2014-09-03 | 瑞典爱立信有限公司 | Finger placement in multi-stage interference cancellation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108604909A (en) | 2018-09-28 |
| WO2018098666A1 (en) | 2018-06-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7313750B1 (en) | Efficient soft decision demapper to minimize viterbi decoder complexity | |
| TWI382672B (en) | Progressive parallel interference canceller and method thereof and receiver thereof | |
| US8767889B2 (en) | Normalization of soft bit information for FEC decoding | |
| JP5400857B2 (en) | Apparatus, method and receiving terminal for LDPC decoding | |
| US8811545B2 (en) | Method for reducing interference in OFDM wireless networks | |
| WO2011111583A1 (en) | Receiving device, receiving method, receiving program, and processor | |
| US10404498B2 (en) | Precompensation of interference induced by an OFDM/OQAM modulation that is faster than Nyquist | |
| CN108604909B (en) | A kind of signal acceptance method and device | |
| US9088400B2 (en) | Hypotheses generation based on multidimensional slicing | |
| Gorlov et al. | Root-raised cosine versus optimal finite pulses for faster-than-Nyquist generation | |
| JP2009130486A (en) | Wireless communication system, and receiver | |
| CN114244670B (en) | Blind channel estimation method and system based on channel coding assistance | |
| JP6272583B1 (en) | Communication apparatus and received signal processing method | |
| Nguyen et al. | An intentional introduction of ISI combined with signal constellation size increase for extra gain in bandwidth efficiency | |
| WO2017096084A1 (en) | Method and system for demodulating high-order qam signals | |
| JP6884270B2 (en) | Devices and methods for demodulating received symbols | |
| JP6144846B2 (en) | Wireless communication apparatus and wireless communication system | |
| Déjardin et al. | On the iterative mitigation of clipping noise for COFDM transmissions | |
| KR101268751B1 (en) | Decoding and demodulating system in receiving stage and thereof method | |
| WO2013132887A1 (en) | Communication apparatus | |
| CN114598423B (en) | Method, device and medium for demodulation and decoding combined GMSK and LDPC | |
| JP5865084B2 (en) | Receiving apparatus and program | |
| US10951338B2 (en) | Soft value extraction method and device applicable to OvXDM system, and OvXDM system | |
| JP4704229B2 (en) | Receiver | |
| CN107634926B (en) | High-order modulation soft decision method combining channel information |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |