CN107026805A - Non-orthogonal multiple accesses the method for reseptance and device of Transmission system - Google Patents
Non-orthogonal multiple accesses the method for reseptance and device of Transmission system Download PDFInfo
- Publication number
- CN107026805A CN107026805A CN201610067731.7A CN201610067731A CN107026805A CN 107026805 A CN107026805 A CN 107026805A CN 201610067731 A CN201610067731 A CN 201610067731A CN 107026805 A CN107026805 A CN 107026805A
- Authority
- CN
- China
- Prior art keywords
- user
- decoding
- individual user
- signal
- individual
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03178—Arrangements involving sequence estimation techniques
- H04L25/03305—Joint sequence estimation and interference removal
-
- 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
- H04B1/7103—Interference-related aspects the interference being multiple access interference
- H04B1/7105—Joint detection techniques, e.g. linear detectors
-
- 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
- H04L1/0048—Decoding adapted to other signal detection operation in conjunction with detection of multiuser or interfering signals, e.g. iteration between CDMA or MIMO detector and FEC decoder
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses the method for reseptance and device that a kind of non-orthogonal multiple accesses Transmission system, wherein this method includes：Obtain the multi-user transmission information needed for the total reception signal and N number of user's demodulating and decoding of N number of user of multiple access access channel；Select the N in N number of user1Individual user, and by remaining N N1Individual user's receives signal as interference with to total N received in signal1Individual user carries out combined decoding, obtains N1The combined decoding result of individual user；According to N1The combined decoding result of individual user, recovers and subtracts the N being successfully decoded from total reception signal of N number of user1' individual user reception signal, and preserve remaining N N1' individual user total reception signal, N=N N are set1'；Combined decoding is repeated, until N1'=N or the execution number of times K of multi-stage combination decoding reach predetermined threshold value；Export the decoded result of the successful decoding user during K multi-stage combination decoding.This method can effectively reduce the complexity of multi-user reception, improve the performance of multi-user reception.
Description
Technical field
The method of reseptance of Transmission system is accessed the present invention relates to digital information transmission technical field, more particularly to a kind of non-orthogonal multiple
And device.
Background technology
In typical GSM, base station needs to be communicated with multiple users in coverage.Traditional multi-user
Multi-upstream access uses orthogonal multiple access technique, multiple users will be distributed to after channel width resource quadrature divide, so that each user
Between signal be mutually orthogonal.Orthogonal multiple access technique is realized simple, flexible.But, network information opinion is pointed out, is adopted
When being accessed with orthogonal multiple access, the theoretical circles in channel capacity domain are accessed (referred to as in the joint achievable rate domain upper bound of multi-user apart from multiple access
" theoretical circles ") there is larger gap.
Using non-orthogonal multiple access technology, the signal that different user is sent directly is superimposed in base station receiving terminal；Correspondingly, base station
Receiving terminal by SIC (Successive Interference Cancellation, serial interference elimination) or JD (JointDecoding,
Combined decoding) technology sequentially or simultaneously demodulating and decoding these superposition signal.Supercomposed coding and JD technologies are typically based at present
Non-orthogonal multiple access technology have：LDS-MA (Low Density Signature/Spreading-Multiple Access, it is dilute
Dredge the multiple access access of frequency expansion sequence), SCMA (Sparse Code Multiple Access, Sparse Code multiple access access), IDMA
(Interleave Division Multiple Access, the access of Interleaved partitioning scheme multiple access) and MU-BICMID (Multi-User
Bit-Interleaved-Coded-Modulation with Iterative Decoding, the bit-interleaved coded-modulation of iterative MUD is adjusted
System).Non-orthogonal multiple access technology, different user is distinguished with reference to the power resource of channel, so that same channel bandwidth resources
Signal between different user is overlapped.Select suitable non-orthogonal multiple access technology multi-user association can be made reachable
Rate domain upper bound approximation theory circle.In real system, due to the diversity of multiple subscriber signal transmission channels, non-orthogonal multiple connects
The diversity gain of multi-user transmission can further be excavated relative to orthogonal multiple access technique by entering technology.
IDMA is designed towards low signal-to-noise ratio and compared with the application scenarios of low rate.During using IDMA, different user passes through difference
Interleaving mode makes a distinction, therefore the number of users that can be accessed simultaneously is a lot.And IDMA approaches multiple access access channel capacity
The performance of the theoretical circles in domain.Although IDMA can significantly increase system while the number of users accessed, is constrained to connecing for simplification
Receipts machine algorithm, is only applicable to low signal-to-noise ratio region, and the transmission rate of each user is limited, each Subscriber Unit information bit
Operand it is very big.
LDS-MA and SCMA is by using different spread spectrum patterns or spreading code this differentiation different user.Two methods are connecing
Receiving end realizes that approximate maximum likelihood is more using Message Passing Algorithm (Message Passing Algorithm, MPA) algorithm
User detects.IDMA, LDS-MA and SCMA are that the combined coding multiple access technique of multiple access access channel (is based on
The multiple access technique of supercomposed coding and JD technologies).It is to be noted that：It is between some sparse spread spectrum pattern or spread spectrum code books
Mutually orthogonal, therefore when spreading pattern or spread spectrum code book negligible amounts, SCMA and LDS-MA scheme and performance connect
Nearly orthogonal multiple access access；And when spreading pattern or more spread spectrum code book quantity, the reception of SCMA and LDS-MA schemes is complicated
Degree is sharply increased, for example, due to the processing of spread spectrum, causing the subscriber signal superposition number of plies of each reception symbol to be multiplied.
Bit-interleaved coded-modulation multiple access access (Bit-Interleaved Coded Multiple Access, BICMA) is that a kind of multiple access connects
Enter the combined coding multiple access technique of channel, be Bit Interleaved Coded Modulation technology (Bit-Interleaved Coded
Modulation) in the application in multi-user's supercomposed coding field.MU-BICMID is the multi-purpose of BICMA multiple access techniques
Family coded modulation scheme.During using MU-BICMID, pass through the coded modulation scheme and transmit power of combined optimization different user
Actual transmissions performance is set to approach the theoretical circles in multiple access access channel capacity domain, and transmission plan is applied under multiple access access channel
The various application scenarios of high, medium and low spectrum efficiency.MU-BICMID basic thought is：Adjusted by the respective coding of user
Parameter and transmit power processed distinguish different user.MU-BICMID does not need spread processing, therefore same subscriber Signal averaging layer
Under several, user load rate is higher.
Above-mentioned non-orthogonal multiple access technology and scheme based on supercomposed coding and JD technologies can also make full use of multi-user transmission
The difference of channel improves transmission reliability there is provided multi-user diversity gain.User's superposition number of plies is more, multi-user and speed
Capacity gain is bigger, and multi-user diversity gain is higher.But, it is limited to user's transmission demand and receives complexity, existing scheme
Superposition number of users it is limited.
On the other hand, SIC receivers are usually used in receiving the supercomposed coding non-orthogonal multiple access Transmission system based on multi-layer coding.
SIC technologies need the signal of multiple users that demodulating and decoding is overlapped mutually successively, and eliminate demodulating and decoding subscriber signal pair successively
The interference of subsequent user signal, therefore the priority of different user signal is different.It is non-based on supercomposed coding and SIC technologies
Orthogonal multiple access technique and scheme eliminate the signal of each layer of user due to demodulating and decoding successively, and it is smaller to receive complexity, but
Multiple access can only be approached in once transmitting and accesses some points on channel capacity domain border, and there is asking for reception delay and error propagation
Topic.
There is probabilistic multiple access access Transmission system for channel, receiver is optimal using JD technologies, to based on connection
The supercomposed coding non-orthogonal multiple access Transmission system for compiling in collaboration with code and multi-layer coding is applicable.But when user's superposition number of plies is too high,
It is simple to be significantly improved using the Receiver Complexity of JD technologies.And the non-orthogonal multiple access system received using SIC technologies merely
, there is reception delay and error propagation in system, and transmission performance is remarkably decreased because of the uncertainty of channel.
Therefore there is the select permeability of JD receptions and SIC reception schemes in the receiver of non-orthogonal multiple access system, meanwhile,
There are problems that the compromise of decoding complex degree and decoding performance.
The content of the invention
The purpose of the present invention is intended at least solve one of above-mentioned technical problem to a certain extent.
Therefore, first purpose of the present invention is the method for reseptance for proposing that a kind of non-orthogonal multiple accesses Transmission system, this method
It is capable of the transmission information of the one or more users of every grade of demodulating and decoding and carries out interference elimination, can effectively reduces multi-user and connect
The complexity of receipts, improves the performance of multi-user reception, what the abundant multi-user's supercomposed coding for excavating multiple access access channel was brought
Capacity gain and diversity gain.
Second object of the present invention is the reception device for proposing that a kind of non-orthogonal multiple accesses Transmission system.
For up to above-mentioned purpose, first aspect present invention embodiment proposes the recipient that a kind of non-orthogonal multiple accesses Transmission system
Method, comprises the following steps：S1, obtains total reception signal of N number of user of multiple access access channel and N number of user
Multi-user transmission information needed for demodulating and decoding, and the execution number of times K=0 of multi-stage combination decoding is initialized, wherein, it is the multiple
Total reception signal of user is the signal for being superimposed interference and noise, and N is positive integer, and K is natural number；S2, selects institute
State the N in N number of user1Individual user, and by remaining N-N1The reception signal of individual user is as interference with total reception signal
The N1Individual user carries out combined decoding, obtains the N1The combined decoding result of individual user, and the multi-stage combination is set
The execution number of times K=K+1 of decoding, wherein, 0<N1≤N；S3, according to the N1The combined decoding result of individual user, from institute
Recover and subtract the N being successfully decoded in the total reception signal for stating N number of user1' individual user reception signal, and preserve remaining N-N1'
Total reception signal of individual user, sets N=N-N1', wherein, it is described be successfully decoded it is correct or decoded result is received including decoded result
Hold back；S4, repeats the step S2 and step S3, until N1'=N or the execution number of times of multi-stage combination decoding
K reaches predetermined threshold value；S5, exports the decoded result of the successful decoding user during K multi-stage combination decoding.
Non-orthogonal multiple according to embodiments of the present invention accesses the method for reseptance of Transmission system, obtains total reception letter of N number of user
Number and N number of user's demodulating and decoding need multi-user transmission information, by N-N1The reception signal of individual user is as interference with to total
Receive the N in signal1Individual user carries out combined coding and obtains N1The combined decoding result of individual user, according to combined decoding result just
True or convergence, recovers and subtracts the N being successfully decoded from total reception signal of N number of user1' individual user reception signal, and protect
Deposit remaining N-N1' individual user total reception signal, set N=N-N1'；Combined decoding is repeated, until N1'=N or multi-cascade
The execution number of times K for closing decoding reaches predetermined threshold value, exports the solution of the successful decoding user during K multi-stage combination decoding
Code result.This method is capable of the transmission information of the one or more users of every grade of demodulating and decoding and carries out interference elimination, Ke Yiyou
The complexity of effect reduction multi-user reception, improves the performance of multi-user reception, fully excavates the multi-user that multiple access accesses channel
Capacity gain and diversity gain that supercomposed coding is brought.
In one embodiment of the invention, the multi-user transmission information include the superposition number of user, each number of users it is believed that
Number channel condition information and each user data signal coded modulation scheme.
In one embodiment of the invention, the step S2, including：S21, according to the letter of each user data signal
Channel state information and coded modulation scheme select the N from N number of user1Individual user；S22, by the N-N1It is individual to use
The reception signal at family is as interference signal with to total N for receiving signal1Individual user carries out combined coding, obtains the N1
The combined decoding result of individual user, and the execution number of times K=K+1 of the multi-stage combination decoding is set.
In one embodiment of the invention, when N number of user transmission rate under the same conditions, the step S21
Including：N number of user is calculated according to the channel condition information of each user data signal each to assume to carry out single user
Channel capacity during transmission；N number of user is ranked up from big to small by the channel capacity, and selects the channel
The maximum preceding N of capacity1Individual user.
In one embodiment of the invention, when N number of user transmission rate under different conditions, the step S21
Including：According to the channel condition information and coded modulation scheme of each user data signal from N number of user it is any
Select the N1Individual user.
For up to above-mentioned purpose, second aspect of the present invention embodiment proposes a kind of reception dress of non-orthogonal multiple access Transmission system
Put, including：Acquisition module, for obtain multiple access access channel N number of user total reception signal and it is described it is N number of use
Multi-user transmission information needed for the demodulating and decoding of family, and the execution number of times K=0 of multi-stage combination decoding is initialized, wherein, it is described many
Total reception signal of individual user is the signal for being superimposed interference and noise, and N is positive integer, and K is natural number；Decoder module,
For selecting the N in N number of user1Individual user, and by remaining N-N1The reception signal of individual user is as interference with to institute
State total N received in signal1Individual user carries out the combined coding, obtains the N1The combined decoding result of individual user,
And the execution number of times K=K+1 of the multi-stage combination decoding is set, wherein, 0<N1≤N；Interference cancellation module, for according to institute
State N1The combined decoding result of individual user, recovers and subtracts the N being successfully decoded from total reception signal of N number of user1'
The reception signal of individual user, and preserve remaining N-N1' individual user total reception signal, set N=N-N1', wherein, it is described into
Work(decoding includes decoded result correctly or decoded result is restrained, and repeats the decoder module and interference cancellation module, until
N1'=N or the execution number of times K of multi-stage combination decoding reach predetermined threshold value；Output module is more at K times for exporting
The decoded result of successful decoding user during level combined decoding.
Non-orthogonal multiple according to embodiments of the present invention accesses the reception device of Transmission system, and acquisition module obtains N number of user's
Total to receive the multi-user transmission information that signal and N number of user's demodulating and decoding need, decoder module is by N-N1The reception letter of individual user
Number as interference to receive the N selected in signal to total1Individual user carries out combined decoding and obtains N1The combined decoding knot of individual user
Really, interference cancellation module correctly or restrains according to combined decoding result, recovers and subtracts from total reception signal of N number of user
The N being successfully decoded1' individual user reception signal, and preserve remaining N-N1' individual user total reception signal, set N=N-N1',
Combined decoding is repeated, until N1'=N or the execution number of times K of multi-stage combination decoding reach predetermined threshold value, output module output
The decoded result of successful decoding user during K multi-stage combination decoding.The device can every grade of demodulating and decoding one or
The transmission information of multiple users simultaneously carries out interference elimination, can effectively reduce the complexity of multi-user reception, improves multi-user
The performance of reception, fully excavates capacity gain and diversity gain that multi-user's supercomposed coding of multiple access access channel is brought.
In one embodiment of the invention, the multi-user transmission information includes:It is superimposed the number of user, each user data
The coded modulation scheme of the channel condition information of signal and each user data signal.
In one embodiment of the invention, the decoder module includes：Selecting unit, for according to each user data
The channel condition information and coded modulation scheme of signal select the N from N number of user1Individual user；Decoding unit, is used
In by the N-N1Individual user's receives signal as interference signal with to total N received in signal1Individual user is carried out
Combined decoding, obtains the N1The combined decoding result of individual user, and the execution number of times of the multi-stage combination decoding is set
K=K+1.
In one embodiment of the invention, when N number of user transmission rate under the same conditions, the selecting unit
Specifically for：N number of user is calculated according to the channel condition information of each user data signal each to assume to carry out list
Channel capacity when user is transmitted；N number of user is ranked up from big to small by the channel capacity, and selects described
The maximum preceding N of channel capacity1Individual user.
In one embodiment of the invention, when N number of user transmission rate under different conditions, the selecting unit
Specifically for：According to the channel condition information and coded modulation scheme of each user data signal from N number of user
Arbitrarily select the N1Individual user.
The additional aspect of the present invention and advantage will be set forth in part in the description, and partly will become bright from the following description
It is aobvious, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect of the present invention and advantage will be apparent from the following description of the accompanying drawings of embodiments and
It is readily appreciated that, wherein,
Fig. 1 is the flow chart for the method for reseptance that Transmission system is accessed according to the non-orthogonal multiple of one embodiment of the invention；
Fig. 2 is the flow chart of the combined coding process according to one embodiment of the invention；
Fig. 3 is the simulation result for the method for reseptance that Transmission system is accessed according to the non-orthogonal multiple of one specific embodiment of the present invention
Exemplary plot；
Fig. 4 is the emulation knot for the method for reseptance that Transmission system is accessed according to the non-orthogonal multiple of another specific embodiment of the invention
The exemplary plot of fruit；
Fig. 5 is the emulation knot for the method for reseptance that Transmission system is accessed according to the non-orthogonal multiple of another specific embodiment of the invention
The exemplary plot of fruit；
Fig. 6 is the structural representation for the reception device that Transmission system is accessed according to the non-orthogonal multiple of one embodiment of the invention.
Embodiment
Embodiments herein is described below in detail, the example of the embodiment is shown in the drawings, wherein it is identical from beginning to end or
Similar label represents same or similar element or the element with same or like function.Described below with reference to accompanying drawing
Embodiment is exemplary, it is intended to for explaining the application, and it is not intended that limitation to the application.
Convenient for subsequent descriptions, some nouns of the invention are briefly described as follows.
Base station：The control end and receiving terminal of multiple access access channel.
Channel：Unless otherwise specified, the present invention refers in particular to multiple access access channel.Multiple access access channel occupancy when, frequency, sky, code
The sign resources in domain are referred to as channel width resource, and multiple access accesses channel and is referred to as channel power in the power that base station receiving terminal receives signal
Resource.If receiving the superposition that signal is multiple subscriber signals, illustrate that channel power resource is shared by multiple users.
BTU Basic Transmission Unit：Refer in particular to for uplink multi-address access channel width resource base unit, BTU Basic Transmission Unit be by
RE (Resource Element, resource particle) composition RB (Resource block, resource block), can be time-domain symbol,
Subcarrier in frequency domain symbol, spatial domain symbol, code domain symbol, or time-frequency idle bit domain symbol any combination.
Below with reference to the accompanying drawings the non-orthogonal multiple for describing the embodiment of the present invention accesses the method for reseptance and device of Transmission system.
Fig. 1 is the flow chart for the method for reseptance that Transmission system is accessed according to the non-orthogonal multiple of one embodiment of the invention.
As shown in figure 1, the method for reseptance of non-orthogonal multiple access Transmission system may comprise steps of：
It is multi-purpose needed for S1, the total reception signal and N number of user's demodulating and decoding of N number of user of acquisition multiple access access channel
Information is transmitted at family, and initializes the execution number of times K=0 of multi-stage combination decoding, wherein, N is positive integer, and K is natural number.
It is appreciated that in an embodiment of the present invention, total reception signal of the plurality of user is the signal for being superimposed interference and noise.
It should be noted that for thering is the scheduling access of Dedicated Signaling Channel and the fixed of multi-user transmission condition determination to access, it is many
User's transmission information can be provided by the signaling and control module of base station；For directly transmission data-signal or have channel associated signalling with
Machine is accessed, and the pilot signal that multi-user transmission information can be accessed each user data signal of correspondence in channel by multiple access is demodulated
What decoding was obtained.
