CN105634702B - Multi-user information co-channel sending, receiving method and its device - Google Patents
Multi-user information co-channel sending, receiving method and its device Download PDFInfo
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- CN105634702B CN105634702B CN201410719697.8A CN201410719697A CN105634702B CN 105634702 B CN105634702 B CN 105634702B CN 201410719697 A CN201410719697 A CN 201410719697A CN 105634702 B CN105634702 B CN 105634702B
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
Abstract
The invention discloses a kind of multi-user information co-channel sending, receiving method and its devices.Wherein, this method comprises: according to the modulation symbol of each user information in each group in the N number of user for being divided into K group, L superposition symbol is generated, wherein K, N, L are integer, and L >=K >=1, N >=2, L ≠ 1；The different sequences in orthogonal sequence for the use of L length being L carry out spread spectrum extension to L superposition symbol respectively, obtain L symbol sebolic addressing；Merge L symbol sebolic addressing, obtains merging symbol sebolic addressing；Send the transmitting signal formed by merging symbol sebolic addressing.Through the invention, when solving the transmission of NOMA downlink, under practical fading channel, terminal is symbol level SIC when demodulating and has very big error propagation risk, the problem of decline so as to cause access performance, to improve access performance.
Description
Technical field
The present invention relates to the communications fields, in particular to a kind of multi-user information co-channel sending, receiving method and its dress
It sets.
Background technique
Multi-user information transmission can be divided into orthogonal multiple access by access way and access (Orthogonal Multiple
Access, OMA) and non-orthogonal multiple access (Non-Orthogonal Multiple Access, NOMA).In OMA mode
Each user is not interfered with each other between user information each when transmitting, thus demodulating using stringent mutually orthogonal " subchannel ".
Relatively, the information of each user is transmitted on " entire channel " in NOMA mode, thus when demodulation between each user information
It interferes with each other.Multi-user information transmission has two kinds of situations of downlink transmission and uplink transmission.Downlink is also known as wide
It broadcasts, refer to transmitter for information while issuing multiple receivers.Related works shows that NOMA broadcast can be obtained than OMA broadcast more
Big power system capacity, as shown in Figure 1, particularly, NOMA mode can more preferably improve Cell Edge User (edge customer relatively in
Heart user is weaker user) capacity, while substantially keep central user (central user opposite edges user is stronger user)
Considerable volume.
To improve power system capacity, the capacity of edge customer is especially improved, downlink can choose non-orthogonal access way.
After nonopiate multi-user information co-channel broadcast refers to that transmitter stacks up the modulation symbol of different user information, identical
Send multiple receivers on running time-frequency resource to, different user extracts the information of oneself from the composite signal received.It is wherein more
The process that the modulation symbol of a user information stacks up is also known as " supercomposed coding ".Each user's letter when being demodulated due to NOMA mode
It is interfered with each other between breath, usual receiving end will be serial interference elimination (Successive Interference
Cancellation, SIC) separation information.It is briefly described by taking the SIC process of two users as an example below, the SIC process of multi-user is very
It is easy thus to promote: first going out the information of user 1 (weaker user) with the interference demodulation coding of user 2 (stronger user).Then
When demodulating 2 information of user, subtracted after needing first 1 signal reconstruct of user that demodulation coding before is come out, then solve 2 information of user.
Because not interfering with, performance can have a distinct increment 2 information of user in this way.Usual user 1 is edge customer, and user 2 is
Central user.
Classical documents using non-orthogonal multiple multiplexing it was demonstrated that combine code block grade SIC technology to can achieve multi-user information
Capacity limitation.But since code block grade SIC can cause very high implementation complexity, power consumption and time delay, these for terminal sometimes
It is unacceptable, so there is an urgent need to simple symbol level SIC (not have to 1 symbol of reconstructing user, realize simple but performance for terminal
Damage), if it is awgn channel, terminal is symbol level SIC when demodulating can also guarantee performance substantially, but in practical fading channel
Under, when the signal after supercomposed coding synthesis is in deep and declines on frequency band, these composite signals after too deep decline are symbol level SIC
Very big error propagation risk is had, so as to cause access performance decline.
Summary of the invention
The present invention provides a kind of multi-user's co-channel, when being sent at least solving NOMA downlink, under practical fading channel,
Terminal is symbol level SIC when demodulating and has very big error propagation risk, declines this problem so as to cause access performance.
According to an aspect of the invention, there is provided a kind of multi-user information co-channel sending method, comprising: according to being divided into
The modulation symbol of each user information in each group in N number of user of K group generates L superposition symbol, wherein K, N, L are whole
Number, and L >=K >=1, N >=2, L ≠ 1；The different sequences in orthogonal sequence for the use of L length being L are respectively to the L superpositions
Symbol carries out spread spectrum extension, obtains L symbol sebolic addressing；Merge the L symbol sebolic addressing, obtains merging symbol sebolic addressing；Send by
The transmitting signal for merging symbol sebolic addressing and being formed.
Preferably, according to the modulation symbol of each user information in each group in the N number of user for being divided into K group, L are generated
The superposition symbol includes: to determine that the modulation symbol of each user information in user group is superimposed L moment in the case where K=1
L obtained symbol is the superposition symbol；In the case where K >=2, the modulation symbol of each user information in K user group is determined
Number L symbol being superimposed a moment is the superposition symbol, wherein L=K.
Preferably, in the case where K >=2, determine that the modulation symbol of each user information in K user group is folded a moment
The L symbol added is that the superposition symbol includes: the number of users M in kth user groupkIn the case where=1, described in determination
The modulation symbol of single user information in kth user group is superposition symbol of the group a moment；Use in kth user group
Amount MkIn the case where >=2, determine that the superimposed symbol of modulation symbol of the multi-user information in the kth user group is the group
In the superposition symbol at a moment；Wherein, k=1,2 ..., K.
Preferably, the number of users M for being divided into kth user group in N number of user of K groupkIt is 1 or 2 or 3；Wherein,
K=1,2 ..., K.
Preferably, in MkIn the case where >=2, the channel where each user in kth user group is differentiation.
Preferably, the planisphere of all possible constellation point compositions of the superposition symbol is gray mappings.
Preferably, the number of users M in kth user groupkIn the case where >=2, the multi-user in the kth user group is determined
The superimposed symbol of the modulation symbol of information is the mode that superposition symbol of the group a moment includes following one: to kth
M in user groupkThe modulation symbol of a user information is directly superimposed；To M in kth user groupkThe modulation symbol of a user information
It is superimposed after optimizing.
Preferably, to M in kth user groupkSuperposition includes: to answer second after the modulation symbol of a user information optimizes
Numerical symbol carries out mirror image processing, the symbol after obtaining mirror image, wherein second complex symbol is MkOne in a modulation symbol
It is a, or be MkTwo superimposed symbols of symbol in the modulation symbol of a user information；By the first complex symbol with it is described
Symbol after mirror image is added, and obtains the superposition symbol, wherein first complex symbol is MkThe modulation of a user information accords with
One in number.
It preferably, is x in first complex symbol1+y1I, the second complex symbol are x2+yzIn the case where i, institute
Superposition symbol is stated to be one of the following:
Or Wherein,Or For the symbol after the mirror image, Xstd+YstdI is corresponding with first complex symbol not normalized
Integer lattice constellation symbol Sstd,It indicates to be rounded downwards,Expression rounds up.
Preferably, the corresponding X of BPSKstdValue is { 1, -1 }, YstdTake zero；The corresponding X of QPSKstd、YstdValue be 1 ,-
1}；The corresponding X of 16QAMstd、YstdValue is { 1, -1,3, -3 }；The corresponding X of 64QAMstd、YstdValue be 1, -1,3, -3,5, -
5,7, -7 }.
Preferably, according to be divided into K group N number of user in each group in each user information modulation symbol, generation L
Before a superposition symbol, the method also includes: to M in kth user groupkA user information carries out Constellation optimization modulation, obtains
The modulation symbol of each user information in kth user group, wherein k=1,2 ..., K.
