CN109327277A - The signal processing method and device of overlapping multiplexing system and overlapping multiplexing system - Google Patents
The signal processing method and device of overlapping multiplexing system and overlapping multiplexing system Download PDFInfo
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- CN109327277A CN109327277A CN201710643334.4A CN201710643334A CN109327277A CN 109327277 A CN109327277 A CN 109327277A CN 201710643334 A CN201710643334 A CN 201710643334A CN 109327277 A CN109327277 A CN 109327277A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
- H04L1/0047—Decoding adapted to other signal detection operation
- H04L1/005—Iterative decoding, including iteration between signal detection and decoding operation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0071—Use of interleaving
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0618—Space-time coding
- H04L1/0637—Properties of the code
- H04L1/0668—Orthogonal systems, e.g. using Alamouti codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
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Abstract
The invention discloses the signal processing methods and device of a kind of overlapping multiplexing system and overlapping multiplexing system.Wherein, which includes: coding side interleaver, is interleaved processing for treating encoded signal；First overlapping multiplexing encoder and the second overlapping multiplexing encoder, the input terminal of second overlapping multiplexing encoder is connected with interleaver, wherein, first overlapping multiplexing encoder is encoded for treating encoded signal, obtain first via coding result, second overlapping multiplexing encoder obtains the second tunnel coding result for encoding to the signal to be encoded after interleaving treatment；Adder is connected with the output end of the first overlapping multiplexing encoder and the second overlapping multiplexing encoder respectively, for carrying out orthogonal superposition to first via coding result and the second tunnel coding result, obtains the coding output result of overlapping multiplexing system.The present invention solves the lower technical problem of system gain of overlapping multiplexing system in the prior art.
Description
Technical field
The present invention relates to field of signal processing, in particular to a kind of overlapping multiplexing system and overlapping multiplexing system
Signal processing method and device.
Background technique
Intersymbol overlapping is utilized in overlapping multiplexing system, constructs intersymbol coding bound relationship, is closed by constraint
The transmission reliability of system improves, so as to realize high-frequency efficiency transmission, but in reality to obtain corresponding system gain in system
In the application of border, the higher the better for the gain of system, and the gain of overlapping multiplexing system is not still able to satisfy part scene in the prior art
Demand.
For the lower problem of the system gain of overlapping multiplexing system in the prior art, effective solution is not yet proposed at present
Scheme.
Summary of the invention
The embodiment of the invention provides the signal processing methods and dress of a kind of overlapping multiplexing system and overlapping multiplexing system
It sets, the lower technical problem of the system gain at least to solve overlapping multiplexing system in the prior art.
According to an aspect of an embodiment of the present invention, a kind of overlapping multiplexing system is provided, comprising: coding side interleaver,
Processing is interleaved for treating encoded signal；First overlapping multiplexing encoder and the second overlapping multiplexing encoder, the second overlapping
The input terminal of multiplexing and encoding device is connected with interleaver, wherein the first overlapping multiplexing encoder is compiled for treating encoded signal
Code obtains first via coding result, and the second overlapping multiplexing encoder is used to encode the signal to be encoded after interleaving treatment,
Obtain the second tunnel coding result；Adder, respectively with the output of the first overlapping multiplexing encoder and the second overlapping multiplexing encoder
End is connected, and for carrying out orthogonal superposition to first via coding result and the second tunnel coding result, obtains the volume of overlapping multiplexing system
Code output result.
Further, the first overlapping multiplexing encoder and the second overlapping multiplexing encoder are that two identical overlapping multiplexings are compiled
Code device.
Further, the first overlapping multiplexing encoder and the second overlapping multiplexing encoder pass through two different channels respectively
Export corresponding coding result.
Further, system further include: the first overlapping multiplexing decoder and the second overlapping multiplexing decoder, wherein first
The output end of overlapping multiplexing decoder is connected by decoding end interleaver with the input terminal of the second overlapping multiplexing decoder, the second weight
The output end of folded multiplexed decoded device is connected by the first deinterleaver with the input terminal of the first overlapping multiplexing decoder；First overlapping
Multiplexed decoded device be used for channel transmission after first via coding result and the first prior information be decoded, obtain the first solution
Code result, wherein second decoding result of first prior information according to transmission information characteristics and/or after deinterleaving obtains, and transmits
Information characteristics are determined according to signal to be encoded and the first overlapping multiplexing decoder；Second overlapping multiplexing decoder, for according to the
The second tunnel coding result after two prior informations and channel transmission, obtains the second decoding result, wherein the second prior information root
The first decoding result according to transmission information characteristics and after interweaving obtains；Wherein, the coding output result after channel transmission is torn open
The second tunnel coding result after first via coding result and channel transmission after getting channel transmission.
Further, system further include: decoding end interleaver is connected to the output end and the of the first overlapping multiplexing decoder
The input terminal of two overlapping multiplexed decoded devices, for being interleaved processing to the first decoding result；Deinterleaver is connected to the second weight
The output end of folded multiplexed decoded device and the input terminal of the first overlapping multiplexing decoder, for being deinterleaved to the second decoding result
Processing.
Further, system further include: the second deinterleaver is connected with the second overlapping multiplexing decoder, for second
Decoding result is deinterleaved processing；Decision device is connected with the second deinterleaver, for according to deinterleave treated second solution
Code result makes decisions, and determines the decoding result of overlapping multiplexing system.
Further, two different channels are respectively I channel and Q channel.
According to another aspect of an embodiment of the present invention, a kind of signal processing method of overlapping multiplexing system is additionally provided, is wrapped
It includes: signal to be encoded is interleaved processing；Encoded signal progress overlapping multiplexing is treated to encode to obtain first via coding result, it is right
Signal to be encoded after interleaving treatment carries out overlapping multiplexing and encodes to obtain the second tunnel coding result；By first via coding result and
Two tunnel coding results carry out orthogonal superposition, obtain the coding output result of overlapping multiplexing system.
Further, to after channel transmission first via coding result and the first prior information be decoded, obtain the
One decoding result, wherein the first prior information is obtained according to transmission information characteristics, transmission information characteristics according to signal to be encoded and
Overlapping multiplexing decoder determines；The second tunnel coding result after second prior information and channel transmission is decoded, is obtained
Second decoding result, wherein first decoding result of second prior information according to transmission information characteristics and after interweaving obtains；Its
In, the coding output result after channel transmission is split to obtain the first via coding result after channel transmits and channel passes
The second tunnel coding result after defeated.
Further, using the second decoding result and transmission information characteristics as the first prior information, after channel transmission
First via coding result and the first prior information be decoded, obtain the first decoding result；To the second prior information and through believing
The second tunnel coding result after road transmission is decoded, and obtains the second decoding result.
Further, when the number of iterations reaches preset times, determine that the second decoding result is the decoding of signal to be encoded
As a result, wherein an iteration includes: to generate first decoding result and second decoding result respectively.
According to another aspect of an embodiment of the present invention, a kind of signal processing apparatus of overlapping multiplexing system is additionally provided, is wrapped
It includes: interleaving treatment module, for signal to be encoded to be interleaved processing；Coding module carries out weight for treating encoded signal
Folded multiplexing and encoding obtains first via coding result, carries out overlapping multiplexing to the signal to be encoded after interleaving treatment and encodes to obtain second
Road coding result；Addition module is overlapped for first via coding result and the second tunnel coding result to be carried out orthogonal superposition
The coding of multiplex system exports result.
According to another aspect of an embodiment of the present invention, a kind of storage medium is additionally provided, storage medium includes the journey of storage
Sequence, wherein equipment where control storage medium executes the signal of the overlapping multiplexing system of above-mentioned any one in program operation
Processing method.
According to another aspect of an embodiment of the present invention, a kind of processor is additionally provided, processor is used to run program,
In, program executes the signal processing method of the overlapping multiplexing system of above-mentioned any one when running.
In embodiments of the present invention, signal to be encoded is interleaved processing, the input signal after obtaining interleaving treatment, point
Signal to be encoded after not treating encoded signal and interleaving treatment carries out overlapping multiplexing coding, two-way coding result is obtained, by two
Road coding result orthogonal superposition obtains the coding output result of overlapping multiplexing system.Above scheme is handed over by being added in coding side
Device is knitted, to realize the parallel cascade of two encoders, by the parallel cascade structure of two encoders, utilizes coding bound
Relationship can construct the communication system of parallel cascade, further improve system gain using intersymbol coding bound relationship, solution
The lower technical problem of the system gain for the overlapping multiplexing system in the prior art of having determined, makes system performance get a promotion.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the structure chart of overlapping multiplexing system according to an embodiment of the present invention；
Fig. 2 is a kind of schematic diagram of the coding side to optional OvFDM system according to embodiments of the present invention；
Fig. 3 is the schematic diagram according to a kind of decoding end of overlapping multiplexing system of the embodiment of the present application；
Fig. 4 is the schematic diagram according to a kind of OvFDM encoder of the embodiment of the present application；
Fig. 5 is the flow chart of the signal processing method of overlapping multiplexing system according to an embodiment of the present invention；
Fig. 6 is a kind of block diagram of OvFDM transmitting signal according to an embodiment of the present invention；
Fig. 7 is a kind of schematic diagram of the additive process of OvFDM transmitting signal according to an embodiment of the present invention；
Fig. 8 is the schematic diagram that a kind of OvFDM according to an embodiment of the present invention receives signal；And
Fig. 9 is the schematic diagram of the signal processing apparatus of overlapping multiplexing system according to an embodiment of the present invention.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein can in addition to illustrating herein or
Sequence other than those of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that cover
Cover it is non-exclusive include, for example, the process, method, system, product or equipment for containing a series of steps or units are not necessarily limited to
Step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, product
Or other step or units that equipment is intrinsic.
Embodiment 1
According to embodiments of the present invention, a kind of embodiment of overlapping multiplexing system is provided, Fig. 1 is according to embodiments of the present invention
Overlapping multiplexing system structure chart, as shown in Figure 1, the system includes:
Coding side interleaver 10 is interleaved processing for treating encoded signal.
Specifically, the interleaving scheme of above-mentioned interleaver can be regular intertexture, spiral intertexture, pseudo random interleaving etc..Such as:
System input is the bit stream that length is N, and only the data instance of 8 bits illustrates in the past here, x=+1 ,+1, -1 ,+1, -
1, -1 ,+1 ,+1 ... }, the data flow after interweaving is x '={ -1, -1 ,+1, -1 ,+1, -1 ,+1 ,+1 ... }.
First overlapping multiplexing encoder 20 and the second overlapping multiplexing encoder 30, the input terminal of the second overlapping multiplexing encoder
It is connected with interleaver, wherein the first overlapping multiplexing encoder is encoded for treating encoded signal, obtains first via coding knot
Fruit, the second overlapping multiplexing encoder obtain the second tunnel coding result for encoding to the signal to be encoded after interleaving treatment.
Adder 40 is connected with the output end of the first overlapping multiplexing encoder and the second overlapping multiplexing encoder respectively, uses
In carrying out orthogonal superposition to first via coding result and the second tunnel coding result, the coding output knot of overlapping multiplexing system is obtained
Fruit.
Fig. 2 is a kind of schematic diagram of the coding side to optional OvFDM system according to embodiments of the present invention, optional in one
Embodiment in, by taking OvFDM as an example, as shown in connection with fig. 2, input signal is by generating two after interleaver (interleaved symbol)
Road input signal xnAnd xn', xnIt is encoded to obtain x by OvFDM encoder 1n I, xn' encoded by OvFDM encoder 2
Obtain xn Q, xn IAnd xn QOrthogonal superposition is carried out by adder, takes imaginary number j and x on the road Qn QIt is multiplied, so that after two-way orthogonal superposition
The signal of plural form is constituted, the as coding of OvFDM system exports result.
Herein it should be noted that above-mentioned overlapping multiplexing system not only can be OvFDM (Overlapped
Frequency Division Multiplexing, the multiplexing of time domain frequency division superimposed coding), it can be applied in OvTDM
(Overlapped Time Division Multiplexing, the multiplexing of time domain time-division superimposed coding) system or OvCDM
(Overlapped Code Division Multiplexing, time domain code point superimposed coding are multiplexed).Such as when side of the invention
Case is applied when in OvTDM system, and the first overlapping multiplexing encoder 20 and the second overlapping multiplexing in the corresponding system of Fig. 1 are compiled
Code device 30 corresponds to two OvTDM encoders, to handle corresponding data under OvTDM system.
From the foregoing, it will be observed that the application above scheme by coding side be added interleaver, to realize two encoders
Parallel cascade can construct the communication system of parallel cascade using coding bound relationship by the parallel cascade structure of two encoders
System, further improves system gain using intersymbol coding bound relationship, solves overlapping multiplexing system in the prior art
The lower technical problem of system gain, so that system performance is got a promotion.
Optionally, it is according to the above embodiments of the present application, the first overlapping multiplexing encoder and the second overlapping multiplexing encoder
Two identical overlapping multiplexing encoders.
Optionally, according to the above embodiments of the present application, the first overlapping multiplexing encoder and the second overlapping multiplexing encoder point
It Tong Guo not the corresponding coding result of two channels outputs.Optionally, above-mentioned two channel is respectively I channel and Q channel.Above-mentioned
In scheme, since system introduces I, Q two-way transmission data, system reliability also gets a promotion.
Specifically, the first overlapping multiplexing encoder and the second overlapping multiplexing encoder can be as shown in figure 4, a kind of optional
Embodiment in, Fig. 4 is according to a kind of encoder of the embodiment of the present application is be overlapped multiplexing and encoding device schematic diagram, in conjunction with Fig. 4
Shown, signal x is being divided into two paths of signals after interleaver, and every road signal is by S/P (serial/parallel, serioparallel exchange
Device) after respectively obtain the road K1 signal, each signal in the signal of the road K1 and corresponding code word
It is added after carrying out convolution extension, obtains the road I signal and the road Q signal.The road I signal with the road Q signal after being added, then respectively with K2 λIt is a
CoefficientAfter multiplication, the result of multiplication is added, and it is anti-to carry out fourier to the result of addition
Transformation obtains coding output as a result, the spectrum efficiency of system improves K2 times compared to traditional Transmission system.
Optionally, according to the above embodiments of the present application, system further include:
First overlapping multiplexing decoder and the second overlapping multiplexing decoder, wherein the output of the first overlapping multiplexing decoder
End is connected by decoding end interleaver with the input terminal of the second overlapping multiplexing decoder, the output end of the second overlapping multiplexing decoder
It is connected by the first deinterleaver with the input terminal of the first overlapping multiplexing decoder.
First overlapping multiplexing decoder be used for channel transmission after first via coding result and the first prior information into
Row decoding, obtains the first decoding result, wherein the first prior information is according to second after transmission information characteristics and/or deinterleaving
Decoding result obtains, and transmission information characteristics are determined according to signal to be encoded and the first overlapping multiplexing decoder.
Specifically, the first prior information is transmission information characteristics when the first overlapping multiplexing decoder when decoding for the first time, when
First overlapping multiplexing decoder carry out it is non-decode for the first time when, the first prior information by transmission information characteristics and after deinterleaving the
Two decoding results are overlapped to obtain.In an alternative embodiment, it if transmission information characteristics are 0, is solved for the first time non-
When code, the first prior information is the second decoding result after deinterleaving.
Specifically, above-mentioned transmission information characteristics can be determined according to data to be encoded itself with overlapping multiplexing decoder,
In an alternative embodiment, determine data to be encoded be independent same distribution, then each data be 0 or be 1 probability be
Identical, if overlapping multiplexing encoder uses lg (a/b), (probability that a occurs in data 0, b are the general of 1 appearance in data
Rate) determine transmission information characteristics, then transmitting information characteristics is lg (50%/50%)=0.
Second overlapping multiplexing decoder, for encoding knot according to the second tunnel after the second prior information and channel transmission
Fruit obtains the second decoding result, wherein first decoding result of second prior information according to transmission information characteristics and after interweaving obtains
It arrives, wherein the coding output result after channel transmission is split to obtain the first via coding result after channel transmits and warp
The second tunnel coding result after transmission.
Since no matter whether the second overlapping multiplexing decoder is to decode for the first time, the second overlapping multiplexing decoder can cross reception
The first decoding result after to intertexture, therefore first decoding result of second prior information according to transmission information characteristics and after interweaving
It obtains.In the case where transmitting information characteristics is 0, the second prior information is the first decoding result after interweaving.
Optionally, according to the above embodiments of the present application, above system further include:
Decode end interleaver, be connected to the first overlapping multiplexing decoder output end and the second overlapping multiplexing decoder it is defeated
Enter end, for being interleaved processing to the first decoding result.Specifically, above-mentioned interleaving treatment is used for matched data sequence.
First deinterleaver, be connected to the second overlapping multiplexing decoder output end and the first overlapping multiplexing decoder it is defeated
Enter end, for being deinterleaved processing to the second decoding result.Specifically, above-mentioned deinterleaving processing is used for matched data sequence.
Optionally, according to the above embodiments of the present application, above system further include:
Second deinterleaver is connected with the second overlapping multiplexing decoder, for being deinterleaved place to the second decoding result
Reason.
Decision device is connected with the second deinterleaver, for treated that the second decoding result makes decisions according to deinterleaving,
Determine the decoding result of overlapping multiplexing system.
In an alternative embodiment, Fig. 3 is the decoding end according to a kind of overlapping multiplexing system of the embodiment of the present application
Schematic diagram, as shown in connection with fig. 3, coding side output signal by AWGN (Additive White Gaussian Noise,
Additive white Gaussian noise) channel, after the interference of additive white Gaussian noise, receiver is detected using iterative receiver.
Its receiving end decoding architecture is as shown in Fig. 3.
Still by taking OvFDM as an example, which mainly includes two software- redundancy (Soft corresponding with encoder
Input Soft Output, SISO) OvFDM decoder and intertexture deinterleaver.Wherein each OvFDM decoder, including two
Input information and an output information.In this example, it is illustrated with transmitting information characteristics as 0, in first time iteration,
OvFDM decoder 1 is according to receiving the reception signal r from I channelrealExport the Soft Inform ation L about input signala1, La1It is logical
The interleaver for crossing decoding end obtains the second prior information L of OvFDM decoder 2a2。La2With the reception signal I from Q channelimag
Together as the input signal of OvFDM decoder 2, OvFDM decoder 2 is decoded according to input signal, obtains Le2Decoding knot
Fruit.
Then decoding result L first time iteration obtainede2As the first prior information of OvFDM decoder 1, and come from
The reception signal r of I channelrealTogether as the input signal of OvFDM decoder 1, it is next to start to repeat above-mentioned steps
Secondary iteration.Can constantly approach the performance of optimal algorithm after iterating, the number of iterations mostly closer to optimal performance,
But complexity and time delay are also higher.Therefore, it can need using the faster algorithm of convergence rate and iterator mechanism, with less
The number of iterations reaches preferable performance.Common soft decoding method includes bcjr algorithm, MAP, Log-MAP algorithm etc..
From the foregoing, it will be observed that interleaver is added between the IQ two-way of parallel cascade OvFDM system in the application above scheme, two are obtained
Encoded output stream due to the presence of interleaver and it is different.Due to devising interleaver in input terminal, corresponding use in receiving end changes
When generation decoding, the Soft Inform ation that a branch is obtained is as the prior information of another branch, the mutual iteration interaction of two decoders
Information, final error probability will be greatly reduced after successive ignition, and then improve decoding performance.
Embodiment 2
According to embodiments of the present invention, a kind of embodiment of the signal processing method of overlapping multiplexing system is provided, is needed
Bright, step shown in the flowchart of the accompanying drawings can be held in a computer system such as a set of computer executable instructions
Row, although also, logical order is shown in flow charts, and it in some cases, can be to be different from sequence herein
Execute shown or described step.
Fig. 5 is the flow chart of the signal processing method of overlapping multiplexing system according to an embodiment of the present invention, as shown in figure 5,
This method comprises the following steps:
Signal to be encoded is interleaved processing by step S502.
Specifically, can realize above-mentioned intertexture by interleaver, above-mentioned interleaving scheme can be rule intertexture, spiral is handed over
It knits, pseudo random interleaving etc..Such as: system input is the bit stream that length is N, and only the data instance of 8 bits is said in the past here
It is bright, x={+1 ,+1, -1 ,+1, -1, -1 ,+1 ,+1 ... }, interweave after data flow be x '=- 1, -1 ,+1, -1 ,+1, -1,
+1,+1……}。
Step S504 treats encoded signal progress overlapping multiplexing and encodes to obtain first via coding result, after interleaving treatment
Signal to be encoded carry out overlapping multiplexing encode to obtain the second tunnel coding result.
Specifically, can be encoded by two identical overlapping multiplexing encoders to above-mentioned two-way input signal, obtain
To corresponding coding result.
In an alternative embodiment, still by taking OvFDM as an example, coding output is being generated by coding side as a result, giving birth to
At send signal after, can by the following method to send signal be modulated, OvFDM emit signal diagram as shown in fig. 6,
The arrangement of symbol additive process parallelogram is as shown in Fig. 7, the specific steps are as follows:
(1) the spectrum signal H (f) for sending signal is firstly generated；
(2) (1) spectrum signal H (f) generated is formed into other each frequencies after specific carriers spectrum intervals △ B displacement
The subcarrier spectrum waveform H (f-i × △ B) of △ B is divided between spectrum；
(3) the symbol X that will be sentiThe corresponding each subcarrier spectrum wave H (f-i × △ B) generated respectively with (2)
It is multiplied, obtains the spectrum modulation signal X by each subcarrier-modulatediH(f-i×△B).Wherein XiCorresponding S mentioned abovei；
(4) (3) are formed by each spectrum modulation signal and carry out XiH (f-i × △ B) superposition, forms complex modulated signal
Frequency spectrum, spectrum modulation signal additive process may be expressed as:
(5) frequency spectrum for the complex modulated signal for generating (4) carries out discrete Fourier inverse transformation, ultimately forms the polyphony of time-domain
Signal processed, sending signal may be expressed as: Signal (t)TX=ifft (S (f))；
First via coding result and the second tunnel coding result are carried out orthogonal superposition, obtain overlapping multiplexing system by step S506
The coding of system exports result.