It should also be noted that, in an embodiment of the present invention, multi-user transmission information includes the number of superposition user, Mei Geyong
The coded modulation scheme of the channel condition information of user data signal and each user data signal.Wherein, coded modulation scheme includes
Channel coding, Bit Interleave, constellation mapping and constellation symbol spread spectrum pattern or spread spectrum code book.
More specifically, the data-signal of each user can be produced in the following manner in transmitting terminal：User profile bit passes through
Channel coding obtains coded-bit, and coded-bit obtains interleaving bits by Bit Interleave, and interleaving bits are obtained by constellation mapping
Constellation symbol, then obtains base band by spread processing and sends symbol.
S2, selects the N in N number of user1Individual user, and by N-N1Individual user receives signal as interference to believe total receive
N in number1Individual user carries out combined decoding, obtains N1The combined decoding result of individual user, and holding for multi-stage combination decoding is set
Places number K=K+1, wherein, 0<N1≤N。
In addition, N1Can be with identical during step S2 is performed each time, can also be different, that is to say, that N1Numerical value
It can change.
It should be noted that selecting N from N number of user every time1Individual user can be by the signaling of base station and controlling for control module.
Specifically, in one embodiment of the invention, as shown in Fig. 2 selecting the N in N number of user1Individual user, and
By N-N1Individual user's receives signal as interference with to total N received in signal1Individual user carries out combined decoding, obtains N1
The combined decoding result of individual user implements process, i.e. step S2 and can included：
S21, N is selected according to the channel condition information and coded modulation scheme of each user data signal from N number of user1It is individual
User.
In one embodiment of the invention, when N number of user transmission rate under the same conditions, step S21 can include：
Channel when N number of user each assumes to carry out single user transmission is calculated according to the channel condition information of each user data signal to hold
Amount；N number of user is ranked up from big to small by channel capacity, and selects the maximum preceding N of channel capacity1Individual user.
In another embodiment of the present invention, when N number of user transmission rate under different conditions, step S21 can be wrapped
Include：N is selected according to the channel condition information and coded modulation scheme of each user data signal are any from N number of user1It is individual to use
Family.
For example, if setting N1=1, then select any 1 user in N number of user；Or if N is set1=2, then
Select any 2 users in N number of user；The like, or if N is set1=N, then select all users to be used
Family combined decoding.More specifically, by the signaling of base station and controlling for control module, repeatedly held to same N number of user
During row step S2, incomplete same N is selected every time1Individual user.
S22, by N-N1Individual user's receives signal as interference signal with to total N received in signal1Individual user is combined
Decoding, obtains N1The combined decoding result of individual user, and the execution number of times K=K+1 for setting multi-stage combination to decode.
It should be noted that the N of selection1Individual user carries out combined decoding, works as N1When=1, refer to N1Individual user is carried out
Single user demodulating and decoding, work as N1>When 1, refer to N1The multi-user association demodulating and decoding that individual user is carried out.It may be said that single
User's demodulating and decoding and multi-user association demodulating and decoding are the concrete operations of combined decoding module.
As can be seen that whenever a combined decoding is carried out, can will perform number of times K and add 1, and subsequent step is continued executing with, i.e.,
Step S3.
S3, according to N1The combined decoding result of individual user, recovers and subtracts from total reception signal of N number of user to be successfully decoded
N1' individual user reception signal, and preserve remaining N-N1' individual user total reception signal, set N=N-N1'。
Wherein, in an embodiment of the present invention, this, which is successfully decoded, can be regarded as including that decoded result is correct or decoded result convergence.
Specifically, the N that can be obtained according to step S21The combined decoding result of individual user, from N1Selection decoding knot in individual user
Fruit is correct or the convergent N of decoded result1' individual user carries out receiving signaling protein14-3-3 and elimination.Wherein, N1'=0 represents not decode
As a result the correct or convergent user of decoded result, can now retain total reception signal of the N number of user stored before.
That is, can be according to N1The combined decoding result of individual user recovers N1' the individual respective reception signal of user, and connect from always
The N of recovery is subtracted in the collection of letters number1' individual user reception signal, be superimposed the N-N of interference and noise1' individual other users it is total
Receive signal and preserve, and N=N-N is set1', and repeat step S2 and step S3.
S4, judges N1' whether whether the execution number of times K decoded equal to N or multi-stage combination reaches predetermined threshold value.
Specifically, if N1' be equal to the execution number of times K that N or multi-stage combination decode and reach predetermined threshold value, then perform step
S5.It is appreciated that working as N1'=N, or multi-stage combination decoding execution number of times K when reaching predetermined threshold value, terminate multi-stage combination
Decoding, and continue executing with step S5.
If N1' it is not equal to the execution number of times K not up to predetermined threshold values of N or multi-stage combination decoding, then return to step S2.
S5, exports the decoded result of the successful decoding user during K multi-stage combination decoding.
That is, in each step S2 carrying out of output, decoded result is correct or decoding of the convergent user of decoded result
As a result, receiver decoding is terminated.
Non-orthogonal multiple according to embodiments of the present invention accesses the method for reseptance of Transmission system, obtains total reception letter of N number of user
Number and N number of user's demodulating and decoding need multi-user transmission information, by remaining N-N1The reception signal of individual user as interference with
The N selected in signal is received to total1Individual user carries out combined decoding and obtains N1The combined decoding result of individual user, is solved according to joint
Code result is correct or restrains, and recovers and subtract the N being successfully decoded from total reception signal of N number of user1' individual user reception letter
Number, and total reception signal of remaining users is preserved, N=N-N is set1', combined decoding is repeated, until N1'=N or multi-cascade
The execution number of times K for closing decoding reaches predetermined threshold value, exports the institute being successfully decoded during K multi-stage combination decoding useful
The combined decoding result at family.This method, which is capable of the transmission information of the one or more users of every grade of demodulating and decoding and carries out interference, to disappear
Remove, can effectively reduce the complexity of multi-user reception, improve the performance of multi-user reception, fully excavate multiple access access letter
Capacity gain and diversity gain that multi-user's supercomposed coding in road is brought.
It is appreciated that to there is a kind of probabilistic typical scene in general multiple access access channel can be：There is slow fading in channel,
And current channel condition information is unknown in user's transmitting terminal, user's transmitting terminal just knows that channel condition information average for a long time.
