CN108604909A - A kind of signal acceptance method and device - Google Patents

A kind of signal acceptance method and device Download PDF

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Publication number
CN108604909A
CN108604909A CN201680059941.XA CN201680059941A CN108604909A CN 108604909 A CN108604909 A CN 108604909A CN 201680059941 A CN201680059941 A CN 201680059941A CN 108604909 A CN108604909 A CN 108604909A
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signal
disturbance estimation
obtains
phase noise
interference
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CN108604909B (en
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马修·考克顺
李永会
张昌明
蔡梦
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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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
    • H04B1/69—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 includes：The first signal is received, 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

A kind of signal acceptance method and device 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 utilization rate of frequency domain resource is can be improved in the FTN signal forming technique that transmitting terminal introduces.Specifically, FTN signal forming technique can improve the utilization rate of frequency domain resource by compressed signal bandwidth.But can be generated during compressed signal bandwidth intersymbol interference (inter-symbol 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 transmission performance of signal, 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 interference sections that the ISI that signal includes is introduced by lowest mean square (least mean square, LMS) algorithm.But receiving end can amplify white noise, so that the transmission performance of signal cannot be effectively improved during removing the interference sections that the ISI that signal includes is introduced by LMS algorithm.
Summary of the invention
The embodiment of the present invention provides a kind of signal acceptance method and device, amplifies white noise so that the transmission performance of signal cannot be effectively improved while removing the interference sections that the ISI that signal includes is introduced to solve the problem of.
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: to be received first comprising ISI First signal of the interference sections of introducing；Then linear equalization, demodulation decoding are carried out to the first signal, obtains second signal；The interference sections are estimated then according to second signal, obtain the first disturbance estimation signal；Subsequent, the first signal subtracts the first disturbance estimation signal, obtains third signal；Finally third signal demodulation is decoded, obtains the first output signal.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, technical solution provided in an embodiment of the present invention subtracts the first disturbance estimation signal by the first signal to remove the interference sections that the ISI that the first signal includes is introduced, and will not amplify white noise in this process.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 estimated according to the first output signal the interference sections, obtain the second disturbance estimation signal；First signal subtracts the second disturbance estimation signal, obtains fourth signal；Fourth signal demodulation is decoded, the second output signal is obtained.When specific implementation, in order to make the received output signal of the stay of two nights closest to original signal, the output signal that receiving end can obtain the last time is handled.The possible implementation, gives a kind for the treatment of process.
In a kind of possible design, the interference sections are estimated according to second signal, obtains the first disturbance estimation signal, may include: to be modulated to second signal, and convolution algorithm is carried out to the interference tap in the signal and ISI obtained after modulation, obtain the first disturbance estimation signal.
In a kind of possible design, linear equalization, demodulation decoding are carried out to the first signal, second signal is obtained, may include: that linear equalization, demodulation, deinterleaving and decoding are carried out to the first signal, obtain second signal.In this case, second signal is modulated, and convolution algorithm is carried out to the interference tap in the signal and ISI obtained after modulation, obtain the first disturbance estimation signal, it may include: that second signal is interleaved and is modulated, and convolution algorithm is carried out to the interference tap in the signal and ISI obtained after intertexture and modulation, obtain 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, may include: linear equal with phase noise compensation to the progress of the first signal Weighing apparatus, demodulation decoding, obtain second signal.The interference sections are estimated according to second signal, obtain the first disturbance estimation signal, it may include: to be modulated to second signal, and add the estimated value of phase noise, and the interference tap progress convolution algorithm in the signal and ISI for obtaining modulated and addition phase noise estimated value, obtain the first disturbance estimation signal, wherein the estimated value of phase noise is to execute the estimated value of phase noise used in the linear equalization with phase noise compensation.In this case, the first signal subtracts the first disturbance estimation signal, third signal is obtained, may include: that the first signal subtracts the first disturbance estimation signal, using obtaining third signal after phase noise compensation.