In above-mentioned steps, the coding result of each overlapping multiplexing encoder can be added, obtain overlapping multiplexing system
Coding result.
From the foregoing, it will be observed that signal to be encoded is interleaved processing by the above embodiments of the present application, it is defeated after obtaining interleaving treatment
Enter signal, the signal to be encoded after treating encoded signal and interleaving treatment respectively carries out overlapping multiplexing coding, obtains two-way coding
As a result, two-way coding result orthogonal superposition is obtained the coding output result of overlapping multiplexing system.Above scheme is by encoding
Interleaver is added in end, to realize the parallel cascade of two encoders, by the parallel cascade structure of two encoders, utilizes
Coding bound relationship can construct the communication system of parallel cascade, further be to improve using intersymbol coding bound relationship
System gain, solves the lower technical problem of the system gain of overlapping multiplexing system in the prior art, proposes system performance
It rises.
Optionally, according to the above embodiments of the present application, after obtaining the output result of overlapping multiplexing system, method is also wrapped
Include: step S508 is decoded output result, wherein is decoded to output result, comprising:
Step S5081, to after channel transmission first via coding result and the first prior information be decoded, obtain the
One decoding result, wherein the first prior information is obtained according to transmission information characteristics, transmission information characteristics according to signal to be encoded and
First overlapping multiplexing decoder determines.
Step S5083 is decoded the second tunnel coding result after the second prior information and channel transmission, obtains the
Two decoding results, wherein first decoding result of second prior information according to transmission information characteristics and after interweaving obtains, wherein
Coding output result after channel transmission is split to obtain the first via coding result after channel transmits and channel transmission
The second tunnel coding result afterwards.
Above-mentioned steps obtain transmission information characteristics, and transmission information characteristics export coding as the first prior information
As a result the signal of two channels is decoded in.It specifically can as shown in connection with fig. 3, using first via coding result as the volume of I channel
Code as a result, the second tunnel coding result be Q channel coding result for, first time decode when, pass through the first prior information
The first decoding result is obtained with the first via coding result after channel transmission, by the first decoding result and transmission letter after intertexture
Feature is ceased as the second tunnel coding result after the second prior information, with channel transmission in Q channel and carries out second of decoding, is obtained
To the second decoding result.
In above-mentioned steps, the second decoding result can be used as final decoding result, but due to only having carried out once repeatedly
The accuracy rate in generation, decoding is lower, therefore can continue iteration using the second decoding result as prior information.
Optionally, according to the above embodiments of the present application, after obtaining the second decoding result, the above method further include:
Step S5085, using the second decoding result and transmission information characteristics as the first prior information, after channel transmission
First via coding result and the first prior information be decoded, obtain the first decoding result.
Step S5087 is decoded the second tunnel coding result after the second prior information and channel transmission, obtains the
Two decoding results.
Above-mentioned steps using after deinterleaving the second decoding result and transmission feature information as the second prior information, and carry out
An iteration.
Optionally, according to the above embodiments of the present application, when the number of iterations reaches preset times, the second decoding result is determined
For the decoding result of signal to be encoded, wherein an iteration includes: to generate first decoding result and one second respectively
Decoding result.
Herein it should be noted that can constantly approach optimal performance after iterating, the number of iterations it is more more more
Close to optimal performance, but complexity and time delay are also higher.Therefore, it can need to use the faster algorithm of convergence rate and iteration
Mechanism reaches preferable performance with less the number of iterations.Common soft decoding method includes bcjr algorithm, MAP, Log-MAP
Algorithm etc..
From the foregoing, it will be observed that the application above scheme in decoding the Soft Inform ation that obtains a branch as another branch
Prior information, and the mutual iteration interactive information of two decoders is used, so that mistake final after successive ignition
Probability will be greatly reduced, and then improve decoding performance.
