CN106656291A - Data information obtaining method and interference alignment network system - Google Patents
Data information obtaining method and interference alignment network system Download PDFInfo
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- CN106656291A CN106656291A CN201611248642.9A CN201611248642A CN106656291A CN 106656291 A CN106656291 A CN 106656291A CN 201611248642 A CN201611248642 A CN 201611248642A CN 106656291 A CN106656291 A CN 106656291A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/022—Site diversity; Macro-diversity
- H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
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- 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
Abstract
The embodiment of the invention provides a data information obtaining method, relates to the technical field of communication, and can obtain data information of users in an interference alignment network system. The method comprises the following steps: when data information of a user a is obtained, a processor calculates a pre-coding matrix and a decoding matrix of K user signals through an interference alignment algorithm; furthermore, according to a calculation result, a pre-coding matrix and a decoding matrix of signals of other users, except the user a, are re-configured, so that a user b aligns interference signals of other users, except the user a, to an expected signal itself in the second appointed direction when receiving the signals; the interference signal of the user a is in another direction different from the second appointed direction; a transmitter transmits signals according to the re-configured pre-coding matrix and decoding matrix; and a receiver b receives the signals, and analyzes the interference signal of the user a so as to obtain data information thereof. The technical scheme provided in the embodiment of the invention is suitable for a process of obtaining user data information.
Description
【Technical field】
The present invention relates to communication technical field, more particularly to a kind of method for obtaining data message and interference alignment network system
System.
【Background technology】
At present, state security department is more valued social safety, for by the intelligent and multiple of cordless communication network
Polygamy obtains necessary information to track down case of violating the law, and also increasingly obtains state security department's attention.
With the fast development of cordless communication network, user within a wireless communication network is more and more, between user
Signal interference is also increasingly severe.Interference alignment techniques are that for just having risen in recent years effectively removes signal interference between user
Technological means.In the cordless communication network using interference alignment techniques, by the interference constraints between user in a certain specific
Subspace and then preferably elimination, therefore all of node is both needed to the global channel information of known whole network.It is right for disturbing
This feature of neat network, can obtain the information of certain user in interference alignment network internal by cooperation among users, be based on
This is imperative developing the method for acquisition of information with power-assisted state security department.
【The content of the invention】
In view of this, the method and interference alignment network system of a kind of acquisition data message are embodiments provided,
The data message of user in interference alignment network system can be obtained, for national correlation department help is provided, improve social safety
Property.
On the one hand, the embodiment of the present invention provides a kind of method for obtaining data message, it is adaptable to interference alignment network system,
Methods described includes：
The interference alignment network system has K user, and including processor, transmitter and receiver, each user couple
A processor and emitter, a receiver are answered,
When the data message of user a is obtained, K processor is prelisted by interference alignment algorithm to K subscriber signal
Code matrix and decoding matrix are calculated；
K processor according to the result of calculation, reconfigure it is described interference alignment network system in addition to user a other
The pre-coding matrix and decoding matrix of subscriber signal, so that user a exists the interference signal of other users when signal is received
First assigned direction aligns, and the desired signal of itself is placed in into other directions different from first assigned direction, and makes user b
When signal is received by the interference signal of other users in addition to user a and the desired signal of itself in the second assigned direction pair
Together, the interference signal of user a is placed in into other directions different from second assigned direction；
K emitter according to the pre-coding matrix and decoding matrix of user's a signals and after reconfiguring in addition to user a
The pre-coding matrix and decoding matrix emissive signal of other users signal；
Receiver b receives signal, and parses the interference signal of user a to obtain the data of user a by interference alignment
Information；
Wherein, the signal that each receiver is received includes desired signal and interference signal, each emitter transmission signal
Afterwards, the signal that corresponding receiver is received is referred to as desired signal, and the signal that other receivers are received referred to as is disturbed
Signal；
Wherein, a and b is numbering, and the processor of owning user, emitter, receiver are identical with Customs Assigned Number；
Wherein, K is the natural number more than 3.
On the other hand, the embodiment of the present invention provides a kind of interference alignment network system：
The interference alignment network system has K user, and including processor, transmitter and receiver, each user couple
A processor and emitter, a receiver are answered,
K processor, for when the data message of user a is obtained, by disturbing alignment algorithm to K subscriber signal
Pre-coding matrix and decoding matrix are calculated；And according to the result of calculation, reconfigure the interference alignment network system
The pre-coding matrix and decoding matrix of the interior other users signal in addition to user a, so that user a uses other when signal is received
The interference signal at family is alignd in the first assigned direction, by the desired signal of itself be placed in different from first assigned direction other
Direction, and make user b when signal is received by the interference signal of other users in addition to user a and the desired signal of itself the
Two assigned directions align, and the interference signal of user a is placed in into other directions different from second assigned direction；
K emitter, for according to the pre-coding matrix and decoding matrix of user's a signals and after reconfiguring except use
The pre-coding matrix and decoding matrix emissive signal of the outer other users signals of family a；
Receiver b, for receiving signal, and aligns the interference signal for parsing user a to obtain user a's by interference
Data message；
Wherein, the signal that each receiver is received includes desired signal and interference signal, each emitter transmission signal
Afterwards, the signal that corresponding receiver is received is referred to as desired signal, and the signal that other receivers are received referred to as is disturbed
Signal；
Wherein, a and b is numbering, and the processor of owning user, emitter, receiver are identical with Customs Assigned Number；
Wherein, K is the natural number more than 3.
The method and interference alignment network system of a kind of acquisition data message are embodiments provided, it is right for disturbing
The interaction feature of global channel information, is matched somebody with somebody again by the pre-coding matrix and decoding matrix to subscriber signal in neat network
The data message for obtaining certain user in cordless communication network is put, this method can apply to must with acquisition in national correlation department
Information is wanted, for relevant departments help is provided, improve social safty.
【Description of the drawings】
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below will be attached to what is used needed for embodiment
Figure is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this area
For those of ordinary skill, without having to pay creative labor, can be with other attached according to these accompanying drawings acquisitions
Figure.
Fig. 1 is a kind of method flow diagram for obtaining data message provided in an embodiment of the present invention；
Fig. 2 is another kind of method flow diagram for obtaining data message provided in an embodiment of the present invention；
Fig. 3 is that a kind of data message that obtains provided in an embodiment of the present invention realizes schematic diagram；
Fig. 4 is another kind of method flow diagram for obtaining data message provided in an embodiment of the present invention；
Fig. 5 is another kind of method flow diagram for obtaining data message provided in an embodiment of the present invention；
Fig. 6 is a kind of Experimental Comparison figure provided in an embodiment of the present invention；
Fig. 7 is another kind of Experimental Comparison figure provided in an embodiment of the present invention；
Fig. 8 is another kind of Experimental Comparison figure provided in an embodiment of the present invention；
Fig. 9 is another kind of Experimental Comparison figure provided in an embodiment of the present invention；
Figure 10 is a kind of composition frame chart of interference alignment network system provided in an embodiment of the present invention.
【Specific embodiment】
In order to be better understood from technical scheme, the embodiment of the present invention is retouched in detail below in conjunction with the accompanying drawings
State.
It will be appreciated that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.Base
Embodiment in the present invention, those of ordinary skill in the art obtained under the premise of creative work is not made it is all its
Its embodiment, belongs to the scope of protection of the invention.
The term for using in embodiments of the present invention is, only merely for the purpose of description specific embodiment, and to be not intended to be limiting
The present invention." one kind ", " described " and " being somebody's turn to do " of singulative used in the embodiment of the present invention and appended claims
It is also intended to include most forms, unless context clearly shows that other implications.
It should be appreciated that term "and/or" used herein is only a kind of incidence relation of description affiliated partner, represent
There may be three kinds of relations, for example, A and/or B can be represented：Individualism A, while there is A and B, individualism B these three
Situation.In addition, character "/" herein, typicallys represent forward-backward correlation pair as if a kind of relation of "or".
Embodiments provide a kind of method of acquisition data message, it is adaptable to interference alignment network system, be suitable for
During acquisition of information.
Wherein, the interference alignment network system refers to one kind and uses effective interference management mechanism, by precoding skill
Art makes interference overlap at receiver, and with thorough the network system that interference affects on desired signal, including process are eliminated
Device, transmitter and receiver, the network system of interference alignment described in the embodiment of the present invention is the microcellulor network comprising K user
System, each user's one processor of correspondence and emitter, a receiver, K is the natural number more than 3.
Wherein, the processor refers to complete the module that signal matrix is calculated in the interference alignment network system.