Preferably, to M in kth user groupkIt includes: 60 degree of apex angle Diamond constellations that a user information, which carries out Constellation optimization modulation,
The modulation perhaps modulation of triangle constellation or the modulation of rectangle constellation.
Preferably, the modulation symbol of each user information is to give unit power modulation symbol distribution power P in kth user groupm
Symbol afterwards, wherein PmIt is represented to the power of the symbol distribution of user m in kth group；M=1,2 ..., Mk；P1+P2+…+PMk=
P；P is the general power for sending the transmitter for emitting signal and distributing to kth group user.
Preferably, the symbol sebolic addressing after the L extension is scattered in running time-frequency resource.
Preferably, sending by the transmitting signal that the merging symbol sebolic addressing is formed includes: by the merging symbol sequence
Column form L transmitting signal, and send the transmitting signal respectively by L antenna.
According to another aspect of the present invention, a kind of multi-user information co-channel method of reseptance is additionally provided, comprising: receive hair
The transmitting signal of machine transmission is penetrated, wherein the transmitting signal is: respectively according to the N number of use for being divided into K group on the transmitter
The modulation symbol of each user information in each group in family generates L superposition symbol, wherein and K, N, L are integer, and L >=K >=
1, N >=2, L ≠ 1；The different sequences in orthogonal sequence for the use of L length being L respectively spread the L superposition symbols
Extension, obtains L symbol sebolic addressing；Merge the L symbol sebolic addressing, obtains merging symbol sebolic addressing, and by the merging symbol
The transmitting signal that sequence is formed；After carrying out channel equalization, after de-spreading the merging using frequency expansion sequence corresponding with transmitting terminal
Symbol sebolic addressing；The superposition symbol obtained after despreading is demodulated, the corresponding user information of the user is obtained.
Preferably, the corresponding frequency expansion sequence of user group where the user and transmitter carry out spread spectrum extension institute to the user group
The frequency expansion sequence used is identical.
Preferably, the superposition symbol obtained after despreading is demodulated, obtains the corresponding user information of the user
Mode including following one: it is directly demodulated with the interference of other users；Or first with other users interference solve compared with
The symbol of weak user, then isolated with symbol level SIC receive in signal described in weaker user symbol, remove the weaker use
Mirror image processing is done again after the symbol at family, until solving the user information of the user.
According to another aspect of the present invention, a kind of multi-user information co-channel sending device is additionally provided, comprising: superposition mould
Block, for generating L superposition symbol according to the modulation symbol for being divided into each user information in each group in N number of user of K group
Number, wherein K, N, L are integer, and L >=K >=1, N >=2, L ≠ 1；Spread spectrum module is the orthogonal sequence of L for using L length
In different sequences spread spectrum extension is carried out to L superposition symbols respectively, obtain L symbol sebolic addressing；Merging module, for closing
And the L symbol sebolic addressing, it obtains merging symbol sebolic addressing；Sending module merges what symbol sebolic addressing was formed by described for sending
Emit signal.
Preferably, the laminating module is used for: in the case where K=1, determining the modulation symbol of each user information in user group
Number L symbol being superimposed L moment is the superposition symbol；In the case where K >=2, determines and respectively used in K user group
The modulation symbol of family information is the superposition symbol in the L symbol that a moment is superimposed, wherein L=K.
Preferably, the laminating module is also used to: the number of users M in K >=2, and in kth user groupk=1 the case where
Under, determine that the modulation symbol of the single user information in the kth user group is superposition symbol of the group a moment；K >=
2, and the number of users M in kth user groupkIn the case where >=2, the modulation of the multi-user information in the kth user group is determined
The superimposed symbol of symbol is superposition symbol of the group a moment；Wherein, k=1,2 ..., K.
Preferably, the laminating module is also used to: to M in kth user groupkThe modulation symbol of a user information carries out direct
Supercomposed coding；Or to M in kth user groupkThe modulation symbol of a user information optimizes rear supercomposed coding.
Preferably, the laminating module is also used to: the second complex symbol being carried out mirror image processing, the symbol after obtaining mirror image
Number, wherein second complex symbol is MkOne in a modulation symbol, or be MkIn the modulation symbol of a user information
Two superimposed symbols of symbol；First complex symbol is added with the symbol after the mirror image, obtains the superposition symbol,
Wherein, first complex symbol is MkOne in the modulation symbol of a user information.
Preferably, described device further include: modulation module, for M in kth user groupkA user information carries out constellation
Optimization modulation, obtains the modulation symbol of each user information in kth user group, wherein k=1,2 ..., K.
Preferably, the modulation module is also used to: carrying out 60 degree of apex angle Diamond constellation modulation or triangle to user information
The modulation of shape constellation or the modulation of rectangle constellation.
Preferably, the symbol sebolic addressing after the L extension is scattered in running time-frequency resource.
Preferably, the sending module is also used to: the merging symbol sebolic addressing being formed L transmitting signal, and passes through L
Antenna sends the transmitting signal respectively.
According to another aspect of the present invention, a kind of multi-user information co-channel reception device is additionally provided, comprising: receive mould
Block, for the transmitting signal that receiver/transmitter is sent, wherein the transmitting signal is: respectively according to being divided on the transmitter
At the modulation symbol of each user information in each group in N number of user of K group, L superposition symbol is generated, wherein K, N, L are whole
Number, and L >=K >=1, N >=2, L ≠ 1；The different sequences in orthogonal sequence for the use of L length being L are respectively to the L superpositions
Symbol carries out spread spectrum extension, obtains L symbol sebolic addressing；Merge the L symbol sebolic addressing, obtains merging symbol sebolic addressing, and by
The transmitting signal for merging symbol sebolic addressing and being formed；Module is de-spread, after carrying out channel equalization, using corresponding with transmitting terminal
Frequency expansion sequence de-spreads the symbol sebolic addressing after the merging；Demodulation module, for being carried out to the superposition symbol obtained after despreading
Demodulation, obtains the corresponding user information of the user.
Preferably, the corresponding frequency expansion sequence of user group where the user and transmitter carry out spread spectrum extension institute to the user group
The frequency expansion sequence used is identical.
Preferably, the demodulation module is used for: directly being demodulated with the interference of other users；Or first with other users
Interference solve the symbol of weaker user, then isolated with symbol level SIC receive in signal described in weaker user symbol,
Mirror image processing is done again after removing the symbol of the weaker user, until solving the user information of the user.
Through the invention, it is accorded with using according to the modulation for being divided into each user information in each group in N number of user of K group
Number, generate L superposition symbol, wherein K, N, L are integer, and L >=K >=1, N >=2, L ≠ 1；It the use of L length is the orthogonal of L
Different sequences in sequence carry out spread spectrum extension to L superposition symbol respectively, obtain L symbol sebolic addressing；Merge L symbol sequence
Column obtain merging symbol sebolic addressing；The mode for sending the transmitting signal formed by merging symbol sebolic addressing, solves the transmission of NOMA downlink
When, under practical fading channel, terminal is symbol level SIC when demodulating and has very big error propagation risk, so as to cause access
The problem of performance declines, to improve access performance.