In a kind of possible design, linear equalization, demodulation decoding are carried out to the first signal, obtain second signal, may include: that the linear equalization with phase noise compensation, 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, 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.In this case, the first signal subtracts the first disturbance estimation signal, third signal is obtained, may include: that the first signal after phase noise compensation subtracts the first disturbance estimation signal, obtain third signal.
On the other hand, a kind of signal receiving device is provided, may include: receiving module, for receiving the first signal, wherein the first signal includes the interference sections that ISI is introduced；Module is obtained, for carrying out linear equalization to the first signal, demodulation decodes, and obtains second signal；Estimation module obtains the first disturbance estimation signal for estimating according to second signal the interference sections；Module is removed, the first disturbance estimation signal is subtracted for executing the first signal, obtains third signal；It obtains module to be also used to, third signal demodulation is decoded, the first output signal is obtained.
In a kind of possible design, estimation module is also used to, and is estimated according to the first input signal the interference sections, is obtained 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: second signal is modulated, And convolution algorithm is carried out to the interference tap in the signal and ISI obtained after modulation, obtain the first disturbance estimation signal.
It in a kind of possible design, obtains module and is specifically used for: linear equalization, demodulation, deinterleaving and decoding being carried out to the first signal, obtain second signal；Estimation module is specifically used for: being interleaved and modulates to second signal, and carry out convolution algorithm to the interference tap in the signal and ISI obtained after intertexture and modulation, obtains the first disturbance estimation signal.
In a kind of possible design, obtaining module specifically can be used for: carrying out the linear equalization with phase noise compensation, demodulation decoding to the first signal, obtains second signal.Estimation module specifically can be used for: be modulated to second signal, and add the estimated value of phase noise, and the interference tap progress convolution algorithm in the signal and ISI for obtaining modulated and addition phase noise estimated value, obtain the first disturbance estimation signal, wherein, the estimated value of phase noise is to execute the estimated value of phase noise used in the linear equalization with phase noise compensation.In this case, removal module specifically can be used for: executing the first signal and subtract 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: carrying out the linear equalization with phase noise compensation, demodulation decoding to the first signal, obtains second signal.Estimation module specifically can be used for: being modulated to second signal, and the interference tap in modulated obtained signal and ISI is carried out convolution algorithm, obtain the first disturbance estimation signal.In this case, removal module specifically can be used for: executing the first signal after phase noise compensation and subtract the first disturbance estimation signal, obtain third signal.
Another aspect, a kind of computer readable storage medium is provided, computer executed instructions are stored in computer readable storage medium, when at least one processor of FTN reception device executes the computer executed instructions, FTN reception device executes 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, which stores in a computer-readable storage medium；At least one processor of FTN reception device can be read from computer readable storage medium should Computer executed instructions, at least one processor execute the computer executed instructions and FTN reception device are made to implement signal acceptance method provided by any possible implementation of above-mentioned aspect or above-mentioned aspect.
Understandably, the any FTN reception device or computer storage medium of above-mentioned offer are used to execute signal acceptance method presented above, therefore, attainable beneficial effect can refer to the beneficial effect in corresponding signal acceptance method presented above, 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 be right Information source generate original signal encoded, modulate and FTN signal molding etc. so that original signal is converted to the FTN signal that can be transmitted in the channel.Then, FTN signal reaches receiving end by transmission, wherein FTN signal passes through channel response during transmission, while will receive the influence of white noise.Receiving end receives after FTN signal, FTN matched filtering is first carried out, then the interference sections introduced according to the ISI that the FTN signal that LMS algorithm removal receives includes, and the signal after the interference sections introduced to removal ISI carries out demodulation decoding, obtain output 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, and the stay of two nights of receiving end is for receiving output signal.Channel is the transmission environment of FTN signal, and channel can include but is not limited to additive white Gaussian noise (additive white gaussian noise, AWGN) channel and multipath channel etc..White noise can be introduced into transmitting terminal, channel, receiving end, all be unified in Fig. 1 equivalent among channel.The FTN matched filtering of receiving end is used to filter out the interference outside band and noise, and signal-to-noise ratio can be improved.Receiving end can amplify white noise, so that the transmission performance of FTN signal cannot be effectively improved during the interference sections that the ISI received according to LMS algorithm removal is introduced.