The emitter refers to little base station, i.e. public mobile communication base station, in certain area of radio coverage, leads to
Mobile switching center is crossed, the mini radio transmitting-receiving letter radio station of information transmission is carried out between mobile telephone terminal.
The receiver refers to user terminal, including individual's electricity that mobile phone, computer, PC etc. can be interacted with base station
Sub- equipment.
As shown in figure 1, methods described includes：
101st, when the data message of user a is obtained, K processor is by disturbing alignment algorithm to K subscriber signal
Pre-coding matrix and decoding matrix are calculated.
Coding is the process that information is converted to another kind of form or form from a kind of form or form, with prespecified side
Method is by information, data conversion into the electric impulse signal for specifying.Decoding, is the inverse process of coding.It is described pre- in the embodiment of the present invention
Encoder matrix refers to carry out subscriber signal in the matrix of advance coding, and the decoding matrix refers to solve subscriber signal
The matrix of code.In wireless communications, encoding and decoding technique comparative maturity, each signal has according to different demands and prelists accordingly
Code matrix and decoding matrix, can change user and receive signal in the embodiment of the present invention by pre-coding matrix and decoding matrix
When parse desired signal interference alignment thereof.
Wherein, a is numbering, and the processor of owning user, emitter, receiver are identical with Customs Assigned Number.
102nd, K processor reconfigures the interference alignment network system interior in addition to user a according to the result of calculation
The pre-coding matrix and decoding matrix of other users signal, so that user a believes the interference of other users when signal is received
Number in the alignment of the first assigned direction, the desired signal of itself is placed in into other directions different from first assigned direction, and make
User b is when signal is received by the interference signal of other users in addition to user a and the desired signal of itself in the second designated parties
To alignment, the interference signal of user a is placed in into other directions different from second assigned direction.
Wherein, the signal that each user receives includes desired signal and interference signal, each emitter transmission signal it
Afterwards, the signal that corresponding receiver is received is referred to as desired signal, and the signal that other receivers are received referred to as disturbs letter
Number.The desired signal carries the useful signal of user data information.The interference signal by user transmit desired signal when
Disturb each other and produce, the desired signal transmission quality of user can be affected.
Wherein, b is numbering.
Wherein, first assigned direction and second assigned direction refer to the arbitrary direction in space.
103rd, K emitter according to the pre-coding matrix and decoding matrix of user's a signals and after reconfiguring except use
The pre-coding matrix and decoding matrix emissive signal of the outer other users signals of family a.
104th, receiver b receives signal, and aligns the interference signal for parsing user a to obtain user a's by interference
Data message.
A kind of method of acquisition data message is embodiments provided, for global channel letter in interference alignment network
The interaction feature of breath, carries out reconfiguring acquisition cordless communication network by the pre-coding matrix and decoding matrix to subscriber signal
In certain user data message, this method can apply in national correlation department obtain necessary information, be relevant departments
There is provided help, social safty is improved.
Furthermore, it is understood that with reference to preceding method flow process, the alternatively possible implementation of the embodiment of the present invention is also provided
User a obtains the detailed process of itself desired signal, after step 103, such as Fig. 2 in the interference alignment network system
It is shown, including step in detail below：
105th, receiver a receives signal, and parses the desired signal of itself by interference alignment.
In step 105, the receiver of user a is received after signal, and by interference alignment the desired signal of itself is parsed,
Compared to reconfiguring in addition to user a before the pre-coding matrix and decoding matrix of other users signal, the interference signal of user a
There is no any change in direction and desired signal direction, such user b obtains the data message of user a would not be felt by user a
Observe.
As shown in figure 3, give the embodiment of the present invention realizes schematic diagram.
Furthermore, it is understood that with reference to preceding method flow process, the embodiment of the present invention additionally provides in addition to user a and user b other
User obtains the detailed process of itself desired signal in the interference alignment network system.
In order to make user b that the data message of user a is obtained in the case where user a does not perceive, and in addition to user a
The pre-coding matrix and decoding matrix of other users is reconfigured, and will necessarily sacrifice the communication quality of some users, that is, disturb right
Some users still can obtain itself desired signal by interference alignment in neat network system, and communication quality is unaffected, and has
A little users can not obtain the desired signal of itself by interference alignment, and communication quality declines, based on this, after step 103, this
Inventive embodiments provide following two specific implementations：
The first implementation, as shown in figure 4, including step in detail below：
106th, the G receiver in addition to receiver a and receiver b in other K-2 receivers receives signal, and by most
Bigization signal to noise ratio parses the desired signal of itself.
Wherein, to obtain itself desired signal, the number of users that communication quality declines by interference alignment, G is little to G
In the natural number of K-2.
Wherein, the dry ratio than referring to desired signal and the intensity of interference plus noise of the letter, by maximizing noise
Than the desired signal that mass has declined can be parsed.
Second implementation, as shown in figure 5, including step in detail below：
107th, the K-2-G receiver in addition to receiver a and receiver b in other K-2 receivers receives signal, and leads to
Cross interference alignment and parse the desired signal of itself.
Furthermore, it is understood that with reference to preceding method flow process, user b obtains the data of user a in the case where user a does not perceive
Information, it is desirable to which number of users G for causing communication quality to decline is the smaller the better, in order to determine the minimum of a value of G, for step 106
Realize, the alternatively possible implementation of the embodiment of the present invention additionally provides flow process in detail below, using acquisition data message
The formula (1) of the feasibility condition of method, to determine the span of G, and then the span from fixed G determines G's
Minimum of a value：
(K-1)(M+N-2d)-G(N-d)≥d(K-1)(K-G) (1)
According to calculating formula (1), the span for obtaining G is as follows：
Wherein, M and N are respectively the antenna number in the interference alignment network system on each emitter and each receiver
Mesh, d is the information data flow amount of each user's transmission, and M, N, d are natural number.
As can be seen that when d spans are different, the minimum of a value of G is also different from formula (2).
As d=M ＜ N, G minimums can be with value 0, you can make user b exist not sacrifice the communication quality of any user
User a obtains the data message of user a in the case of not perceiving.
As d ＜ min (M, N), G minimums can be with valueThe communication quality for sacrificing a part of user is needed to make
User b obtains the data message of user a in the case where user a does not perceive.
As d=N ＜ M, G needs to sacrifice the communication quality of every other user to make user b in user for just infinite
A obtains the data message of user a in the case of not perceiving.
In order to be better understood from the beneficial effect of the technical program, the embodiment of the present invention is given herein in connection with accompanying drawing and experimental result
Detailed description below is gone out：
In the interference alignment network system of a K=5 user, the information data flow amount d of each user's transmission is 2.
According to interference alignment feasibility condition M+N >=d (K+1), make M+N=12, wherein M and N be respectively each user transmitter and
Number of antennas on receiver.Assume that user 5 obtains the data message of user 1, all of channel obeys the decline of Rayleigh block, often
The known preferably global channel information of individual node.
Embodiment one
In figure 6, the signal transmission speed in the case of the signal to noise ratio value difference of emitter transmission signal, to user 1
The signal transmission rate of rate, the signal averaging transfer rate of other users and user 5 is compared, and makes communication quality decline
Number of users G value 2, N values 6 or 7.Knowable to experimental result, the signal transmission rate of user 1 and user 5 is in M=6 and N
It is higher than during M=5 and N=7 when=6, this is because, as N=7, according to the feasibility condition in formula (1), the program becomes
Obtain infeasible, now, the data message for realizing him also there occurs leakage by user 1.Therefore, under such condition, should ensure that N<
7。
Embodiment two
In the figure 7, in the case of to different N, the interference at each receiver user is revealed and is compared.From experimental result
Understand, when 2≤N≤6 or N=10, the interference of user 1, user 4 and user 5 leakage is 0, it is feasible in this and formula (1)
Property condition is consistent.When 7≤N≤9, the interference leakage power (P) of these users is no longer 0, therefore, the program also becomes not
It is feasible.
Embodiment three
In fig. 8, under the different value conditions of N, the signal averaging of signal transmission rate, other users to user 1
The signal transmission rate of transfer rate and user 5 is compared, and signal to noise ratio is set to 40dB.Knowable to experimental result, as 2≤N
When≤6 or N=10, the close 25bits/s/Hz of the rate of information throughput of user 1 and user 4 is bright in the range of 7≤N≤9
Aobvious to decline, the conclusion of the feasibility condition in this and formula (1) is consistent.The signal transmission rate of user 5 increases with N from 2
Lifted to 6, but be decreased obviously in the range of 7≤N≤9.As N=10, the rate of information throughput of user 5 is close to
25bits/s/Hz, it is consistent with user 1 and user 4.This is because the power of the acquisition data message of user 5 is with the increase of N
Diminish.As N=2, the signal transmission rate of user 5 is changed into 0, therefore, the point is simultaneously infeasible.Above-mentioned conclusion is arranged,
The program is feasible at 3≤N≤6 or N=10.
Embodiment four
In fig .9, in the case of different N, adopt and do not adopt acquisition data message provided in an embodiment of the present invention
Method, the signal transmission rate of user 5 is compared.Knowable to simulation result, when 2≤N≤6, using of the invention real
When applying the method for acquisition data message of example offer, the signal transmission rate of user 5 will be far above speed when not adopting.When 9
During≤N≤10, during using with the method for not adopting acquisition data message provided in an embodiment of the present invention, the signal transmission of user 5
Speed is consistent.Wherein, signal to noise ratio refers to the signal to noise ratio of emitter transmission signal in accompanying drawing 9.
DB refers to decibel, Shi Chun digits in the accompanying drawing of aforementioned four embodiment；Bits/s/Hz is bps/
Hertz, refer to signal transmission rate unit.
Embodiments provide a kind of interference alignment network system, it is adaptable to which said method flow process, the interference is right
Neat network system has K user, and including processor, transmitter and receiver, each user corresponds to a processor and one
Emitter, a receiver, as shown in Figure 10, the interference alignment network system includes：
K processor (1,2,3 ... K-1, K), for when the data message of user a is obtained, being calculated by interference alignment
Method is calculated the pre-coding matrix and decoding matrix of K subscriber signal；And according to the result of calculation, reconfigure described
The pre-coding matrix and decoding matrix of the interior other users signal in addition to user a of interference alignment network system, so that user a is being received
The interference signal of other users is alignd in the first assigned direction to during signal, the desired signal of itself is placed in different from described
Other directions of one assigned direction, and make user b when signal is received by the interference signal of other users in addition to user a with from
The desired signal of body aligns in the second assigned direction, by the interference signal of user a be placed in different from second assigned direction its
Its direction.
K emitter (1,2,3 ... K-1, K), for according to the pre-coding matrix and decoding matrix of user's a signals and
The pre-coding matrix of other users signal in addition to user a and decoding matrix emissive signal after reconfiguring.
Receiver b, for receiving signal, and aligns the interference signal for parsing user a to obtain user a's by interference
Data message.
Wherein, the signal that each receiver is received includes desired signal and interference signal, each emitter transmission signal
Afterwards, the signal that corresponding receiver is received is referred to as desired signal, and the signal that other receivers are received referred to as is disturbed
Signal.
Wherein, a and b is numbering, and the processor of owning user, emitter, receiver are identical with Customs Assigned Number.
Wherein, K is the natural number more than 3.
Optionally, receiver a, for receiving signal, and parses the desired signal of itself by interference alignment.
Optionally, the G receiver in addition to receiver a and receiver b in other K-2 receivers, for receiving letter
Number, and parse the desired signal of itself by maximizing signal to noise ratio.
And/or,
The K-2-G receiver in addition to receiver a and receiver b in other K-2 receivers, for receiving signal, and
The desired signal of itself is parsed by interference alignment.
Wherein, G is the natural number less than K-2.
Optionally, the G receiver in addition to receiver a and receiver b in other K-2 receivers is using obtaining
Fetch data information approach feasibility condition formula (1), to determine the span of G, and then from the value model of fixed G
Enclose the minimum of a value for determining G：
(K-1)(M+N-2d)-G(N-d)≥d(K-1)(K-G) (1)
According to calculating formula (1), the span for obtaining G is as follows：
Wherein, M and N are respectively the antenna number in the interference alignment network system on each emitter and each receiver
Mesh, d is the information data flow amount of each user's transmission, and M, N, d are natural number.
A kind of interference alignment network system is embodiments provided, for global channel information in interference alignment network
Interaction feature, carry out reconfiguring in acquisition cordless communication network by the pre-coding matrix and decoding matrix to subscriber signal
The data message of certain user, can apply to, to obtain necessary information in national correlation department, for relevant departments help be provided,
Improve social safty.
Those skilled in the art can be understood that, for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, may be referred to the corresponding process in preceding method embodiment, will not be described here.