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 capacity comparison figure of the NOMA mode and OMA mode according to the relevant technologies；
Fig. 2 is the flow diagram of multi-user information co-channel sending method according to an embodiment of the present invention；
Fig. 3 is the flow diagram of multi-user information co-channel method of reseptance according to an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of multi-user information co-channel sending device according to an embodiment of the present invention；
Fig. 5 is the preferred structure schematic diagram of multi-user information co-channel sending device according to an embodiment of the present invention；
Fig. 6 is the structural schematic diagram of multi-user information co-channel reception device according to an embodiment of the present invention；
Fig. 7 is wireless broadcast communication system schematic according to the preferred embodiment of the invention；
Fig. 8 is the schematic diagram according to the preferred embodiment of the invention that N number of user is divided into K group；
Fig. 9 is that multi-user information co-channel broadcast system according to the preferred embodiment of the invention shows in the treatment process of transmitting terminal
It is intended to；
Figure 10 be according to the preferred embodiment of the invention single 8 it is long merge symbol sebolic addressings and be scattered in running time-frequency resource show
It is intended to；
Figure 11 is treatment process schematic diagram of the multi-user's modulation symbol according to the preferred embodiment of the invention in base station；
Figure 12 is that user's modulation symbol generates schematic diagram in one group in preferred embodiment one according to the present invention；
Figure 13 is the schematic diagram that two QPSK symbols are directly superimposed in one group in preferred embodiment one according to the present invention；
Figure 14 is the schematic diagram being superimposed after two QPSK symbols optimizations in preferred embodiment one in one group according to the present invention；
Figure 15 is that a frequency expansion sequence is superimposed by one group of user's modulation symbol in preferred embodiment one according to the present invention
Sign extended schematic diagram；
Figure 16 is the schematic diagram that 8 groups of merging symbol sebolic addressings are sent by 8 antennas in preferred embodiment one according to the present invention；
Figure 17 is the exemplary receiver structure of the multi-user information co-channel broadcast system of preferred embodiment two according to the present invention
Schematic diagram.
Specific embodiment
In the multi-user information co-channel sending method of NOMA downlink broadcast system provided in an embodiment of the present invention, transmitter will
After multiple user groupings, multi-user is directly superimposed by non-orthogonal manner in group or optimization stack, difference organize superimposed symbols
Using in orthogonal sequence set different sequences carry out sign extended, it is all extended after symbol sebolic addressing merge after be sent to end
End demodulates the information of oneself after terminal equilibrium despreading.Using the following example of the present invention, terminal despreading after every group it is superimposed
The case where signal-to-noise ratio (SNR) of symbol can be close to additive white Gaussian noise (AWGN), i.e., the maximum journey under downlink fading channel
Degree guarantees multiple access performance.
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and in combination with Examples.It should be noted that not conflicting
In the case of, the features in the embodiments and the embodiments of the present application can be combined with each other.Also, it is shown in the flowchart of the accompanying drawings
Step can execute in a computer system such as a set of computer executable instructions, although also, showing in flow charts
Logical order, but in some cases, it can with the steps shown or described are performed in an order that is different from the one herein.
A kind of co-channel sending method of multi-user information is present embodiments provided, Fig. 2 is according to an embodiment of the present invention more
The flow chart of the co-channel sending method of user information, as shown in Fig. 2, the process includes the following steps:
Step S202 generates L according to the modulation symbol of each user information in each group in the N number of user for being divided into K group
A superposition symbol, wherein K, N, L are integer, and L >=K >=1, N >=2, L ≠ 1；
The different sequences in orthogonal sequence that step S204 is L using L length respectively expand L superposition symbol
Frequency extends, and obtains L symbol sebolic addressing；
Step S206 merges L symbol sebolic addressing, obtains merging symbol sebolic addressing；
Step S208 sends the transmitting signal formed by merging symbol sebolic addressing.
Through the above steps, it by way of being overlapped to modulation symbol and merging after spreading, solves under NOMA
When row is sent, under practical fading channel, terminal is symbol level SIC when demodulating and has very big error propagation risk, to lead
The problem of causing access performance decline, improves access performance.
Preferably, same user according to it is different at the time of, the modulation symbol of multiple user informations can be generated；Similar, K
The modulation symbol of L user information can be generated in different moments by a user.So, in step S202, according to being divided into K group
N number of user in each group in each user information modulation symbol, generate L superposition symbol can use following manner: in K
In the case where=1, determine the L symbol that the modulation symbol of each user information in user group is superimposed L moment for superposition
Symbol.In the case where K >=2, the L that the modulation symbol of each user information in K user group is superimposed a moment is determined
A symbol is superposition symbol, wherein L=K.
In the case where above-mentioned K >=2, determine that the modulation symbol of each user information in K user group is superimposed a moment
When L obtained symbol is superposition symbol, superposition symbol can be generated according to the different of user's number in user group.For example,
Number of users M in kth user groupkIn the case where=1, determine that the modulation symbol of the single user information in kth user group is the group
In the superposition symbol at a moment；Number of users M in kth user groupkIn the case where >=2, determine multi-purpose in kth user group
The superimposed symbol of the modulation symbol of family information is superposition symbol of the group a moment；Wherein, k=1,2 ..., K.
Preferably, it is divided into the number of users M of kth user group in N number of user of K groupkIt is 1 or 2 or 3；Wherein, k=
1,2 ..., K.
Preferably, in MkIn the case where >=2, the channel where each user in kth user group is differentiation.
Preferably, the planisphere for being superimposed all possible constellation point compositions of symbol is gray mappings.
Preferably, be overlapped coding mode can there are many, including but not limited to direct supercomposed coding or exchange
Symbol processed optimize after coding.Preferably, the number of users M in step S202, in kth user groupk>=2 the case where
Under, determine that the superimposed symbol of the modulation symbol of the multi-user information in kth user group is superposition symbol of the group a moment
Number include following one mode: to M in kth user groupkThe modulation symbol of a user information carries out direct supercomposed coding；Or
Person, to M in kth user groupkThe modulation symbol of a user information optimizes rear supercomposed coding.
Preferably, in step S202, to M in kth user groupkThe modulation symbol of a user information carries out directly superposition and compiles
Code includes: by the M as the modulation symbol of each user information in kth user groupkA complex symbol is directly added, to obtain kth
The superposition symbol of user group.
Preferably, in step S202, to M in kth user groupkThe modulation symbol of a user information is superimposed after optimizing
Coding includes: that the second complex symbol is carried out mirror image processing, the symbol after obtaining mirror image, wherein the second complex symbol is MkIt is a
One in modulation symbol, or be MkTwo superimposed symbols of symbol in the modulation symbol of a user information；By first
Complex symbol is added with the symbol after mirror image, obtains superposition symbol, wherein the first complex symbol is MkThe modulation of a user information
One in symbol.
It preferably, is superposition symbol in the case that the second complex symbol of x1+y1i is x2+y2i in the first complex symbol
It number is one of the following:
Or
Wherein,OrFor mirror image
Symbol afterwards, Xstd+YstdI is not normalized integer lattice constellation symbol S corresponding with the first complex symbolstd,It indicates
It is rounded downwards,Expression rounds up.
Preferably, the corresponding X of BPSKstdValue is { 1, -1 }, YstdTake zero；The corresponding X of QPSKstd、YstdValue be 1 ,-
1}；The corresponding X of 16QAMstd、YstdValue is { 1, -1,3, -3 }；The corresponding X of 64QAMstd、YstdValue be 1, -1,3, -3,5, -
5,7, -7 }.
Preferably, before step S202, when being modulated to user information, Different Modulations, example can be used
Such as, to M in kth user groupkA user information carries out Constellation optimization modulation, obtains the modulation of each user information in kth user group
Symbol, wherein k=1,2 ..., K.Wherein, to M in kth user groupkIt includes: 60 degree that a user information, which carries out Constellation optimization modulation,
The apex angle Diamond constellation modulation perhaps modulation of triangle constellation or the modulation of rectangle constellation.
Preferably, the modulation symbol of each user information is to give unit power modulation symbol distribution power P in kth user groupm
Symbol afterwards, wherein PmIt is represented to the power of the symbol distribution of user m in kth group；M=1,2 ..., Mk；P1+P2+…+PMk=
P；P is that the transmitter of transmission transmitting signal distributes to the general power of kth group user.
Preferably, the symbol sebolic addressing after L extension is scattered in running time-frequency resource.
Preferably, in step S208, symbol sebolic addressing will be merged and form L transmitting signal, and sent out respectively by L antenna
Send transmitting signal.
The embodiment of the invention also provides a kind of multi-user information co-channel method of reseptance, Fig. 3 is according to embodiments of the present invention
Multi-user information co-channel method of reseptance flow diagram, as shown in figure 3, the process includes the following steps:
Step S302, the transmitting signal that receiver/transmitter is sent, wherein transmitting signal is: on the transmitter respectively according to quilt
It is divided into the modulation symbol of each user information in each group in N number of user of K group, generates L superposition symbol, wherein K, N, L are
Integer, and L >=K >=1, N >=2, L ≠ 1；The different sequences in orthogonal sequence for the use of L length being L respectively accord with L superposition
Number spread spectrum extension is carried out, obtains L symbol sebolic addressing；L combined symbol sebolic addressing is obtained merging symbol sebolic addressing, and is accorded with by merging
The transmitting signal that number sequence is formed；
Step S304, the symbol sequence after carrying out channel equalization, after being merged using frequency expansion sequence corresponding with transmitting terminal despreading
Column；
Step S306 demodulates the superposition symbol obtained after despreading, obtains the corresponding user information of the user.
Preferably, the corresponding frequency expansion sequence of user group where the user and transmitter carry out spread spectrum extension institute to the user group
The frequency expansion sequence used is identical.
Preferably, in step S306, the superposition symbol obtained after despreading is demodulated, obtains the corresponding use of the user
Family information includes the mode of following one: directly being demodulated with the interference of other users；Or first with the interference of other users
The symbol of weaker user is solved, then isolates the symbol for receiving the weaker user in signal with symbol level SIC, is removing weaker use
Mirror image processing is done again after the symbol at family, until solving the user information of the user.
A kind of multi-user information co-channel sending device is additionally provided in the present embodiment, the device is for realizing above-described embodiment
And preferred embodiment, the descriptions that have already been made will not be repeated.In addition, term " module " used below may be implemented it is pre-
Determine the combination of the software and/or hardware of function.Although device described in following embodiment is preferably realized with software,
The realization of the combination of hardware or software and hardware is also that may and be contemplated.
As shown in figure 4, the device includes: laminating module 42, spread spectrum module 44, merging module 46 and sending module 48,
In, laminating module 42, for generating according to the modulation symbol for being divided into each user information in each group in N number of user of K group
L superposition symbol, wherein K, N, L are integer, and L >=K >=1, N >=2, L ≠ 1；Spread spectrum module 44 is coupled to laminating module 42,
For using the different sequences in the orthogonal sequence that L length is L to carry out spread spectrum extension to L superposition symbol respectively, L are obtained
Symbol sebolic addressing；Merging module 46 is coupled to spread spectrum module 44, for merging L symbol sebolic addressing, obtains merging symbol sebolic addressing；It sends
Module 48 is coupled to merging module 46, for sending the transmitting signal formed by merging symbol sebolic addressing.
Preferably, laminating module 42 is used for: in the case where K=1, determining the modulation symbol of each user information in user group
It is superposition symbol in the L symbol that L moment is superimposed.In the case where K >=2, each user information in K user group is determined
L symbol being superimposed a moment of modulation symbol be superposition symbol, wherein L=K.
Preferably, laminating module 42 is also used to: laminating module is also used to: in K >=2, and the number of users in kth user group
MkIn the case where=1, determine that the modulation symbol of the single user information in kth user group is superposition symbol of the group a moment
Number；Number of users M in K >=2, and in kth user groupkIn the case where >=2, the multi-user information in kth user group is determined
The superimposed symbol of modulation symbol is superposition symbol of the group a moment；Wherein, k=1,2 ..., K.
Preferably, it is divided into the number of users M of kth user group in N number of user of K groupkIt is 1 or 2 or 3；Wherein, k=
1,2 ..., K.
Preferably, in MkIn the case where >=2, the channel where each user in kth user group is differentiation.
Preferably, the planisphere for being superimposed all possible constellation point compositions of symbol is gray mappings.
Preferably, laminating module 42 is also used to: to M in kth user groupkThe modulation symbol of a user information carries out directly folded
Add coding；Or to M in kth user groupkThe modulation symbol of a user information optimizes rear supercomposed coding.
Preferably, laminating module 42 is also used to: by the M as the modulation symbol of each user information in kth user groupkIt is a multiple
Numerical symbol is directly added, to obtain the superposition symbol of kth user group.
Preferably, laminating module 42 is also used to: the second complex symbol is subjected to mirror image processing, the symbol after obtaining mirror image,
Wherein, the second complex symbol is MkOne in a modulation symbol, or be MkTwo symbols in the modulation symbol of a user information
Number superimposed symbol；First complex symbol is added with the symbol after mirror image, obtains superposition symbol, wherein the first plural number symbol
Number be MkOne in the modulation symbol of a user information.
It preferably, is superposition symbol in the case that the second complex symbol of x1+y1i is x2+y2i in the first complex symbol
It number is one of the following:
Or
Wherein,OrFor mirror image
Symbol afterwards, Xstd+YstdI is not normalized integer lattice constellation symbol S corresponding with the first complex symbolstd,It indicates
It is rounded downwards,Expression rounds up.
Preferably, the corresponding X of BPSKstdValue is { 1, -1 }, YstdTake zero；The corresponding X of QPSKstd、YstdValue be 1 ,-
1}；Corresponding Xstd, Ystd value of 16QAM is { 1, -1,3, -3 }；The corresponding X of 64QAMstd、YstdValue be 1, -1,3, -3,
5, -5,7, -7 }.
Fig. 5 is the preferred structure schematic diagram of multi-user information co-channel sending device according to an embodiment of the present invention, such as Fig. 5 institute
Show, it is preferable that device further include: modulation module 52 is coupled to laminating module 42, for M in kth user groupkA user information
Constellation optimization modulation is carried out, obtains the modulation symbol of each user information in kth user group, wherein k=1,2 ..., K.
Preferably, modulation module 52 is also used to: carrying out 60 degree of apex angle Diamond constellation modulation or triangle to user information
Constellation modulation or the modulation of rectangle constellation.
Preferably, the modulation symbol of each user information is to give unit power modulation symbol distribution power P in kth user groupm
Symbol afterwards, wherein PmIt is represented to the power of the symbol distribution of user m in kth group；M=1,2 ..., Mk；P1+P2+…+PMk=
P；P is that the transmitter of transmitting transmitting signal distributes to the general power of kth group user.
Preferably, the symbol sebolic addressing after L extension is scattered in running time-frequency resource.
Preferably, sending module 48 is also used to: will be merged symbol sebolic addressing and is formed L transmitting signal, and passes through L antenna point
Signal Fa Song not emitted.
The present embodiment additionally provides a kind of multi-user information co-channel reception device, and Fig. 6 is according to an embodiment of the present invention more
The structural schematic diagram of user information co-channel reception device, as shown in fig. 6, the device includes: receiving module 62, despreading 64 and of module
Demodulation module 66, wherein receiving module 62, for the transmitting signal that receiver/transmitter is sent, wherein transmitting signal is: emitting
According to the modulation symbol for being divided into each user information in each group in N number of user of K group on machine, L superposition symbol is generated,
In, K, N, L are integer, and L >=K >=1, N >=2, L ≠ 1；The different sequences in orthogonal sequence for the use of L length being L are right respectively
L superposition symbol carries out spread spectrum extension, obtains L symbol sebolic addressing；Merge L symbol sebolic addressing, obtain merging symbol sebolic addressing, and by
Merge the transmitting signal that symbol sebolic addressing is formed；Despreading module 64 is coupled to receiving module 62, after carrying out channel equalization, uses
Symbol sebolic addressing after frequency expansion sequence despreading merging corresponding with transmitting terminal；Demodulation module 66 be coupled to despreading module 64, for pair
The superposition symbol obtained after despreading is demodulated, and the corresponding user information of the user is obtained.
Preferably, the corresponding frequency expansion sequence of user group where the user and transmitter carry out spread spectrum extension institute to the user group
The frequency expansion sequence used is identical.
Preferably, demodulation module 66 is used for: directly being demodulated with the interference of other users；Or first with other users
Interference solves the symbol of weaker user, then the symbol for receiving the weaker user in signal is isolated with symbol level SIC, removal compared with
Mirror image processing is done again after the symbol of weak user, until solving the user information of the user.
It is illustrated below with reference to the preferred embodiment of the present invention.
It should be noted that describe K user in the preferred embodiment is at a time obtaining K user respectively
The method that multi-user information co-channel in the case where the modulation symbol of information is sent.Those skilled in the art can be according to this preferably
Description in embodiment is illustrated K user at multiple moment and obtains L (L > in the case where not needing to make the creative labor
K) the multi-user information co-channel transmission scheme in the case where the modulation symbol of a user information, will not be described in great detail herein.
The method that a kind of multi-user information co-channel provided in this preferred embodiment is sent, includes the following steps:
Step 1, N number of user is divided into K group, every group can be that multi-user's modulation symbol is directly superimposed or optimization stack generates
The first kind is superimposed symbol, can also be that i.e. the second class of single user modulation symbol is superimposed symbol.Wherein N is greater than the integer equal to 2,
K is greater than the integer equal to 1.It is gray mappings that the first kind, which is superimposed symbol or the symbol constellation of the second class superposition symbol,.
Step 2, when K is more than or equal to 2, symbol or the are superimposed to the first kind using the different sequences in orthogonal sequence set
Two classes superposition symbol carries out spread spectrum extension process, and the symbol sebolic addressing after generating extension merges the symbol sebolic addressing after the extension of K group
Merge symbol sebolic addressing to the first kind.When K is 1, the second class, which merges symbol sebolic addressing, to be accorded with by the modulation of user information each in user group
Number the L symbol that L moment is superimposed be overlapped and spread extension after merge made of merge symbol sebolic addressing.
Step 3, the first kind is merged symbol sebolic addressing by transmitter or the second class merges symbol sebolic addressing and forms multi-antenna transmission letter
Number, receiver is sent to by multiple antennas.
Preferably, N number of user is divided into K group, every group of number of users MkIt can be 1 or 2 or 3, MkWhen not being 1, in same group
Channel where each user is differentiation.
Preferably, the first kind is superimposed symbol, organizes the symbol that interior each user's modulation symbol is directly superimposed generation, or to group
Interior each user information is using optimization constellation modulation, or after doing optimization processing to the modulation symbol of each user information in organizing, superposition
The symbol of generation, superimposed symbol constellation are gray mappings.
Preferably, user's modulation symbol is the symbol distributed after certain power to unit power modulation symbol.Give user m
Modulation symbol distribution power Pm, wherein m=1,2 ..., Mk, MkIt can be 1 or 2 or 3, P1+P2+ ... +=P, P give for transmitter
The general power of this group of user.
In the examples below that, enabling the first complex symbol is x1+y1i, and the second complex symbol is x2+y2i.
Preferably, when modulating user information, using optimization constellation modulation, including but not limited to 60 degree of apex angle diamond shape tune
System, the modulation of triangle constellation；Optimization processing therein can refer to, mirror image processing be carried out to the second complex symbol, after obtaining mirror image
Symbol, the first complex symbol and the symbol after mirror image are overlapped, generate the first kind be superimposed symbol.What is obtained after superposition is folded
The planisphere for all possible constellation point compositions put in marks is gray mappings.In addition, optimization processing can also refer to, the first plural number
Symbol and the second complex symbol are superimposed after being mapped to optimal constellation shape, all possible constellations of the superposition symbol obtained after superposition
The planisphere of point composition is gray mappings.
Preferably, the first complex symbol is superimposed with the symbol after mirror image, the first kind superposition symbol of generation includes following
One of:
Superimposed symbol is
Superimposed symbol is
Wherein,OrFor mirror image
Symbol afterwards, Xstd+YstdI is not normalized integer lattice constellation symbol corresponding with the first complex symbol,It indicates
It is rounded downwards,Expression rounds up.
Wherein, integer lattice constellation symbol S is not normalizedstdFor Xstd+YstdI, such as the corresponding X of BPSKstdValue is
{ 1, -1 }, YstdZero is taken, such as the corresponding X of QPSKstd、YstdValue is { 1, -1 }；The corresponding X of 16QAMstd、YstdValue be 1, -1,
3, -3 }；The corresponding X of 64QAMstd、YstdValue is { 1, -1,3, -3,5, -5,7, -7 }.
Preferably, when K is greater than the integer equal to 2, there are the sequence of K K long, every sequence in the orthogonal sequence set of K × K
Mutual strict orthogonal is arranged, it can be by a sign extended at the sequence of a K long.
It adopts in manner just described, every group of superimposed symbol carries out spread spectrum extension with a sequence in orthogonal sequence set
Processing, the symbol sebolic addressing after generating extension.Preferably, every group of frequency expansion sequence used is different, each superposition sign extended
Symbol sebolic addressing afterwards is scattered in running time-frequency resource.
Preferably, when K is greater than the integer equal to 2, the symbol sebolic addressing after the extension of K group is merged, obtains first kind merging
Symbol sebolic addressing.Wherein, due to using mutually orthogonal frequency expansion sequence, the symbol after the K group extension merged, mutually just
It hands over, does not interfere with each other.
Preferably, when K is greater than the integer equal to 2, the first kind is merged symbol sebolic addressing and forms K transmitting letter by transmitter
Number, receiver is sent to by K antenna respectively.
Corresponding to above-mentioned sending method, it is received that a kind of multi-user information co-channel is additionally provided in the preferred embodiment
Method includes the following steps:
Step 1, the transmitting signal from transmitter is received, wherein transmitting signal is above-mentioned transmitter using above-mentioned
Multi-user information co-channel sending method it is generated.
Step 2, each user group does channel equalization, then is de-spread with the frequency expansion sequence of oneself, then organizes interior user by respective
Corresponded manner demodulates user information.
Preferably, user group is that wherein one group of user, K are greater than the integer equal to 2 in K group user.Each user group is done
Channel equalization, then de-spread with the frequency expansion sequence of oneself.The expansion of frequency expansion sequence that each user group uses and each group in transmitter
Frequency sequence is the same.
Preferably, user is demodulated by respective corresponded manner in each group: for example, user is directly with the interference solution of other users
It adjusts.Alternatively, user first solves the symbol of weaker user with the interference of other users, then reception letter is isolated with symbol level SIC
The symbol of weaker user in number does mirror image processing after removing the symbol of weaker user again, solves the symbol of the user.
The embodiment of the present invention is described in detail below in conjunction with attached drawing.
Present invention preferably provides a kind of multi-user information co-channel sending and receiving methods.Fig. 7 indicate it is a kind of according to and use
The wireless broadcast communication system that method of the invention is implemented.Multi-user information is transferred to multiple user equipmenies by base station (to be had in Fig. 7
UE1 to UE16 has 16 user equipmenies altogether), information of each user from reception signal extraction oneself.It can by user position
User is divided into edge customer, central user and other users, the channel between these three types of users and base station is differentiation.
User N number of in cell is divided into K group, wherein N and K is greater than the integer equal to 2, every group of number of users MkCan be
1 or 2 or 3, MkWhen not being 1, channel where each user is differentiation in same group.Fig. 8 is that N number of user is divided into showing for K group
It is intended to.1st group has M1A user, K group have MKA user, MkUsually take 1,2,3.Such as MkThis group only has 1 user when being 1.Such as
MkThis group has 1 near-end user and 1 remote subscriber when being 2.Such as MkWhen being 3 this group have 1 near-end user, 1 remote subscriber and
1 other users.All numbers of users of K group are N.
Superimposed symbol will be generated after the modulation symbol supercomposed coding of all user informations in every group.Just using K × K
The different sequences in arrangement set (orthogonal sequence for being K including K length) are handed over to carry out every group of superimposed symbol
Extension process is spread, the symbol sebolic addressing after generating extension.Symbol sebolic addressing after extension is formed transmitting signal by transmitter, is sent to
Receiver.It is treatment process of the multi-user information co-channel broadcast system in transmitting terminal as shown in Figure 9.
Detailed process is, after distributing the coded modulation symbol of all user informations in one group to certain power, is directly superimposed
Or be superimposed after optimization, generate superimposed symbol.Give user's m symbol distribution power Pm, wherein m=1,2 ..., Mk.P1+P2+…
+=P, P are the general power that transmitter gives this group of user.If user 1 grows from weak to strong to user Mk and successively sorts, user power
The relations of distribution are,
The first complex symbol is expressed as x1+y1i in one group, and the second complex symbol is expressed as x2+y2i.Directly it is superimposed
Refer to, the first complex symbol is directly added with the second complex symbol and generates superimposed symbol.
Wherein, superposition refers to after optimization, carries out mirror image processing to the second complex symbol, the symbol after obtaining mirror image, by the
Symbol after one complex symbol and mirror image is overlapped coded treatment, generates superimposed symbol.Superimposed symbol owns
The planisphere of possible constellation point composition is gray mappings.
First complex symbol is superimposed with the symbol after mirror image, generating superimposed symbol includes following one:
Superimposed symbol isSuperimposed symbol isWherein, OrFor the symbol after mirror image, Xstd+YstdI be it is corresponding with the first complex symbol not
Normalized integer lattice constellation symbol,It indicates to be rounded downwards,Expression rounds up.
Integer lattice constellation symbol S is not normalizedstdFor Xstd+YstdI, such as the corresponding X of BPSKstdValue is { 1, -1 },
YstdZero is taken, such as the corresponding X of QPSKstd, Ystd value be { 1, -1 }；The corresponding X of 16QAMstd, Ystd value be 1, -1,3, -
3}；The corresponding X of 64QAMstd、YstdValue is { 1, -1,3, -3,5, -5,7, -7 }.
After the completion of K group supercomposed coding, every group of superimposed symbol is spread with a sequence in orthogonal sequence set
Extension process, the symbol sebolic addressing after generating extension.Wherein every group of frequency expansion sequence used is in the orthogonal sequence set of K × K
K K long symbol sebolic addressing, the mutual strict orthogonal of every sequence can be by a sign extended at the sequence of a K long.Often
The frequency expansion sequence that group uses is different, and the symbol sebolic addressing after each superposition sign extended is scattered in running time-frequency resource.
Symbol sebolic addressing after merging each group superposition sign extended forms the symbol sebolic addressing after merging, and extension can be direct sequence
Column spread spectrum is also possible to frequency hop sequences spread spectrum.Symbol after the K group extension merged, it is mutually orthogonal, it is not concerned with mutually
It disturbs.
Symbol sebolic addressing after merging is formed K transmitting signal by last transmitter, is sent to N number of use by K antenna respectively
Family, transmitting signal are scattered in running time-frequency resource, and as shown in Figure 10, the merging symbol sebolic addressing of one 8 length is dispersed in time-frequency money
In source.
Embodiment one
To emphasize the characteristic in the present invention, below preferably representative instance a pair of embodiment of the present invention be described further.
Cell one shares 16 users, this 16 users are divided into 8 groups by base station, wherein user, respectively 1 there are two every group
A edge customer, 1 central user.Channel between edge customer and central user and base station is differentiation.
Superimposed symbol will be generated after the modulation symbol supercomposed coding of all user informations in every group.Just using 8 × 8
The different sequences in arrangement set are handed over to carry out spread spectrum extension process to every group of superimposed symbol, generate the symbol sequence after extending
Column, merge 8 groups of extensions after symbol sebolic addressing merged after symbol sebolic addressing.Symbol sebolic addressing after merging is formed transmitting by base station
Signal is sent to 16 user terminals.It is treatment process of multi-user's modulation symbol in base station as shown in figure 11.
Detailed process is by user information coded modulations all in one group, and to distribute certain power, and generating has certain function
User's modulation symbol of rate.It is that user's modulation symbol generates schematic diagram in one group as shown in figure 12.
Firstly, edge customer information flow and central user information flow A1, A2 are passed through respectively by double message bit stream I1, I2
Turbo encodes to obtain, and base station is according to its channel situation between terminal UE, by edge customer information flow and central user information
Stream A1, A2 are modulated to the symbol of unit power, then give edge customer symbol distribution power P1Obtain the modulation symbol of certain power
Number S1, give central user symbol distribution power P2Obtain the modulation symbol S of certain power2.Wherein P1+P2=P, and P1>P2, P
The general power of reorganization user is given for base station.
Then, S1And S2It is directly superimposed after superposition or optimization, generates superimposed symbol.Assuming that S1For x1+y1i, S2
For x2+y2i, including S1Power be greater than S2Power.It is directly superimposed are as follows: S1+S2, x1+ can also be expressed asy1·i+x2+y2·i.It is the schematic diagram that two QPSK symbols are directly superimposed as shown in figure 13.
It is superimposed after optimization are as follows: complex symbol S1With complex symbol S2Symbol S after mirror image is directly superimposed, directly superimposed
Complex symbol S3It is represented by (S1+ S), it can also be expressed as May be used also
To be expressed asWherein,OrFor the symbol S, X after mirror imagestd+YstdI be it is corresponding with the first complex symbol not
Normalized integer lattice constellation symbol, such as the corresponding X of QPSKstd、YstdValue is { 1, -1 },It indicates to be rounded downwards,
Expression rounds up.It is the schematic diagram being superimposed after two QPSK symbols optimize as shown in figure 14.
After the completion of 8 groups of respective supercomposed codings, every group of superimposed symbol is carried out with a sequence in orthogonal sequence set
Extension process is spread, the symbol sebolic addressing after generating extension.Wherein every group of frequency expansion sequence used comes from 8 × 8 Spread Spectrum Sequence Set
One modulation symbol can be extended to the symbol of one 8 length by the sequence of 88 length in conjunction, the mutual strict orthogonal of every sequence
Sequence.Every group of frequency expansion sequence used is different, is such as extended using frequency expansion sequence C1 for the 1st group, and the 8th group uses frequency expansion sequence C8
It extends, the symbol sebolic addressing after each superposition sign extended is scattered in running time-frequency resource.Figure 15 indicates that a frequency expansion sequence will
The superimposed sign extended schematic diagram of one group of user's modulation symbol.
Merge 8 symbol sebolic addressings being stacked after putting in marks extension, the symbol sebolic addressing after being merged.Symbol after each extension
Sequence is scattered in running time-frequency resource.Extension can be Direct Sequence Spread Spectrum, be also possible to frequency hop sequences spread spectrum.
Symbol sebolic addressing after merging is formed 8 transmitting signals by last base station, is sent to cell 16 by 8 antennas respectively
User, as shown in figure 16.
Embodiment two
Figure 17 indicates that the exemplary receiver structure of the multi-user information co-channel broadcast system of the preferred embodiment of the present invention two is shown
It is intended to.As shown in figure 17, the 1st group of user 1 receives the transmitting signal from transmitter, wherein transmitting signal is that base station uses
Frequency expansion sequence C1 carries out spread processing to the symbol after the modulation symbol supercomposed coding of the 1st group of user information, accords with after generating extension
Number sequence, symbol sebolic addressing after the merging that the symbol sebolic addressing after all groups of extensions is merged.
User 1 does channel equalization, then is de-spread with frequency expansion sequence C1, obtains the information of symbol after corresponding 1st group of user superposition,
Then user information is demodulated by its corresponded manner.If user 1 is weaker user, directly with the dry of other users symbol
Demodulating and decoding is disturbed, 1 information of user is obtained；If user 1 is stronger user, weaker use first is solved with the interference of other users
The symbol at family, then the symbol for receiving the weaker user in signal is isolated with symbol level SIC, after the symbol of the weaker user of removal again
Mirror image processing is done, the user symbol is solved.
After if symbol level SIC is removed the symbol for receiving the weaker user in signal obtained symbol be x2 '+
Y2 ' i then does mirror image processing and is represented byOrWherein Xstd’+Ystd' i be the weaker user symbol that first solves not
Normalized integer lattice constellation symbol, such as the corresponding X of QPSKstd、YstdValue is { 1, -1 },It indicates to be rounded downwards,
Expression rounds up.
Obviously, those skilled in the art should be understood that each module of the above invention or each step can be with general
Computing device realize that they can be concentrated on a single computing device, or be distributed in multiple computing devices and formed
Network on, optionally, they can be realized with the program code that computing device can perform, it is thus possible to which they are stored
It is performed by computing device in the storage device, and in some cases, it can be to be different from shown in sequence execution herein
Out or description the step of, perhaps they are fabricated to each integrated circuit modules or by them multiple modules or
Step is fabricated to single integrated circuit module to realize.In this way, the present invention is not limited to any specific hardware and softwares to combine.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (28)
1. a kind of multi-user information co-channel sending method characterized by comprising
According to the modulation symbol of each user information in each group in the N number of user for being divided into K group, L superposition symbol is generated,
In, K, N, L are integer, and L >=K >=1, N >=2, L ≠ 1；
The different sequences in orthogonal sequence for the use of L length being L carry out spread spectrum extension to the L superposition symbols respectively, obtain
To L symbol sebolic addressing；
Merge the L symbol sebolic addressing, obtains merging symbol sebolic addressing；
Send the transmitting signal formed by the merging symbol sebolic addressing；
Wherein, according to the modulation symbol of each user information in each group in the N number of user for being divided into K group, it is a described folded to generate L
Putting in marks includes: number of users M in the case where K >=2, and in kth user groupkIn the case where >=2, determine that the kth is used
The superimposed symbol of the modulation symbol of multi-user information in the group of family is superposition symbol of the group a moment；Wherein, k=1,
2 ..., K, L=K；
Number of users M in kth user groupkIn the case where >=2, the modulation symbol of the multi-user information in the kth user group is determined
Number superimposed symbol is the mode that superposition symbol of the group a moment includes following one:
To M in kth user groupkThe modulation symbol of a user information is directly superimposed；
To M in kth user groupkThe modulation symbol of a user information is superimposed after optimizing.
2. the method according to claim 1, wherein according to each in each group in the N number of user for being divided into K group
The modulation symbol of user information generates the L superposition symbols further include:
In the case where K=1, the L symbol that the modulation symbol of each user information in user group is superimposed L moment is determined
For the superposition symbol.
3. the method according to claim 1, wherein determining each user in K user group in the case where K >=2
The modulation symbol of information is the superposition symbol in the L symbol that a moment is superimposed further include:
Number of users M in kth user groupkIn the case where=1, the modulation symbol of the single user information in the kth user group is determined
Number for the group a moment superposition symbol.
4. the method according to claim 1, wherein described be divided into kth user group in N number of user of K group
Number of users MkIt is 1 or 2 or 3；Wherein, k=1,2 ..., K.
5. according to the method described in claim 4, it is characterized in that, in MkEach user institute in the case where >=2, in kth user group
Channel be differentiation.
6. the method according to claim 1, wherein the star of all possible constellation point compositions of the superposition symbol
Seat figure is gray mappings.
7. the method according to claim 1, wherein to M in kth user groupkThe modulation symbol of a user information into
It is superimposed after row optimization and includes:
Second complex symbol is subjected to mirror image processing, the symbol after obtaining mirror image, wherein second complex symbol is MkA tune
One in symbol processed, or be MkTwo superimposed symbols of symbol in the modulation symbol of a user information；
First complex symbol is added with the symbol after the mirror image, obtains the superposition symbol, wherein the first plural number symbol
Number be MkOne in the modulation symbol of a user information.
8. the method according to the description of claim 7 is characterized in that being x in first complex symbol1+y1I, the second plural number
Symbol is x2+y2In the case where i, the superposition symbol is one of the following:
Or
Wherein,OrAfter the mirror image
Symbol, Xstd+YstdI is not normalized integer lattice constellation symbol S corresponding with first complex symbolstd,Table
Show downward rounding,Expression rounds up.
9. according to the method described in claim 8, it is characterized in that,
The corresponding X of BPSKstdValue is { 1, -1 }, YstdTake zero；
The corresponding X of QPSKstd、YstdValue is { 1, -1 }；
The corresponding X of 16QAMstd、YstdValue is { 1, -1,3, -3 }；
The corresponding X of 64QAMstd、YstdValue is { 1, -1,3, -3,5, -5,7, -7 }.
10. the method according to claim 1, wherein according to each group in the N number of user for being divided into K group
The modulation symbol of interior each user information, before generating L superposition symbol, the method also includes:
To M in kth user groupkA user information carries out Constellation optimization modulation, obtains the modulation of each user information in kth user group
Symbol, wherein k=1,2 ..., K.
11. according to the method described in claim 10, it is characterized in that, to M in kth user groupkIt is excellent that a user information carries out constellation
Changing modulation includes:
The 60 degree of apex angle Diamond constellation modulation perhaps modulation of triangle constellation or modulation of rectangle constellation.
12. according to the method described in claim 2, it is characterized in that,
The modulation symbol of each user information is to give unit power modulation symbol distribution power P in kth user groupmSymbol afterwards,
In, PmIt is represented to the power of the symbol distribution of user m in kth group；M=1,2 ..., Mk；P1+P2+…+PMk=P；P is transmission institute
The transmitter for stating transmitting signal distributes to the general power of kth group user.
13. method according to any one of claim 1 to 12, which is characterized in that the symbol sebolic addressing after the L extension
It is scattered in running time-frequency resource.
14. according to the method for claim 13, which is characterized in that send the hair formed by the merging symbol sebolic addressing
Penetrating signal includes:
The merging symbol sebolic addressing is formed into L transmitting signal, and the transmitting signal is sent by L antenna respectively.
15. a kind of multi-user information co-channel method of reseptance characterized by comprising
The transmitting signal that receiver/transmitter is sent, wherein the transmitting signal is: basis is divided into K respectively on the transmitter
The modulation symbol of each user information in each group in N number of user of group, generates L superposition symbol, wherein and K, N, L are integer,
And L >=K >=1, N >=2, L ≠ 1；The different sequences in orthogonal sequence for the use of L length being L are respectively to the L superposition symbols
Spread spectrum extension is carried out, L symbol sebolic addressing is obtained；Merge the L symbol sebolic addressing, obtains merging symbol sebolic addressing, and by described
Merge the transmitting signal that symbol sebolic addressing is formed；
After carrying out channel equalization, the symbol sebolic addressing after the merging is de-spread using frequency expansion sequence corresponding with transmitting terminal；
The superposition symbol obtained after despreading is demodulated, the corresponding user information of the user is obtained；
Wherein, according to the modulation symbol of each user information in each group in the N number of user for being divided into K group, it is a described folded to generate L
Putting in marks includes: number of users M in the case where K >=2, and in kth user groupkIn the case where >=2, determine that the kth is used
The superimposed symbol of the modulation symbol of multi-user information in the group of family is superposition symbol of the group a moment；Wherein, k=1,
2 ..., K, L=K；
Number of users M in kth user groupkIn the case where >=2, the modulation symbol of the multi-user information in the kth user group is determined
Number superimposed symbol is the mode that superposition symbol of the group a moment includes following one:
To M in kth user groupkThe modulation symbol of a user information is directly superimposed；
To M in kth user groupkThe modulation symbol of a user information is superimposed after optimizing.
16. according to the method for claim 15, which is characterized in that
The corresponding frequency expansion sequence of user group where the user and transmitter carry out spread spectrum used in spread spectrum extension to the user group
Sequence is identical.
17. method according to claim 15 or 16, which is characterized in that the superposition symbol obtained after despreading into
Row demodulation, obtains the mode that the corresponding user information of the user includes following one:
Directly demodulated with the interference of other users；Or
The symbol of weaker user is first solved with the interference of other users, then isolates the institute received in signal with symbol level SIC
The symbol of weaker user is stated, does mirror image processing again after removing the symbol of the weaker user, until solving user's letter of the user
Breath.