Channel is accessed in user's transmitting terminal unknown slow fading multiple access to channel condition information, the ergodic channels capacity domain of multi-user is 0,
Therefore, the transmission rate of user is given, outage probability is certainly existed, or, the thresholding of outage probability is given, in having accordingly
Disconnected channel capacity domain.
Therefore, the scene that carries out burst transfers of data is accessed under channel for slow fading multiple access, compared to multi-user association achievable rate,
More pay close attention to the achievable rate of unique user.According to network information opinion relevant knowledge, using multi-layer coding combination receiving terminal serial interference
During the technology of elimination, the unique user achievable rate domain of multiple access access channel single transmission is limited.Correspondingly, using JD (Joint
Coding, combined coding) combine receiving terminal combined decoding technology when, multiple access access channel single transmission unique user it is reachable
Rate domain is overlapping with theoretical achievable rate domain.
Actual non-orthogonal multiple access scheme is limited to specific multiple access technique (for example, some technologies combine sequence expansion
Frequently, compared to direct linear superposition, the achievable rate domain of multi-user association achievable rate domain and unique user is different), compile
Code modulation technique (including planisphere non-gaussian distribution, channel coding code length is limited, limited performance) and multiuser decoding technology
(for example, combined decoding and SIC decodings difference are larger, the iterative MUD number of times of combined decoding, multiuser detection algorithm,
Channel decoding algorithms and iterations etc.), it is difficult consistent to cause Performance Evaluation.
The combined coding of direct linear superposition combination transmitting terminal and the combined decoding technology of receiving terminal can approach multiple access access channel
Transmission limit, thus, it is supposed that multiple access access channel input signal be Gaussian Profile, using direct linear superposition combine send
The combined coding at end and the combined decoding technology of receiving terminal, and assume that coding and decoding is that preferably (that is, user's transmission rate falls
In achievable rate domain, then user profile transmission success, otherwise, and user profile bust this), multiple access access letter is obtained with this
Road is using the signal to noise ratio of non-orthogonal multiple access technology and the theoretical circles of outage probability.
The theoretical circles for the different configuration parameters of method of reseptance for accessing Transmission system based on non-orthogonal multiple of the present invention, illustrate that base station is received
Compromise of the end using method of reseptance of the present invention between complexity and performance.It will be exemplified in detail below.
For example, under independent identically distributed Rayleigh block decline multiple access access channel, base station is accessed using single antenna reception multiple access
The total reception signal of 6 users of the superposition of channel interference and noise.The signal of 6 users input multiple access access channels is
Gaussian Profile, it is assumed that preferable multi-user coding and decoding, therefore obtain accessing biography using non-orthogonal multiple of the present invention in the case
The method of reseptance of defeated system uses Outage probability of distributed antenna during 3 kinds of different configuration parameters.Concrete configuration parameter can be with as follows：
1st kind it may is that when first time performing step S2, set N1=6, directly all 6 users are combined
Decoding.
2nd kind can, when first time performing step S2, set N1=5, calculated according to step S21 channel condition information
The channel capacity of each user, selects channel capacity 5 users of highest, by remaining 1 user as interference, to this
5 users carry out combined decoding；When performing step S2 afterwards, N is set1No more than 5, i.e., every time to no more than 5 users
Carry out combined decoding.
3rd kind can, when first time performing step S2, set N1=4, calculated according to step S21 channel condition information
The channel capacity of each user, selects channel capacity 4 users of highest, by remaining 2 users as interference, to this
4 users carry out combined decoding；When performing step S2 afterwards, N is set1No more than 4, i.e., every time to no more than 4 users
Carry out combined decoding.
Specifically, the method for reseptance that Transmission system is accessed using non-orthogonal multiple of the present invention is specific using 3 kinds of different configuration parameters
Simulation result is as shown in Figure 3：
Wherein circle, square and diamond curve represent the 1st kind, the 2nd kind and the 3rd kind situation respectively, can from Fig. 3 simulation results
To find out, the Outage probability of distributed antenna of the 1st kind, the 2nd kind and the 3rd kind situation has deteriorated successively, but three's difference very little.But
1st kind of situation needs to carry out 6 users combined decoding, and the 2nd kind of situation only needs to carry out joint solution at most 5 users
Code, the 3rd kind of situation only needs to carry out at most 4 users combined decoding, and complexity declines a lot.It can be seen that from analysis
The method of reseptance of Transmission system is accessed using non-orthogonal multiple of the present invention, N is set1=4, directly owned compared to receiving terminal
User's combined decoding, Outage probability of distributed antenna is declined slightly, but receiving terminal complexity is remarkably decreased.
Further, MU-BICMID multiple access is used under Urban Macro (ITU-Uma) channel of ITU organizational norms
Actual performance of the system of access scheme based on the different configuration parameter of method of reseptance of the present invention, illustrate base station receiving terminal complexity with
Compromise between performance.It will be exemplified in detail below.
For example, under ITU-Uma channels, 4 users access base simultaneously using MU-BICMID multiple access schemes
Stand, the coded modulation scheme of 4 users is identical, transmission rate is 0.25bit/channel-use/user, base station uses single antenna
Receive.Other specific simulation parameters are as shown in table 1 below：
The simulation parameter of table 1
Base station accesses the method for reseptance of Transmission system using non-orthogonal multiple of the present invention, and multi-stage combination solution is carried out according to step S1-S5
Code, wherein actual parameter is as follows：, can be with arrange parameter N when carrying out step S21=3, and select before channel capacity maximum
N1Individual user carries out combined decoding；When carrying out step S3, according to the combined decoding result of 3 users in step S2, if
N1Decoded result is correct per family or decoded result is restrained for '≤3 use, then recovers and eliminate this N1' the individual respective reception letter of user
Number, return to step S2；Otherwise, step S4 is continued, until N1'=N or the execution number of times K of multi-stage combination decoding reach
Predetermined threshold value terminates receiver decoding.
Specifically, 4 users use MU-BICMID multiple access schemes while specific simulation result such as Fig. 4 of access base station
It is shown：Wherein diamond curve is that base station is joined based on the method for reseptance that non-orthogonal multiple of the present invention accesses Transmission system in above-mentioned configuration
Actual performance under several.Meanwhile, give two reference performances, square curve be 4 users according to above-mentioned simulated conditions and
MU-BICMID schemes, but receiving terminal directly uses the reference performance that combined decoding technology is obtained to 4 users；Circular curve
For 4 users be Gauss input when, using the combined coding and the combined decoding skill of receiving terminal of direct linear superposition combination transmitting terminal
Art, the theoretical performance limit in the case of preferable multi-user coding and decoding.