In several embodiments provided by the present invention, it should be understood that disclosed system, apparatus and method can be with
Realize by another way.For example, device embodiment described above is only schematic, for example, the unit
Divide, only a kind of division of logic function there can be other dividing mode when actually realizing, for example, multiple units or group
Part can with reference to or be desirably integrated into another system, or some features can be ignored, or not perform.It is another, it is shown
Or discuss coupling each other direct-coupling or communication connection can be by the indirect of some interfaces, device or unit
Coupling is communicated to connect, and can be electrical, mechanical or other forms.
The unit as separating component explanation can be or may not be it is physically separate, it is aobvious as unit
The part for showing can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can according to the actual needs be selected to realize the mesh of this embodiment scheme
's.
In addition, each functional unit in each embodiment of the invention can be integrated in a processing unit, it is also possible to
It is that unit is individually physically present, it is also possible to which two or more units are integrated in a unit.Above-mentioned integrated list
Unit both can be realized in the form of hardware, it would however also be possible to employ hardware adds the form of SFU software functional unit to realize.
The above-mentioned integrated unit realized in the form of SFU software functional unit, can be stored in an embodied on computer readable and deposit
In storage media.Above-mentioned SFU software functional unit is stored in a storage medium, including some instructions are used so that a computer
Device (can be personal computer, server, or network equipment etc.) or processor (Processor) perform the present invention each
The part steps of embodiment methods described.And aforesaid storage medium includes：USB flash disk, portable hard drive, read-only storage (Read-
Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disc or CD etc. it is various
Can be with the medium of store program codes.
Presently preferred embodiments of the present invention is the foregoing is only, not to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvements done etc. should be included within the scope of protection of the invention.
Claims (8)
1. a kind of method for obtaining data message, it is adaptable to interference alignment network system, it is characterised in that the interference is alignd net
Network system has K user, and including processor, transmitter and receiver, each user corresponds to a processor and a transmitting
Machine, a receiver, methods described includes：
When the data message of user a is obtained, precoding square of the K processor by interference alignment algorithm to K subscriber signal
Battle array and decoding matrix are calculated；
K processor reconfigures the interior other users in addition to user a of the interference alignment network system according to the result of calculation
The pre-coding matrix and decoding matrix of signal so that user a when signal is received by the interference signal of other users first
Assigned direction aligns, and the desired signal of itself is placed in into other directions different from first assigned direction, and is meeting user b
The interference signal of other users in addition to user a is alignd with the desired signal of itself in the second assigned direction when receiving signal, will
The interference signal of user a is placed in other directions different from second assigned direction；
K emitter according to the pre-coding matrix and decoding matrix of user's a signals and after reconfiguring in addition to user a other
The pre-coding matrix and decoding matrix emissive signal of subscriber signal；
Receiver b receives signal, and parses the interference signal of user a to obtain the data message of user a by interference alignment；
Wherein, the signal that each receiver is received includes desired signal and interference signal, after each emitter transmission signal,
The signal that corresponding receiver is received is referred to as desired signal, and the signal that other receivers are received is referred to as interference signal；
Wherein, a and b is numbering, and the processor of owning user, emitter, receiver are identical with Customs Assigned Number；
Wherein, K is the natural number more than 3.
2. method according to claim 1, it is characterised in that precoding square of the K emitter according to user's a signals
Battle array and decoding matrix and the pre-coding matrix of other users signal except user a in addition to after reconfiguring and decoding matrix emissive are believed
After number, methods described also includes：
Receiver a receives signal, and parses the desired signal of itself by interference alignment.
3. method according to claim 1, it is characterised in that precoding square of the K emitter according to user's a signals
Battle array and decoding matrix and the pre-coding matrix of other users signal except user a in addition to after reconfiguring and decoding matrix emissive are believed
After number, methods described also includes：
The G receiver in addition to receiver a and receiver b in other K-2 receivers receives signal, and by maximizing noise
Than parsing the desired signal of itself；
And/or,
The K-2-G receiver in addition to receiver a and receiver b in other K-2 receivers receives signal, and right by disturbing
The desired signal of itself is parsed together；
Wherein, G is the natural number less than K-2.
4. method according to claim 3, it is characterised in that described other K-2 in addition to receiver a and receiver b connect
G receiver in receipts machine receives signal, and parses the desired signal of itself by maximizing signal to noise ratio, has used acquisition number
It is to determine the span of G and then true from the span of fixed G according to the formula (1) of the feasibility condition of information approach
Determine the minimum of a value of G：
(K-1)(M+N-2d)-G(N-d)≥d(K-1)(K-G) (1)
According to calculating formula (1), the span for obtaining G is as follows,
Wherein, M and N are respectively the number of antennas in the interference alignment network system on each emitter and each receiver, d
For the information data flow amount of each user's transmission, M, N, d are natural number.