In an alternative embodiment, still by taking OvFDM as an example, the transmitting terminal of overlapping multiplexing system will be after coded modulation
Coding output result is launched by antenna, and signal is transmitted by wireless channel, and receiving end first carries out OvFDM for signal is received
Reception processing, since the signal received is time-domain signal, it is therefore desirable to Fourier transform first be carried out to time-domain signal and be converted to frequency
Domain signal, then signal is handled, including signal is sampled respectively, is decoded.Fourier inverse transformation and fourier in OvFDM
Transformation is directed to the setting of sampling number, and the sampling number of the two should be consistent, and value is 2n。
OvFDM receive process block diagram is as shown in Fig. 8, and OvFDM receive process processing step is as follows:
(1) sign synchronization is formed in time-domain to reception signal；
(2) digital processing is carried out to the signal in each symbol time section, including samples, quantifies, it is become to receive number
Word signal sequence；
(3) fourier-transform is carried out to form each time symbol to the reception digital signal sequences in each time symbol section
The practical receipt signal frequency spectrum in section.Its expression formula are as follows: Signal (f)RX=fft (s (t))；
(4) the practical receipt signal frequency spectrum in each time symbol section is divided in frequency domain with subcarrier spectrum interval delta B
Section obtains practical reception signal subsection frequency spectrum；
(5) spectrum waveform after cutting is decoded according to preset decoding algorithm.
Embodiment 3
According to embodiments of the present invention, a kind of embodiment of the signal processing apparatus of overlapping multiplexing system is provided, Fig. 9 is root
According to the schematic diagram of the signal processing apparatus of the overlapping multiplexing system of the embodiment of the present invention, as shown in figure 9, the device includes:
Interleaving treatment module 90, for signal to be encoded to be interleaved processing.
Coding module 92 encodes to obtain first via coding result, to intertexture for treating encoded signal progress overlapping multiplexing
Treated, and signal progress overlapping multiplexing to be encoded encodes to obtain the second tunnel coding result.
Addition module 94 is overlapped for first via coding result and the second tunnel coding result to be carried out orthogonal superposition
The coding of multiplex system exports result.
Embodiment 4
According to embodiments of the present invention, a kind of storage medium is provided, which is characterized in that storage medium includes the journey of storage
Sequence, wherein equipment where control storage medium executes the overlapping multiplexing system of any one of embodiment 1 in program operation
Signal processing method.
Embodiment 5
According to embodiments of the present invention, a kind of processor is provided, which is characterized in that processor is for running program, wherein
The signal processing method of the overlapping multiplexing system of any one of embodiment 1 is executed when program is run.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
In the above embodiment of the invention, it all emphasizes particularly on different fields to the description of each embodiment, does not have in some embodiment
The part of detailed description, reference can be made to the related descriptions of other embodiments.
In several embodiments provided herein, it should be understood that disclosed technology contents can pass through others
Mode is realized.Wherein, the apparatus embodiments described above are merely exemplary, such as the division of the unit, Ke Yiwei
A kind of logical function partition, there may be another division manner in actual implementation, for example, multiple units or components can combine or
Person is desirably integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed is mutual
Between coupling, direct-coupling or communication connection can be through some interfaces, the INDIRECT COUPLING or communication link of unit or module
It connects, can be electrical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
On unit.It can some or all of the units may be selected to achieve the purpose of the solution of this embodiment according to the actual needs.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can for personal computer, server or network equipment etc.) execute each embodiment the method for the present invention whole or
Part steps.And storage medium above-mentioned includes: that USB flash disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), mobile hard disk, magnetic or disk etc. be various to can store program code
Medium.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (14)
1. a kind of overlapping multiplexing system characterized by comprising
Coding side interleaver is interleaved processing for treating encoded signal；
First overlapping multiplexing encoder and the second overlapping multiplexing encoder, the input terminal of the second overlapping multiplexing encoder and institute
It states interleaver to be connected, wherein the first overlapping multiplexing encoder obtains first for encoding the signal to be encoded
Road coding result, the second overlapping multiplexing encoder obtain for encoding to the signal to be encoded after interleaving treatment
Two tunnel coding results；
Adder is connected with the output end of the first overlapping multiplexing encoder and the second overlapping multiplexing encoder respectively,
For carrying out orthogonal superposition to the first via coding result and second tunnel coding result, the overlapping multiplexing system is obtained
Coding export result.
2. system according to claim 1, which is characterized in that the first overlapping multiplexing encoder and second overlapping
Multiplexing and encoding device is two identical overlapping multiplexing encoders.
3. system according to claim 1, which is characterized in that the first overlapping multiplexing encoder and second overlapping
Multiplexing and encoding device passes through two different channels respectively and exports corresponding coding result.