Based on this, the embodiment of the invention provides a kind of technical solutions: the signal after receiving end is decoded according to linear balanced, demodulation constructs disturbance estimation signal, wherein, disturbance estimation signal is the estimated result of the interference sections for the ISI introducing that the FTN signal that receiving end receives includes；Then, receiving end executes the FTN signal received and subtracts disturbance estimation signal, and carries out demodulation decoding, obtains output signal；Finally, receiving end exports output signal to the stay of two nights.In this process, receiving end will not amplify white noise, 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, it can be also used for other systems that can introduce ISI, solve the problem of that the transmission performance of signal cannot be effectively improved by amplifying white noise while removing the interference sections that the ISI that signal includes is introduced.
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, Fig. 2 institute The FTN signal transmission system shown includes: transmitting terminal, channel and receiving end.The treatment process for the original signal that transmitting terminal generates information source is identical as the treatment process of original signal that the transmitting terminal in FTN signal transmission system shown in FIG. 1 generates information source.Receiving end may refer to hereafter the treatment process of the FTN signal received.
" first " and " second " herein etc. is not do any other restriction to more clearly distinguish different objects." 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 comprise steps of S101~S105:
S101: receiving end receives the first signal.Wherein, the first signal includes the interference sections that ISI is introduced.
The signal that first signal can be the FTN signal channel transmission of transmitting terminal transmission and obtain after being influenced by white noise etc..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 includes useful tap and interference tap, the maximum tap of energy is useful tap in ISI, and other taps are interference taps, if being reference position by the position mark of useful tap actuating signal, then other taps act on the front and back of signal reference position, as shown in Figure 4.
It should be noted that the interference sections that the ISI that the first signal includes is introduced may include the interference sections for the ISI introducing that FTN technology generates under awgn channel environment.Under a multipath channel environment, the interference sections that the ISI that the first signal includes is introduced may include the interference sections for the ISI introducing that FTN technology and multipath channel joint generate.
S102: receiving end carries out linear equalization to the first signal, demodulation decodes, and obtains second signal.
It receiving end can be according to any to the first signal progress linear equalization in LMS, recurrence least square (recursive least square, RLS) algorithm etc..If receiving end carries out linear equalization to the first signal according to LMS algorithm, 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.Since the exact value of the ISI that the first signal the includes interference sections and white noise introduced is unknowable, receiving end cannot obtain accurate original signal, it therefore, can be according to the estimated value of original signal (such as second signal or first output signal or the second output signal hereinafter) building disturbance estimation signal in technical solution provided in an embodiment of the present invention.
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 output to the stay of two nights, and meeting receiving end is further processed.After receiving end executes S102, it will continue to execute S103-S105.The process schematic of S103-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 carries out convolution algorithm to the interference tap in the signal and ISI obtained after modulation, 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, thus the interference sections that the ISI in the first signal of removal is introduced.