It is 5. a kind of to disturb alignment network system, it is characterised in that：
The interference alignment network system has K user, and including processor, transmitter and receiver, each user's correspondence one
Individual processor and emitter, a receiver,
K processor, for when the data message of user a is obtained, being prelisted to K subscriber signal by disturbing alignment algorithm
Code matrix and decoding matrix are calculated；And according to the result of calculation, reconfigure and removed in the interference alignment network system
The pre-coding matrix and decoding matrix of the outer other users signals of user a so that user a when signal is received by other users
Interference signal is alignd in the first assigned direction, and the desired signal of itself is placed in into other sides different from first assigned direction
To, and make user b when signal is received by the interference signal of other users in addition to user a and the desired signal of itself second
Assigned direction aligns, and the interference signal of user a is placed in into other directions different from second assigned direction；
K emitter, for according to the pre-coding matrix and decoding matrix of user's a signals and after reconfiguring except user a
The pre-coding matrix and decoding matrix emissive signal of outer other users signal；
Receiver b, for receiving signal, and parses the interference signal of user a to obtain the data of user a by interference alignment
Information；
Wherein, the signal that each receiver is received includes desired signal and interference signal, after each emitter transmission signal,
The signal that corresponding receiver is received is referred to as desired signal, and the signal that other receivers are received is referred to as interference signal；
Wherein, a and b is numbering, and the processor of owning user, emitter, receiver are identical with Customs Assigned Number；
Wherein, K is the natural number more than 3.
It is 6. according to claim 5 to disturb alignment network system, it is characterised in that：
Receiver a, for receiving signal, and parses the desired signal of itself by interference alignment.
It is 7. according to claim 5 to disturb alignment network system, it is characterised in that：
The G receiver in addition to receiver a and receiver b in other K-2 receivers, for receiving signal, and by maximum
Change signal to noise ratio and parse the desired signal of itself；
And/or,
The K-2-G receiver in addition to receiver a and receiver b in other K-2 receivers, for receiving signal, and passes through
Interference alignment parses the desired signal of itself；
Wherein, G is the natural number less than K-2.
8. it is according to claim 7 to disturb alignment network system, it is characterised in that described in addition to receiver a and receiver b
G receiver in other K-2 receivers has used the formula (1) of the feasibility condition for obtaining data message method, with true
Determine the span of G, and then determine the minimum of a value of G from the span of fixed G：
(K-1)(M+N-2d)-G(N-d)≥d(K-1)(K-G) (1)
According to calculating formula (1), the span for obtaining G is as follows,
Wherein, M and N are respectively the number of antennas in the interference alignment network system on each emitter and each receiver, d
For the information data flow amount of each user's transmission, M, N, d are natural number.
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| CN102651661A (en) * | 2012-05-02 | 2012-08-29 | 西安交通大学 | Interference alignment method in time division-long term evolution (TD-LTE) system |
| US20160013848A1 (en) * | 2013-03-11 | 2016-01-14 | Telefonaktiebolaget L M Ericsson (Publ) | Method in a network node and a network node for controlling communication between a radio base station and user equipments in a wireless communication system |
| EP3069500A1 (en) * | 2013-11-17 | 2016-09-21 | Ping Liang | Massive mimo multi-user beamforming and single channel full duplex for wireless networks |
| CN106169948A (en) * | 2015-05-22 | 2016-11-30 | 华硕电脑股份有限公司 | The method and apparatus performing reference signal transmission in a wireless communication system |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102651661A (en) * | 2012-05-02 | 2012-08-29 | 西安交通大学 | Interference alignment method in time division-long term evolution (TD-LTE) system |
| US20160013848A1 (en) * | 2013-03-11 | 2016-01-14 | Telefonaktiebolaget L M Ericsson (Publ) | Method in a network node and a network node for controlling communication between a radio base station and user equipments in a wireless communication system |
| EP3069500A1 (en) * | 2013-11-17 | 2016-09-21 | Ping Liang | Massive mimo multi-user beamforming and single channel full duplex for wireless networks |
| CN106169948A (en) * | 2015-05-22 | 2016-11-30 | 华硕电脑股份有限公司 | The method and apparatus performing reference signal transmission in a wireless communication system |
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