From simulation result as can be seen that 1 user first is considered as into interference, the interruption for carrying out combined decoding to wherein 3 users is general
Rate Performance Simulation Results, with being directly declined slightly to the simulation result that 4 users carry out combined decoding, but receiving terminal receives complicated
Degree is but compared and significantly reduced.
Again for example, under ITU-Uma channels, 4 users are accessed simultaneously using MU-BICMID multiple access schemes
Base station, allows 4 use to use the LDPC code of 1/4 code check per family, transmission rate is 0.50bit/channel-use/user, other
The simulation result that simulated conditions and parameter all same are obtained is as shown in Figure 5.
From simulation result as can be seen that 1 user first is considered as into interference, the interruption for carrying out combined decoding to wherein 3 users is general
Rate Performance Simulation Results, with directly having declined to the simulation result that 4 users carry out combined decoding, but receiving terminal receives complicated
Degree is but significantly reduced.
In summary, the method for reseptance of the non-orthogonal multiple access Transmission system of the embodiment of the present invention has the advantages that：
1) two kinds of multiple access techniques of combined coding and multi-layer coding and a variety of existing schemes of compatible multiple access access channel；
2) receiver can obtain compromise with flexible configuration parameter between complexity and transmission performance；
3) under conditions of multiple access access channel has uncertain or coded modulation scheme limited capacity, multilayer can be effectively improved
Encode the performance that multiple access accesses Transmission system；
4) Receiver Complexity that combined coding multiple access accesses Transmission system can be effectively reduced, superposition number of users is increased substantially.
Method of reseptance with the non-orthogonal multiple access Transmission system that above-mentioned several embodiments are provided is corresponding, and one kind of the invention is real
Apply example and the reception device that a kind of non-orthogonal multiple accesses Transmission system is also provided, due to non-orthogonal multiple provided in an embodiment of the present invention
Access the reception device of Transmission system and the non-orthogonal multiple of above-mentioned several embodiments offers accesses the method for reseptance phase of Transmission system
Correspondence, therefore the embodiment of the method for reseptance in foregoing non-orthogonal multiple access Transmission system is also applied for the present embodiment offer
Non-orthogonal multiple accesses the reception device of Transmission system, is not described in detail in the present embodiment.Fig. 6 is according to of the invention one
The structural representation of the reception device of the non-orthogonal multiple access Transmission system of embodiment.As shown in fig. 6, the non-orthogonal multiple connects
Entering the reception device of Transmission system can include:Acquisition module 10, decoder module 20, interference cancellation module 30 and output module
40。
Wherein, acquisition module 10 is used for the total reception signal and N number of user solution for obtaining N number of user of multiple access access channel
The multi-user transmission information needed for code is reconciled, and initializes the execution number of times K=0 of multi-stage combination decoding, wherein, multiple users'
Total signal that receives is the signal for being superimposed interference and noise, and N is positive integer, and K is natural number.
Decoder module 20 is used to select the N in N number of user1Individual user, and by remaining N-N1The reception signal conduct of individual user
Disturb with to total N received in signal1Individual user carries out combined decoding, obtains N1The combined decoding result of individual user, and set
The execution number of times K=K+1 of multi-stage combination decoding, wherein, 0<N1≤N。
Interference cancellation module 30 is used for according to N1The combined decoding result of individual user, it is extensive from total reception signal of N number of user
Redoubling subtracts the N being successfully decoded1' individual user reception signal, and preserve total reception signal of remaining users, N=N-N be set1',
Wherein, it is successfully decoded including decoded result is correct or decoded result convergence, and repeats perform decoding module and interference cancellation module,
Until N1'=N or the execution number of times K of multi-stage combination decoding reach predetermined threshold value.
Output module 40 is used for the decoded result for exporting the successful decoding user during K multi-stage combination decoding.
In one embodiment of the invention, multi-user transmission information includes：It is superimposed the number of user, each user data signal
Channel condition information and each user data signal coded modulation scheme.
In one embodiment of the invention, as shown in fig. 6, decoder module 20 includes：Selecting unit 21 and decoding unit
22.Wherein, selecting unit 21 is used for according to the channel condition information and coded modulation scheme of each user data signal from N number of
N is selected in user1Individual user.Decoding unit 22 is used for N-N1The reception signal of individual user is as interference signal with to always connecing
N in the collection of letters number1Individual user carries out combined coding, obtains N1The combined decoding result of individual user, and set multi-stage combination to decode
Execution number of times K=K+1.
Specifically, in one embodiment of the invention, when N number of user transmission rate under the same conditions, selection is single
Member 21 can be calculated when N number of user each assumes to carry out single user transmission according to the channel condition information of each user data signal
Channel capacity, and N number of user is ranked up from big to small by channel capacity, and select the maximum preceding N of channel capacity1It is individual to use
Family.
In another embodiment of the present invention, when N number of user transmission rate under different conditions, selecting unit 21 can root
N is selected according to the channel condition information and coded modulation scheme of each user data signal are any from N number of user1Individual user.
Non-orthogonal multiple according to embodiments of the present invention accesses the reception device of Transmission system, and acquisition module obtains N number of user's
Total to receive the multi-user transmission information that signal and N number of user's demodulating and decoding need, decoder module is by N-N1The reception letter of individual user
Number as interference to receive the N selected in signal to total1Individual user carries out combined decoding and obtains N1The combined decoding knot of individual user
Really, interference cancellation module correctly or restrains according to combined decoding result, recovers and subtracts from total reception signal of N number of user
The N being successfully decoded1' individual user reception signal, and preserve total reception signal of remaining users, N=N-N be set1', repeat to join
Decoding is closed, until N1'=N or the execution number of times K of multi-stage combination decoding reach predetermined threshold value, and output module is exported at K times
The combined decoding result for all users that multi-stage combination is successfully decoded during decoding.The device being capable of every grade of demodulating and decoding one
The transmission information of individual or multiple users simultaneously carries out interference elimination, can effectively reduce the complexity of multi-user reception, improves many
The performance that user receives, fully excavates capacity gain and diversity increasing that multi-user's supercomposed coding of multiple access access channel is brought
Benefit.
In the description of the invention, it is to be understood that term " first ", " second " are only used for describing purpose, and can not manage
Solve to indicate or imply relative importance or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ",
At least one this feature can be expressed or be implicitly included to the feature of " second ".