4. system as claimed in any of claims 1 to 3, which is characterized in that the system also includes:
First overlapping multiplexing decoder and the second overlapping multiplexing decoder, wherein the output of the first overlapping multiplexing decoder
End by decode end interleaver be connected with the input terminal of the second overlapping multiplexing decoder, the second overlapping multiplexing decoder it is defeated
Outlet is connected by the first deinterleaver with the input terminal of the first overlapping multiplexing decoder；
The first overlapping multiplexing decoder be used for channel transmission after first via coding result and the first prior information into
Row decoding, obtains the first decoding result, wherein first prior information is according to transmission information characteristics and/or the deinterleaving
The second decoding result afterwards obtains, and the transmission information characteristics are determined according to the signal to be encoded；
The second overlapping multiplexing decoder is used for according to the second tunnel coding result after the second prior information and channel transmission,
Obtain second decoding result, wherein second prior information is according to after the transmission information characteristics and intertexture
First decoding result obtains；
Wherein, the coding output result after channel transmission is split to obtain the first via coding result after channel transmits and warp
The second tunnel coding result after transmission.
5. system according to claim 4, which is characterized in that the system also includes:
End interleaver is decoded, the output end and the second overlapping multiplexing decoder of the first overlapping multiplexing decoder are connected to
Input terminal, for being interleaved processing to first decoding result；
First deinterleaver is connected to the output end and the first overlapping multiplexing decoder of the second overlapping multiplexing decoder
Input terminal, for being deinterleaved processing to second decoding result.
6. system according to claim 4, which is characterized in that the system also includes:
Second deinterleaver is connected with the second overlapping multiplexing decoder, for carrying out solution friendship to second decoding result
Knit processing；
Decision device is connected with second deinterleaver, for treated that the second decoding result makes decisions according to deinterleaving,
Determine the decoding result of the overlapping multiplexing system.
7. system according to claim 3, which is characterized in that described two different channels are respectively I channel and Q letter
Road.
8. a kind of signal processing method of overlapping multiplexing system characterized by comprising
Signal to be encoded is interleaved processing；
It carries out overlapping multiplexing to the signal to be encoded to encode to obtain first via coding result, to the letter to be encoded after interleaving treatment
Number carry out overlapping multiplexing encode to obtain the second tunnel coding result；
The first via coding result and second tunnel coding result are subjected to orthogonal superposition, obtain the overlapping multiplexing system
Coding export result.
9. according to the method described in claim 8, it is characterized in that, the output result for obtaining the overlapping multiplexing system it
Afterwards, the method also includes: the output result is decoded, wherein the output result is decoded, comprising:
First via coding result and the first prior information after transmitting to channel are decoded, and obtain the first decoding result,
In, first prior information according to transmission information characteristics obtain, the transmission information characteristics according to the signal to be encoded with
Overlapping multiplexing decoder determines；
The second tunnel coding result after second prior information and channel transmission is decoded, the second decoding result is obtained,
In, first decoding result of second prior information according to the transmission information characteristics and after interweaving obtains；
Wherein, the coding output result after channel transmission is split to obtain the first via coding result after channel transmits and warp
The second tunnel coding result after transmission.
10. according to the method described in claim 9, it is characterized in that, after obtaining second decoding result, the method
Further include:
Using second decoding result and the transmission information characteristics as first prior information, after channel transmission
First via coding result and first prior information are decoded, and obtain first decoding result；
The second tunnel coding result after second prior information and channel transmission is decoded, second decoding is obtained
As a result.
11. according to the method described in claim 10, it is characterized in that, when the number of iterations reaches preset times, determine described in
Second decoding result is the decoding result of the signal to be encoded, wherein an iteration includes: to generate one described the respectively
One decoding result and second decoding result.
12. a kind of signal processing apparatus of overlapping multiplexing system characterized by comprising
Interleaving treatment module, for signal to be encoded to be interleaved processing；
Coding module encodes to obtain first via coding result, at intertexture for carrying out overlapping multiplexing to the signal to be encoded
Signal to be encoded after reason carries out overlapping multiplexing and encodes to obtain the second tunnel coding result；
Addition module obtains institute for the first via coding result and second tunnel coding result to be carried out orthogonal superposition
State the coding output result of overlapping multiplexing system.
13. a kind of storage medium, which is characterized in that the storage medium includes the program of storage, wherein run in described program
When control the storage medium where equipment perform claim require any one of 8 to 11 described in overlapping multiplexing system signal
Processing method.
14. a kind of processor, which is characterized in that the processor is for running program, wherein right of execution when described program is run
Benefit require any one of 8 to 11 described in overlapping multiplexing system signal processing method.
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