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, the second output signal is obtained, and the second output signal is exported to the stay of two nights.The process schematic of S106~S108, 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, receive The output signal that end can obtain the last time is handled, and treatment process may refer to S106~S108.For example, the interference sections are estimated according to the first output signal obtained in S105 in receiving end, the second disturbance estimation signal is obtained, then the first signal subtracts the second disturbance estimation signal, finally exports the second output signal obtained in S108 to the stay of two nights.Optionally, the preset threshold of the number (hereinafter referred to the number of iterations) of the treatment process for the interference sections that the ISI that receiving end can be set that the first signal of removal includes is introduced.S103~S105 may be considered in technical solution provided in an embodiment of the present invention, and receiving end removes the first time iteration for the interference sections that the ISI that the first signal includes is introduced.S106~S108 may be considered in technical solution provided in an embodiment of the present invention, and 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, 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 exports output signal to the stay of two nights.Wherein, FTN signal transmission system performance convergence it is to be understood that certain iteration terminate after receiving end obtain 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 to received first signal, demodulation decodes to obtain second signal, then, the interference sections are estimated according to second signal, obtain the first disturbance estimation signal, it is subsequent, first signal subtracts the first disturbance estimation signal, the first output signal is obtained, finally, exporting the first output signal 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, technical solution provided in an embodiment of the present invention subtracts the first disturbance estimation signal by the first signal to remove the interference sections that the ISI that the first signal includes is introduced, and will not amplify white noise in this process.Therefore, technical solution provided in an embodiment of the present invention can effectively improve the transmission performance of FTN signal.
Optionally, it after the original signal that transmitting terminal generates information source encodes, can be interleaved, then be modulated and formed with FTN signal.In this case, S102 may include: Receiving end carries out linear equalization, demodulation, deinterleaving and decoding to the first signal, obtains second signal.S103 may include: that receiving end is interleaved and modulates to second signal, and carries out convolution algorithm to the interference tap in the signal and ISI obtained after intertexture and modulation, obtain the first disturbance estimation signal.Based on this, a kind of schematic diagram of FTN signal transmission system can be as shown in Figure 8.
Optionally, transmitting terminal carries out that phase noise can be generated because of the non-ideal characteristic of up-conversion carrier wave after the molding of FTN signal, and receiving end also can be because the non-ideal characteristic of down coversion carrier wave generates 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, second signal is obtained.Wherein, the linear equalization implementation with phase noise compensation can be to be performed separately linear equalization and phase noise compensation, or execute linear equalization and phase noise compensation together.Wherein, when receiving end carries out phase noise compensation to the first signal, 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 noise compensation.Since FTN signal transmission system is a linear time invariant system, phase noise is a slow change process in the time domain, it may be regarded as within the scope of an ISI response length constant, therefore, in the embodiment of the present invention, the estimated value for the phase noise that the estimated value for the phase noise that receiving end is generated according to transmitting terminal 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 add the estimated value of phase noise, and the interference tap progress convolution algorithm in the signal and ISI for obtaining modulated and addition phase noise estimated value, obtain the first disturbance estimation signal, wherein, the estimated value of phase noise is to execute phase noise value estimated in the linear equalization with phase noise compensation.In this case, S104 may include: that receiving end the first signal of execution subtracts the first disturbance estimation signal, third signal is obtained using phase noise compensation.The schematic diagram of one of optional implementation FTN signal transmission 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 carries out convolution fortune to the interference tap in the signal and ISI obtained after modulation It calculates, 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, third signal is obtained.The schematic diagram of one of optional implementation FTN signal transmission system can be as shown in Figure 10, and Figure 10 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 known pilot of the transmitting terminal to constellation point symbol, wherein, the position can be before position between two sections of constellation point symbols of arbitrary neighborhood and first segment constellation point symbol and after final stage constellation point symbol；Then, in phase noise compensation, the pilot tone of the position is extracted in receiving end, and compares with known pilot, calculates phase difference value；Subsequent, receiving end fits the estimated value of phase noise according to phase difference value and linear interpolation fitting process；Finally, receiving end, which reversely rotates angle shown in the estimated value of phase noise, can be completed compensation.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 integers.Position before per position between two sections of adjacent constellation point symbols and first segment constellation point symbol and after final stage constellation point symbol, can be inserted known pilot, as shown in figure 11.Known pilot can include but is not limited to binary phase shift keying (binary phase shift keying, the BPSK) symbol being made of {+1, -1 }.
Signal acceptance method provided above is illustrated below by a specific example.
Assuming that signal bandwidth is 50 megahertzs, coding mode is low-density checksum (the low density parity check code that code rate is 0.8, LDPC) code, the channel circumstance of consideration is AWGN, the phase noise intensity for receiving and dispatching both ends is -95dBc/Hz@100KHz, the known pilot that a length is 1 is inserted at interval of 20 useful modulated signals, it is known that pilot tone selects BPSK symbol.So, the Performance Simulation Results of the signal transmission based on Matlab are shown in Fig.12.Wherein, τ indicates that FTN compressed signal bandwidth ratio, ite. indicate the number of iterations.Curve 1, curve 2 are respectively 16384 quadrature amplitude modulation (quadrature Amplitude modulation, QAM) and 4096QAM under, also and ISI is not present in the transmission performance situation of signal in conventional Nyquist signal transmission system, i.e. not compressed signal frequency spectrum (τ=1).Curve 3, curve 4, curve 5 and curve 6 are the transmission performance situations of FTN signal under different situations, and modulation system 4096QAM, FTN Spectrum compression ratio τ is 6/7.Wherein, 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 are respectively the transmission performance situation 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.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 performance of FTN signal transmission 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 the spectrum efficiency of when τ is 1 corresponding conventional Nyquist signal transmission system and modulation system are 4096QAM, and the spectrum efficiency of when τ is 6/7 corresponding FTN signal transmission system 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/N0Reduce 3.3dB.E in curve 5 and curve 6b/N0Relative to the E in curve 1b/N0Reduce 4.6dB, and the transmission performance value of FTN signal with the transmission performance value ideally shown in curve 2 without ISI tends to be identical in this case, obviously, relative to prior art as shown in Figure 1, technical solution provided in an embodiment of the present invention can effectively improve the transmission performance of FTN signal, 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 receiving end, which contains, executes the corresponding hardware configuration of each function and/or software module in order to realize above-mentioned each function.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 algorithm steps, and the application can be realized with the combining form of hardware or hardware and computer software.Some functions is executed in a manner of hardware or computer software driving hardware actually, depending on the specific of technical solution Using and design constraint.Professional technician can use different methods to achieve the described function each specific application, but this realization is it is not considered that exceed 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 other processes for techniques described herein.S102, S105 and S108 etc. in Fig. 3, and/or other processes for techniques described herein can be executed by obtaining module 1302.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 inferred to according to each step in each method embodiment presented above, or can be with reference to content provided by Summary above, and 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 receiving device 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 processor, 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, which may be implemented or executes, combines various illustrative logic blocks, module and circuit described in present disclosure.The processor is also possible to realize the combination of computing function, such as combines comprising one or more microprocessors, DSP and the combination of microprocessor etc..Memory 1403 is for storing computer executed instructions, and when receiving end 13 is run, processor 1401 executes the computer executed instructions that memory 1403 stores, so that receiving end 13 executes any one signal acceptance method provided in an embodiment of the present invention.Specific signal acceptance method can refer to above and attached drawing In associated description, details are not described herein again.Memory 1403 may include volatile memory, such as random access memory (random access memory, RAM), memory 1403 also may include nonvolatile memory, such as read-only memory (read only memory, ROM), flash memory, hard disk drive (hard-disk drive,) or solid state hard disk (solid state drives HDD, SSD), memory 1403 can also include the combination of the memory of 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..Only to be indicated with a thick line in Figure 14, it is not intended that an only bus or a type of bus convenient for indicating.
The step of method in conjunction with described in present disclosure or algorithm, can be realized in a manner of hardware, be also possible to execute the mode of software instruction by processing module to realize.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), in the storage medium of Electrically Erasable Programmable Read-Only Memory (electrically EPROM, EEPROM), register, hard disk, mobile hard disk, CD-ROM (CD-ROM) or any other form well known in the art.A kind of illustrative storage medium is coupled to processor, to enable a processor to from the read information, and information can be written to the storage medium.Certainly, storage medium is also possible to the component part of processor.Pocessor and storage media can be located in ASIC.
It will be appreciated that in said one or multiple examples, function described herein can be realized those skilled in the art with hardware, software, firmware or their any combination.When implemented in software, these functions can be stored in computer-readable medium or as on computer-readable medium one or more instructions or code transmit.Computer-readable medium includes computer storage media and communication media, and wherein communication media includes convenient for from a place to any medium of another place transmission computer program.Storage medium can be general Or any usable medium that special purpose computer can access.

Claims (12)

  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.
  2. The method according to claim 1, wherein the method also includes:
    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.
  3. Method according to claim 1 or 2, which is characterized in that the interference sections are estimated according to the second signal, obtain the first disturbance estimation signal, comprising:
    The second signal is modulated, and convolution algorithm is carried out to the interference tap in the signal and the ISI obtained after modulation, obtains the first disturbance estimation signal.
  4. According to the method described in claim 3, it is characterized in that, obtaining second signal to first signal progress linear equalization, demodulation decoding, comprising:
    Linear equalization, demodulation, deinterleaving and decoding are carried out to first signal, obtain second signal；
    The second signal is modulated, and convolution algorithm is carried out to the interference tap in the signal and the ISI obtained after modulation, obtains the first disturbance estimation signal, comprising:
    The second signal is interleaved and is modulated, and convolution algorithm is carried out to the interference tap in the signal and the ISI obtained after intertexture and modulation, obtains the first disturbance estimation signal.
  5. Method according to any one of claims 1 to 3, which is characterized in that linear equalization, demodulation decoding are carried out to first signal, obtain 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 algorithm is carried out to the interference tap in the signal and the ISI obtained after modulation, obtains the first disturbance estimation signal, comprising:
    The second signal is modulated, and add the estimated value of phase noise, and the interference tap progress convolution algorithm in the signal and the ISI for obtaining modulated and addition phase noise estimated value, obtain 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.
  6. Method according to any one of claims 1 to 3, which is characterized in that linear equalization, demodulation decoding are carried out to first signal, obtain 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.
  7. 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, Obtain 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.
  8. Device according to claim 7, which is characterized in that
    The estimation module is also used to, and is estimated according to first output signal the interference sections, is obtained the second disturbance 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.
  9. Device according to claim 7 or 8, which is characterized in that
    The estimation module is specifically used for: being modulated to the second signal, and carries out convolution algorithm to the interference tap in the signal and the ISI obtained after modulation, obtains the first disturbance estimation signal.
  10. Device according to claim 9, which is characterized in that
    The acquisition module is specifically used for: carrying out linear equalization, demodulation, deinterleaving and decoding to first signal, obtains second signal；
    The estimation module is specifically used for: the second signal being interleaved and modulated, and carries out convolution algorithm to the interference tap in the signal and the ISI obtained after intertexture and modulation, obtains the first disturbance estimation signal.
  11. Device according to any one of claims 7 to 9, which is characterized in that
    The acquisition module is specifically used for: carrying out the linear equalization with phase noise compensation, demodulation decoding to first signal, obtains second signal；
    The estimation module is specifically used for: being modulated to the second signal, and add the estimated value of phase noise, and the interference tap progress convolution algorithm in the signal and the ISI for obtaining modulated and addition phase noise estimated value, obtain 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；
    The removal module is specifically used for: executing first signal and subtracts first disturbance estimation signal, obtains third signal using phase noise compensation.
  12. Device according to any one of claims 7 to 9, which is characterized in that
    The acquisition module is specifically used for: carrying out the linear equalization with phase noise compensation, demodulation decoding to first signal, obtains second signal；
    The removal module is specifically used for: executing first signal after phase noise compensation and subtracts first disturbance estimation signal, obtains third signal.
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