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specific example ",
Or the description of " some examples " etc. means to combine specific features, structure, material or the feature bag that the embodiment or example are described
It is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term necessarily pin
To be identical embodiment or example.Moreover, description specific features, structure, material or feature can any one or
Combined in an appropriate manner in multiple embodiments or example.In addition, in the case of not conflicting, those skilled in the art
Not be the same as Example or the feature of example and non-be the same as Example or example described in this specification can be combined and be combined.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment be it is exemplary,
It is not considered as limiting the invention, one of ordinary skill in the art can enter to above-described embodiment within the scope of the invention
Row change, modification, replacement and modification.
Claims (10)
1. a kind of non-orthogonal multiple accesses the method for reseptance of Transmission system, it is characterised in that comprise the following steps：
Needed for S1, the total reception signal and N number of user's demodulating and decoding of N number of user of acquisition multiple access access channel
Multi-user transmission information, and the execution number of times K=0 of multi-stage combination decoding is initialized, wherein, total reception letter of the multiple user
Number to be superimposed the signal of interference and noise, N is positive integer, and K is natural number；
S2, selects the N in N number of user1Individual user, and by remaining N-N1The reception signal of individual user as interference with
To total N received in signal1Individual user carries out combined decoding, obtains the N1The combined decoding result of individual user,
And the execution number of times K=K+1 of the multi-stage combination decoding is set, wherein, 0<N1≤N；
S3, according to the N1The combined decoding result of individual user, recovers and subtracts from total reception signal of N number of user
The N being successfully decoded1' individual user reception signal, and preserve remaining N-N1' individual user total reception signal, set N=N-N1',
Wherein, it is described to be successfully decoded including decoded result is correct or decoded result convergence；
S4, repeats the step S2 and step S3, until N1'=N or the execution number of times of multi-stage combination decoding
K reaches predetermined threshold value；
S5, exports the decoded result of the successful decoding user during K multi-stage combination decoding.
2. non-orthogonal multiple as claimed in claim 1 accesses the method for reseptance of Transmission system, it is characterised in that wherein, institute
Stating multi-user transmission information includes number, the channel condition information of each user data signal and each user of superposition user
The coded modulation scheme of data-signal.
3. non-orthogonal multiple as claimed in claim 2 accesses the method for reseptance of Transmission system, it is characterised in that the step
S2, including：
S21, is selected according to the channel condition information and coded modulation scheme of each user data signal from N number of user
Select the N1Individual user；
S22, by the N-N1Individual user's receives signal as interference with to total N for receiving signal1Individual user enters
Row combined decoding, obtains the N1The combined decoding result of individual user, and the execution number of times of the multi-stage combination decoding is set
K=K+1.
4. non-orthogonal multiple as claimed in claim 3 accesses the method for reseptance of Transmission system, it is characterised in that as the N
Under the same conditions, the step S21 includes the transmission rate of individual user：
N number of user is calculated according to the channel condition information of each user data signal each to assume to carry out single user biography
Channel capacity when defeated；
N number of user is ranked up from big to small by the channel capacity, and selects the maximum preceding N of the channel capacity1
Individual user.
5. non-orthogonal multiple as claimed in claim 3 accesses the method for reseptance of Transmission system, it is characterised in that as the N
Under different conditions, the step S21 includes the transmission rate of individual user：
Arbitrarily selected from N number of user according to the channel condition information and coded modulation scheme of each user data signal
Select the N1Individual user.
6. a kind of non-orthogonal multiple accesses the reception device of Transmission system, it is characterised in that including：
Acquisition module, total reception signal and N number of user demodulation for N number of user for obtaining multiple access access channel
Multi-user transmission information needed for decoding, and the execution number of times K=0 of multi-stage combination decoding is initialized, wherein, the multiple user
Total reception signal be the signal for being superimposed interference and noise, N is positive integer, and K is natural number；
Decoder module, for selecting the N in N number of user1Individual user, and by remaining N-N1The reception signal of individual user
As interference with to total N received in signal1Individual user carries out the combined decoding, obtains the N1Individual user's
Combined decoding result, and the execution number of times K=K+1 of the multi-stage combination decoding is set, wherein, 0<N1≤N；
Interference cancellation module, for according to the N1The combined decoding result of individual user, believes from total reception of N number of user
Recover and subtract the N being successfully decoded in number1' individual user reception signal, and preserve remaining N-N1' individual user total reception signal,
N=N-N is set1', wherein, it is described to be successfully decoded including decoded result is correct or decoded result convergence, and repeat the solution
Code module and interference cancellation module, until N1'=N or the execution number of times K of multi-stage combination decoding reach predetermined threshold value；
Output module, the decoded result for exporting the successful decoding user during K multi-stage combination decoding.
7. non-orthogonal multiple as claimed in claim 6 accesses the reception device of Transmission system, it is characterised in that wherein, institute
Stating multi-user transmission information includes:It is superimposed number, the channel condition information of each user data signal and each use of user
The coded modulation scheme of user data signal.
8. non-orthogonal multiple as claimed in claim 7 accesses the reception device of Transmission system, it is characterised in that the decoding
Module includes：
Selecting unit, for the channel condition information and coded modulation scheme according to each user data signal from the N
The N is selected in individual user1Individual user；
Decoding unit, for by the N-N1Individual user's receives signal as interference signal with total reception signal
The N1Individual user carries out combined decoding, obtains the N1The combined decoding result of individual user, and the multi-stage combination solution is set
The execution number of times K=K+1 of code.
9. non-orthogonal multiple as claimed in claim 8 accesses the reception device of Transmission system, it is characterised in that as the N
The transmission rate of individual user under the same conditions, the selecting unit specifically for：
N number of user is calculated according to the channel condition information of each user data signal each to assume to carry out single user biography
Channel capacity when defeated；
N number of user is ranked up from big to small by the channel capacity, and selects the maximum preceding N of the channel capacity1
Individual user.