18. a kind of multi-user information co-channel sending device characterized by comprising
Laminating module, for generating L according to the modulation symbol for being divided into each user information in each group in N number of user of K group
A superposition symbol, wherein K, N, L are integer, and L >=K >=1, N >=2, L ≠ 1；
Spread spectrum module, for use the different sequences in the orthogonal sequence that L length is L respectively to L superposition symbols into
Row spread spectrum extension, obtains L symbol sebolic addressing；
Merging module obtains merging symbol sebolic addressing for merging the L symbol sebolic addressing；
Sending module, for sending the transmitting signal formed by the merging symbol sebolic addressing；
Wherein, the laminating module is used for: according to the modulation of each user information in each group in the N number of user for being divided into K group
Symbol, generating the L superposition symbols includes: number of users M in the case where K >=2, and in kth user groupk>=2 feelings
Under condition, the superimposed symbol of modulation symbol for determining the multi-user information in the kth user group is the group a moment
It is superimposed symbol；Wherein, k=1,2 ..., K, L=K；
Number of users M in kth user groupkIn the case where >=2, the modulation symbol of the multi-user information in the kth user group is determined
Number superimposed symbol is the mode that superposition symbol of the group a moment includes following one:
To M in kth user groupkThe modulation symbol of a user information is directly superimposed；
To M in kth user groupkThe modulation symbol of a user information is superimposed after optimizing.
19. device according to claim 18, which is characterized in that the laminating module is also used to:
In the case where K=1, the L symbol that the modulation symbol of each user information in user group is superimposed L moment is determined
For the superposition symbol.
20. device according to claim 19, which is characterized in that the laminating module is also used to:
Number of users M in K >=2, and in kth user groupkIn the case where=1, the single user letter in the kth user group is determined
The modulation symbol of breath is superposition symbol of the group a moment.
21. device according to claim 18, which is characterized in that the laminating module is also used to:
Second complex symbol is subjected to mirror image processing, the symbol after obtaining mirror image, wherein second complex symbol is MkA tune
One in symbol processed, or be MkTwo superimposed symbols of symbol in the modulation symbol of a user information；
First complex symbol is added with the symbol after the mirror image, obtains the superposition symbol, wherein the first plural number symbol
Number be MkOne in the modulation symbol of a user information.
22. device according to claim 18, which is characterized in that described device further include:
Modulation module, for M in kth user groupkA user information carries out Constellation optimization modulation, obtains respectively using in kth user group
The modulation symbol of family information, wherein k=1,2 ..., K.
23. device according to claim 22, which is characterized in that the modulation module is also used to:
60 degree of apex angle Diamond constellation modulation perhaps modulation of triangle constellation or the modulation of rectangle constellation are carried out to user information.
24. device described in any one of 8 to 23 according to claim 1, which is characterized in that the symbol sequence after the L extension
It is listed in running time-frequency resource and is scattered.
25. device according to claim 24, which is characterized in that the sending module is also used to:
The merging symbol sebolic addressing is formed into L transmitting signal, and the transmitting signal is sent by L antenna respectively.
26. a kind of multi-user information co-channel reception device characterized by comprising
Receiving module, for the transmitting signal that receiver/transmitter is sent, wherein the transmitting signal is: dividing on the transmitter
Not according to the modulation symbol for being divided into each user information in each group in N number of user of K group, L superposition symbol is generated,
In, K, N, L are integer, and L >=K >=1, N >=2, L ≠ 1；The different sequences in orthogonal sequence for the use of L length being L are right respectively
The L superposition symbols carry out spread spectrum extension, obtain L symbol sebolic addressing；Merge the L symbol sebolic addressing, obtains merging symbol
Number sequence, and the transmitting signal formed by the merging symbol sebolic addressing；
Despreading module de-spreads the symbol after the merging using frequency expansion sequence corresponding with transmitting terminal after carrying out channel equalization
Number sequence；
Demodulation module obtains the corresponding user information of the user for demodulating to the superposition symbol obtained after despreading；
Wherein, the L superposition symbols generate in the following way: in the case where K >=2, and in kth user group
Number of users MkIn the case where >=2, determine that the superimposed symbol of modulation symbol of the multi-user information in the kth user group is to be somebody's turn to do
Superposition symbol of the group a moment；Wherein, k=1,2 ..., K, L=K；
Number of users M in kth user groupkIn the case where >=2, the modulation symbol of the multi-user information in the kth user group is determined
Number superimposed symbol is the mode that superposition symbol of the group a moment includes following one:
To M in kth user groupkThe modulation symbol of a user information is directly superimposed；
To M in kth user groupkThe modulation symbol of a user information is superimposed after optimizing.
27. device according to claim 26, which is characterized in that the corresponding frequency expansion sequence of user group where the user and hair
Penetrate machine to the user group carry out spread spectrum extend used in frequency expansion sequence it is identical.
28. the device according to claim 26 or 27, which is characterized in that the demodulation module is used for:
Directly demodulated with the interference of other users；Or
The symbol of weaker user is first solved with the interference of other users, then isolates the institute received in signal with symbol level SIC
The symbol for stating weaker user does mirror image processing after the symbol for removing the weaker user again, until solving the user of the user
Information.
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| CN106160827B (en) * | 2015-04-21 | 2020-12-25 | 中兴通讯股份有限公司 | Multi-user information processing method and device |
| CN107508661B (en) * | 2016-06-14 | 2020-07-21 | 华为技术有限公司 | Data processing method, network equipment and terminal |
| CN106162846B (en) * | 2016-06-21 | 2017-05-10 | 华中科技大学 | Two-user NOMA (Non-Orthogonal Multiple Access) downlink energy efficiency optimization method in consideration of SIC (Successive Interference Cancellation) energy consumption |
| CN106385300B (en) * | 2016-08-31 | 2018-09-18 | 上海交通大学 | Uplink NOMA power distribution methods based on dynamic decoder SIC receivers |
| CN107819541B (en) * | 2016-09-10 | 2019-06-21 | 北京信威通信技术股份有限公司 | A kind of method and device of transmission |
| CN109661786B (en) * | 2016-11-10 | 2020-04-14 | 华为技术有限公司 | Apparatus and method for wireless communication using multiple access |
| CN108430040B (en) * | 2017-02-14 | 2021-02-26 | 王晋良 | Joint user grouping and power allocation method and base station using same |
| TWI628969B (en) * | 2017-02-14 | 2018-07-01 | 國立清華大學 | Joint user clustering and power allocation method and base station using the same |
| EP3459309A4 (en) * | 2017-05-27 | 2019-05-15 | Telefonaktiebolaget LM Ericsson (publ) | Method and device for resource configuration |
| CN109617567A (en) * | 2017-09-30 | 2019-04-12 | 株式会社Ntt都科摩 | Frequency expansion sequence selection method, the method for adjustment of transmission power and communication device |
| CN109981511B (en) * | 2017-12-27 | 2021-09-03 | 华为技术有限公司 | Data transmission based on non-orthogonal multiple access |
| CN111434073B (en) * | 2018-01-12 | 2022-05-10 | 中兴通讯股份有限公司 | Wireless communication method, apparatus and computer-readable program storage medium |
| CN108288998B (en) * | 2018-01-23 | 2020-07-10 | 内蒙古科技大学 | Multi-user traffic optical communication method and system based on chaos binary sequence |
| US10771105B2 (en) * | 2018-02-22 | 2020-09-08 | Qualcomm Incorporated | Configuration of NOMA communication using multiple sets of spreading sequences |
| CA3125352C (en) | 2018-03-05 | 2023-10-24 | Zte Corporation | Transmissions using spreading codes |
| WO2019242006A1 (en) * | 2018-06-22 | 2019-12-26 | Nokia Shanghai Bell Co., Ltd. | Modulated symbol spreading |
| CN108989253B (en) * | 2018-09-26 | 2020-11-10 | 南京信息工程大学 | Optical probability shaping method based on diamond modulation and symbol-level partial marking mode |
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| CN101558611A (en) * | 2006-04-25 | 2009-10-14 | Lg电子株式会社 | A method of configuring multiuser packet and a structure thereof in a wireless communication system |
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