10. non-orthogonal multiple as claimed in claim 8 accesses the reception device of Transmission system, it is characterised in that as the N
The transmission rate of individual user under different conditions, the selecting unit specifically for：
Arbitrarily selected from N number of user according to the channel condition information and coded modulation scheme of each user data signal
Select the N1Individual user.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610067731.7A CN107026805B (en) | 2016-01-29 | 2016-01-29 | The method of reseptance and device of non-orthogonal multiple access Transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610067731.7A CN107026805B (en) | 2016-01-29 | 2016-01-29 | The method of reseptance and device of non-orthogonal multiple access Transmission system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107026805A true CN107026805A (en) | 2017-08-08 |
| CN107026805B CN107026805B (en) | 2019-09-17 |
Family
ID=59524515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610067731.7A Active CN107026805B (en) | 2016-01-29 | 2016-01-29 | The method of reseptance and device of non-orthogonal multiple access Transmission system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107026805B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108134759A (en) * | 2017-12-25 | 2018-06-08 | 南京邮电大学 | A kind of non-orthogonal multiple cut-in method based on interference cancellation technology |
| CN110113136A (en) * | 2019-05-16 | 2019-08-09 | 南京邮电大学 | Low complex degree decoding algorithm in a kind of SCMA system |
| US10498558B1 (en) | 2018-05-11 | 2019-12-03 | Mitsubishi Electric Research Laboratories, Inc. | Symbol detection in shared wireless channel |
| CN114337923A (en) * | 2021-12-27 | 2022-04-12 | 同济大学 | Low-complexity packet decoding method and device based on successive interference cancellation |
| CN114337933A (en) * | 2022-03-16 | 2022-04-12 | 南昌大学 | High-speed visible light communication system based on SCMA and self-adaptive coding and decoding method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944942A (en) * | 2010-08-10 | 2011-01-12 | 北京邮电大学 | Multi-antenna transmission method and system for low-complexity adaptive transmission |
| WO2015025664A1 (en) * | 2013-08-19 | 2015-02-26 | 株式会社Ｎｔｔドコモ | Radio communication system and user equipment |
| CN104869094A (en) * | 2015-04-29 | 2015-08-26 | 清华大学 | Upstream multiple access method combined with orthogonal multiple access and nonorthogonal multiple access |
| CN105188151A (en) * | 2015-06-12 | 2015-12-23 | 北京邮电大学 | Non-orthogonal multi-address random access method, device and system |
-
2016
- 2016-01-29 CN CN201610067731.7A patent/CN107026805B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944942A (en) * | 2010-08-10 | 2011-01-12 | 北京邮电大学 | Multi-antenna transmission method and system for low-complexity adaptive transmission |
| WO2015025664A1 (en) * | 2013-08-19 | 2015-02-26 | 株式会社Ｎｔｔドコモ | Radio communication system and user equipment |
| CN104869094A (en) * | 2015-04-29 | 2015-08-26 | 清华大学 | Upstream multiple access method combined with orthogonal multiple access and nonorthogonal multiple access |
| CN105188151A (en) * | 2015-06-12 | 2015-12-23 | 北京邮电大学 | Non-orthogonal multi-address random access method, device and system |
Non-Patent Citations (1)
| Title |
|---|
| 刘俊: "基于交织迭代多源干扰消除的无线传输技术研究", 《中国优秀硕士学位论文》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108134759A (en) * | 2017-12-25 | 2018-06-08 | 南京邮电大学 | A kind of non-orthogonal multiple cut-in method based on interference cancellation technology |
| CN108134759B (en) * | 2017-12-25 | 2020-10-16 | 南京邮电大学 | Non-orthogonal multiple access method based on interference cancellation technology |
| US10498558B1 (en) | 2018-05-11 | 2019-12-03 | Mitsubishi Electric Research Laboratories, Inc. | Symbol detection in shared wireless channel |
| CN110113136A (en) * | 2019-05-16 | 2019-08-09 | 南京邮电大学 | Low complex degree decoding algorithm in a kind of SCMA system |
| CN114337923A (en) * | 2021-12-27 | 2022-04-12 | 同济大学 | Low-complexity packet decoding method and device based on successive interference cancellation |
| CN114337933A (en) * | 2022-03-16 | 2022-04-12 | 南昌大学 | High-speed visible light communication system based on SCMA and self-adaptive coding and decoding method |
| CN114337933B (en) * | 2022-03-16 | 2022-06-24 | 南昌大学 | High-speed visible light communication system based on SCMA and self-adaptive coding and decoding method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107026805B (en) | 2019-09-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107026805A (en) | Non-orthogonal multiple accesses the method for reseptance and device of Transmission system | |
| CN103493383B (en) | Based on the interference elimination of interfering link IL signal quality and method and device | |
| US6731668B2 (en) | Method and system for increased bandwidth efficiency in multiple input—multiple output channels | |
| KR101122906B1 (en) | Communication system, transmitting device, and receiving device | |
| CN1237729C (en) | CDMA system which uses pre-rotation before transmission | |
| KR20020004878A (en) | Code division multiple access wireless system with time reversed space time block transmitter diversity encoding | |
| US6795508B1 (en) | Method and apparatus for obtaining transmit diversity using switched antennas | |
| CN103209490B (en) | The resource allocation method of dedicated demodulation reference signal and relevant apparatus | |
| WO2016169414A1 (en) | Multiuser information processing method and apparatus | |
| WO2009067919A1 (en) | Data transmitting/receiving method and device in mimo system | |
| CN100452758C (en) | Preamble detection and data rate control in a UMTS system | |
| US6990139B2 (en) | System for, method of, transmitting data from a transmitter to a receiver and recovering the data at the receiver | |
| CN109802823A (en) | Multi output single input multicarrier correlation delay Keying scheme | |
| CN101483458B (en) | Information interactive combining method in collaboration multi-point receiving | |
| CN108880629A (en) | A kind of collaboration communication method based on Space Time Coding and physical-layer network coding | |
| Yang et al. | A residue number system based parallel communication scheme using orthogonal signaling. II. Multipath fading channels | |
| CN106301693B (en) | A kind of wireless signal modulation method based on codebook mapping | |
| Zheng et al. | Performance analysis of M-ary DCSK system over narrow band power-line communications | |
| CN106936751B (en) | Data transmission method and device | |
| Zhu et al. | DPI DCSK modulation with BCJR decoding | |
| US20090207890A1 (en) | Diversity transmitter-receiver in cdma system using space-time code, and method thereof | |
| CN106452540B (en) | A kind of method and apparatus for sending, receiving data | |
| CN110278041A (en) | Differential Chaos Shift Keying modulation-demo-demodulation method, device, system and readable storage medium storing program for executing | |
| D′ Amours et al. | Bit Error Rate Performance of a MIMO‐CDMA System Employing Parity‐Bit‐Selected Spreading in Frequency Nonselective Rayleigh Fading | |
| CN109005013A (en) | A kind of space-time coding method improving spectrum efficiency |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |