CN106656291B - Method for acquiring data information and interference alignment network system - Google Patents
Method for acquiring data information and interference alignment network system Download PDFInfo
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- CN106656291B CN106656291B CN201611248642.9A CN201611248642A CN106656291B CN 106656291 B CN106656291 B CN 106656291B CN 201611248642 A CN201611248642 A CN 201611248642A CN 106656291 B CN106656291 B CN 106656291B
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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
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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 method for acquiring data information, relates to the technical field of communication, and aims to align the data information of a network system user by acquiring interference. When data information of a user a is acquired, a processor calculates a pre-coding matrix and a decoding matrix of K user signals through an interference alignment algorithm; reconfiguring pre-coding matrixes and decoding matrixes of signals of other users except the user a according to the calculation result so that interference signals of other users except the user a are aligned with the expected signals of the user b in a second specified direction when the user b receives the signals, and the interference signals of the user a are placed in other directions different from the second specified direction; the transmitter transmits signals according to the reconfigured pre-coding matrix and the reconfigured decoding matrix; the receiver b receives the signal and analyzes the interference signal of the user a to obtain the data information of the user a. The technical scheme provided by the embodiment of the invention is suitable for the process of acquiring the user data information.
Description
[ technical field ] A method for producing a semiconductor device
The present invention relates to the field of communications technologies, and in particular, to a method for acquiring data information and an interference alignment network system.
[ background of the invention ]
At present, the national security department pays more attention to social security, and increasingly receives attention from the national security department to detect criminal cases by acquiring necessary information through the intelligence and complexity of a wireless communication network.
With the rapid development of wireless communication networks, more and more users are in the wireless communication networks, and the signal interference between users is more and more serious. The interference alignment technology is a technological means for effectively removing signal interference between users, which has just emerged in recent years. In a wireless communication network using interference alignment technology, interference between users is constrained to a specific subspace and then ideally eliminated, so that all nodes need to know global channel information of the whole network. Aiming at the characteristic of the interference alignment network, the information of some users can be obtained in the interference alignment network through cooperation among the users, and a method for obtaining the information is developed based on the information so as to assist the national security department and is imperative.
[ summary of the invention ]
In view of this, embodiments of the present invention provide a method for acquiring data information and an interference alignment network system, which can acquire data information of a user in the interference alignment network system, provide help for relevant national departments, and improve social security.
In one aspect, an embodiment of the present invention provides a method for acquiring data information, which is applicable to an interference alignment network system, and the method includes:
the interference alignment network system has K users and comprises processors, transmitters and receivers, wherein each user corresponds to one processor, one transmitter and one receiver,
when data information of a user a is acquired, K processors calculate pre-coding matrixes and decoding matrixes of K user signals through an interference alignment algorithm;
the K processors reconfigure a precoding matrix and a decoding matrix of signals of other users except the user a in the interference alignment network system according to the calculation result so that the user a aligns interference signals of the other users in a first specified direction when receiving the signals, places own expected signals in other directions different from the first specified direction, enables the user b to align the interference signals of the other users except the user a with own expected signals in a second specified direction when receiving the signals, and places the interference signals of the user a in other directions different from the second specified direction;
k transmitters transmit signals according to the pre-coding matrix and the decoding matrix of the user a signals and the re-configured pre-coding matrix and decoding matrix of other user signals except the user a;
the receiver b receives the signal and analyzes the interference signal of the user a through interference alignment to obtain the data information of the user a;
after each transmitter transmits a signal, the signal received by the corresponding receiver is called a desired signal, and the signals received by other receivers are called interference signals;
wherein, a and b are numbers, and the processor, the transmitter and the receiver of the user are the same as the user number;
wherein K is a natural number greater than 3.
In another aspect, an embodiment of the present invention provides an interference alignment network system:
the interference alignment network system has K users and comprises processors, transmitters and receivers, wherein each user corresponds to one processor, one transmitter and one receiver,
the K processors are used for calculating the pre-coding matrixes and the decoding matrixes of the K user signals through an interference alignment algorithm when the data information of the user a is acquired; reconfiguring pre-coding matrixes and decoding matrixes of signals of other users except the user a in the interference alignment network system according to the calculation result so that the user a aligns interference signals of the other users in a first specified direction when receiving the signals, places own expected signals in other directions different from the first specified direction, enables the user b to align the interference signals of the other users except the user a with the own expected signals in a second specified direction when receiving the signals, and places the interference signals of the user a in other directions different from the second specified direction;
k transmitters are used for transmitting signals according to the pre-coding matrix and the decoding matrix of the user a signals and the re-configured pre-coding matrix and decoding matrix of other user signals except the user a;
the receiver b is used for receiving signals and analyzing interference signals of the user a through interference alignment so as to acquire data information of the user a;
after each transmitter transmits a signal, the signal received by the corresponding receiver is called a desired signal, and the signals received by other receivers are called interference signals;
wherein, a and b are numbers, and the processor, the transmitter and the receiver of the user are the same as the user number;
wherein K is a natural number greater than 3.
The embodiment of the invention provides a method for acquiring data information and an interference alignment network system, aiming at the interactive characteristics of global channel information in an interference alignment network, the data information of a certain user in a wireless communication network is acquired by reconfiguring a pre-coding matrix and a decoding matrix of a user signal, and the method can be applied to relevant departments of the country to acquire necessary information, provides help for the relevant departments and improves social security.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
Fig. 1 is a flowchart of a method for acquiring data information according to an embodiment of the present invention;
FIG. 2 is a flow chart of another method for obtaining data information according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an implementation of obtaining data information according to an embodiment of the present invention;
FIG. 4 is a flow chart of another method for obtaining data information according to an embodiment of the present invention;
FIG. 5 is a flow chart of another method for obtaining data information according to an embodiment of the present invention;
FIG. 6 is a comparative graph of an experiment provided by an embodiment of the present invention;
FIG. 7 is a comparative graph of another test provided by an embodiment of the present invention;
FIG. 8 is a comparative graph of another test provided by an embodiment of the present invention;
FIG. 9 is a comparative graph of another test provided by an embodiment of the present invention;
fig. 10 is a block diagram of an interference alignment network system according to an embodiment of the present invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
The embodiment of the invention provides a method for acquiring data information, which is suitable for an interference alignment network system and is suitable for an information acquisition process.
The interference alignment network system is a micro-cellular network system comprising K users, wherein each user corresponds to one processor, one transmitter and one receiver, and K is a natural number greater than 3.
The processor refers to a module for completing the calculation of the signal matrix in the interference alignment network system.
The transmitter refers to a miniature radio transceiver station for information transmission between a small base station, i.e. a public mobile communication base station, and a mobile phone terminal through a mobile communication switching center in a certain radio coverage area.
The receiver refers to a user terminal, including a mobile phone, a computer, a PC, and other personal electronic devices capable of interacting with the base station.
As shown in fig. 1, the method includes:
101. when acquiring the data information of the user a, the K processors calculate the pre-coding matrix and the decoding matrix of the K user signals through an interference alignment algorithm.
Encoding is the process of converting information from one form or format to another, with predefined methods to convert the information, data, and data into defined electrical pulse signals. Decoding is the inverse of encoding. In the embodiment of the present invention, the precoding matrix refers to a matrix for precoding a user signal, and the decoding matrix refers to a matrix for decoding a user signal. In wireless communication, the coding and decoding technology is mature, each signal has a corresponding precoding matrix and a corresponding decoding matrix according to different requirements, and the interference alignment mode of analyzing an expected signal when a user receives the signal can be changed through the precoding matrix and the decoding matrix in the embodiment of the invention.
Wherein, a is a number, and the processor, the transmitter and the receiver of the user are the same as the user number.
102. And the K processors reconfigure the precoding matrix and the decoding matrix of the signals of the users except the user a in the interference alignment network system according to the calculation result so that the user a aligns the interference signals of the other users in a first specified direction when receiving the signals, places the expected signals of the user a in other directions different from the first specified direction, aligns the interference signals of the users except the user a with the expected signals of the user b in a second specified direction when receiving the signals, and places the interference signals of the user a in other directions different from the second specified direction.
After each transmitter transmits a signal, a signal received by a corresponding receiver is called a desired signal, and signals received by other receivers are called interference signals. The desired signal carries a useful signal of user data information. The interference signal is generated by mutual interference when the user transmits the desired signal, and the transmission quality of the desired signal of the user is affected.
Wherein b is a number.
Wherein the first and second designated directions each refer to a spatially arbitrary one direction.
103. And the K transmitters transmit signals according to the pre-coding matrix and the decoding matrix of the user a signals and the re-configured pre-coding matrix and decoding matrix of other user signals except the user a.
104. And the receiver b receives the signal and analyzes the interference signal of the user a through interference alignment to acquire the data information of the user a.
The embodiment of the invention provides a method for acquiring data information, aiming at the interactive characteristics of global channel information in an interference alignment network, the data information of a certain user in a wireless communication network is acquired by reconfiguring a pre-coding matrix and a decoding matrix of a user signal, and the method can be applied to relevant national departments to acquire necessary information, provides help for the relevant departments and improves social security.
Further, with reference to the foregoing method flow, another possible implementation manner of the embodiment of the present invention further provides a specific process for the user a to acquire a desired signal in the interference alignment network system, and after step 103, as shown in fig. 2, the method includes the following specific steps:
105. the receiver a receives the signal and resolves its own desired signal by interference alignment.
In step 105, after the receiver of user a receives the signal, the receiver analyzes the desired signal by interference alignment, and compared with before reconfiguring the precoding matrix and the decoding matrix of the user signal other than user a, the direction of the interference signal and the direction of the desired signal of user a do not change, so that the user b does not perceive the data information of user a obtained by user b.
As shown in fig. 3, a schematic diagram of an implementation of an embodiment of the present invention is given.
Further, in combination with the foregoing method flow, the embodiment of the present invention further provides a specific process for acquiring a desired signal of a user in the interference alignment network system by another user except for the user a and the user b.
In order to enable a user b to obtain data information of a user a without being aware of the user a, and reconfigure a precoding matrix and a decoding matrix of other users except the user a, the communication quality of some users is necessarily sacrificed, that is, some users in the interference alignment network system can still obtain their own desired signals through interference alignment, the communication quality is not affected, and some users cannot obtain their own desired signals through interference alignment, and the communication quality is degraded, based on this, after step 103, the embodiment of the present invention provides the following two specific implementation manners:
a first implementation, as shown in fig. 4, includes the following specific steps:
106. g receivers in the K-2 receivers except the receiver a and the receiver b receive signals and resolve the expected signals of the receivers by maximizing the signal-to-noise ratio.
Wherein, G is the number of users which can not obtain the self-expected signal through interference alignment and have reduced communication quality, and G is a natural number smaller than K-2.
Wherein, the signal-to-noise ratio refers to the ratio of the desired signal to the strength of the interference plus noise, and the desired signal with reduced quality can be analyzed by maximizing the signal-to-noise ratio.
The second implementation, as shown in fig. 5, includes the following specific steps:
107. and K-2-G receivers in the K-2 receivers except the receiver a and the receiver b receive signals and resolve the expected signals of the receivers by interference alignment.
Further, in combination with the foregoing method flow, a user b obtains data information of the user a without being aware of the user a, and it is desirable that the smaller the number G of users causing the decrease in communication quality, the better, in order to determine the minimum value of G, for the implementation of step 106, another possible implementation manner of the embodiment of the present invention further provides the following specific flow, using the formula (1) of the feasibility condition of the method for obtaining data information, to determine the value range of G, and further determine the minimum value of G from the determined value range of G:
(K-1)(M+N-2d)-G(N-d)≥d(K-1)(K-G) (1)
according to the calculation of the formula (1), the value range of G is obtained as follows:
wherein, M and N are the number of antennas on each transmitter and each receiver in the interference alignment network system, d is the number of information data streams transmitted by each user, and M, N, d are both natural numbers.
As can be seen from equation (2), when the value range of d is different, the minimum value of G is also different.
When d is M < N, G may take a value of 0 at minimum, that is, user b may obtain data information of user a without any sacrifice of communication quality of user a.
When d is less than min (M, N), G can take the minimum value
That is, the communication quality of a part of users needs to be sacrificed so that the user b can acquire the data information of the user a without being aware of the user a.
When d is N < M, G is positive infinity, i.e., it is necessary to sacrifice the communication quality of all other users to enable user b to acquire the data information of user a without being perceived by user a.
In order to better understand the beneficial effects of the technical scheme, the embodiment of the invention also provides the following specific implementation modes by combining the drawings and experimental results:
in an interference alignment network system with K-5 users, the number d of information data streams transmitted by each user is 2. And according to the feasibility condition M + N ≧ d (K +1) of interference alignment, making M + N equal to 12, wherein M and N are the number of antennas on the transmitter and the receiver of each user respectively. Assuming that the user 5 acquires the data information of the user 1, all channels are subject to rayleigh block fading, and ideal global channel information is known to each node.
Implementation mode one
In fig. 6, under the condition that the snr of the signals transmitted by the transmitter is different, the signal transmission rate of the user 1, the average signal transmission rate of other users, and the signal transmission rate of the user 5 are compared, and the number G of users whose communication quality is degraded is set to 2, and N is set to 6 or 7. From the experimental results, it is found that the signal transmission rates of the user 1 and the user 5 are higher when M is 6 and N is 6 than when M is 5 and N is 7, because when N is 7, this scheme becomes infeasible according to the feasibility condition in the formula (1), and at this time, the user 1 will also find that his data information is leaked. Therefore, under such conditions, N <7 should be guaranteed.
Second embodiment
In fig. 7, the interference leakage at each user receiver is compared for different N cases. From the experimental results, it is known that when 2 ≦ N ≦ 6 or N ≦ 10, the interference leakage of user 1, user 4, and user 5 is 0, which is consistent with the feasibility condition in equation (1). When N is 7 ≦ N ≦ 9, the interference leakage power (P) for these users is no longer 0, and therefore, this scheme also becomes infeasible.
EXAMPLE III
In fig. 8, in the case where N is different in value, the signal transmission rate of user 1, the average signal transmission rate of other users, and the signal transmission rate of user 5 are compared, and the signal-to-noise ratio is set to 40 dB. From the experimental results, it can be seen that when 2 ≦ N ≦ 6 or N ≦ 10, the information transmission rates of user 1 and user 4 approach 25bits/s/Hz, and decrease significantly in the range of 7 ≦ N ≦ 9, which is consistent with the conclusion of the feasibility condition in equation (1). The signal transmission rate of user 5 increases as N increases from 2 to 6, but decreases significantly in the range of 7 ≦ N ≦ 9. When N is 10, the information transmission rate of the user 5 is close to 25bits/s/Hz, which is consistent with the user 1 and the user 4. This is because the power of the user 5 to acquire data information becomes smaller as N increases. When N is 2, the signal transmission rate of the user 5 becomes 0, and therefore, this point is not feasible. By collating the above conclusions, this scheme is possible when either 3. ltoreq. N.ltoreq.6 or N.ltoreq.10.
Embodiment IV
In fig. 9, in the case of different N, the signal transmission rate of the user 5 is compared with the method for acquiring data information provided without the embodiment of the present invention. From the simulation result, when N is greater than or equal to 2 and less than or equal to 6, the signal transmission rate of the user 5 is much higher than the rate when the data information is not used when the method for acquiring data information provided by the embodiment of the present invention is used. When N is more than or equal to 9 and less than or equal to 10, the signal transmission rate of the user 5 is consistent when the method for acquiring the data information provided by the embodiment of the invention is adopted and not adopted. Wherein the signal-to-noise ratio in fig. 9 refers to the signal-to-noise ratio of the signal transmitted by the transmitter.
dB in the figures of the above four embodiments refers to decibel, and is a pure unit of count; Bits/s/Hz is Bits/sec/Hz and refers to the signal transmission rate unit.
An embodiment of the present invention provides an interference alignment network system, which is suitable for the above method process, where the interference alignment network system has K users, and includes a processor, a transmitter, and a receiver, and each user corresponds to one processor, one transmitter, and one receiver, as shown in fig. 10, the interference alignment network system includes:
k processors (1, 2, 3 … … K-1, K) for calculating precoding matrix and decoding matrix of K user signals by interference alignment algorithm when acquiring data information of user a; and according to the calculation result, reconfiguring the precoding matrix and the decoding matrix of the signals of the users except the user a in the interference alignment network system, so that the user a aligns the interference signals of the other users in a first specified direction when receiving the signals, places the expected signals of the user b in the other directions different from the first specified direction, aligns the interference signals of the users except the user a with the expected signals of the user b in a second specified direction when receiving the signals, and places the interference signals of the user a in the other directions different from the second specified direction.
And K transmitters (1, 2, 3 … … K-1, K) for transmitting signals according to the precoding matrix and the decoding matrix of the user a signals and the reconfigured precoding matrix and decoding matrix of the signals of other users except the user a.
And the receiver b is used for receiving the signals and analyzing the interference signals of the user a through interference alignment to acquire the data information of the user a.
After each transmitter transmits a signal, the signal received by the corresponding receiver is called a desired signal, and the signals received by other receivers are called interference signals.
Wherein, a and b are numbers, and the processor, the transmitter and the receiver of the user are the same as the user number.
Wherein K is a natural number greater than 3.
Optionally, the receiver a is configured to receive a signal and resolve an expected signal of the receiver a by interference alignment.
Optionally, G receivers in the K-2 receivers except the receiver a and the receiver b are used for receiving signals and resolving the own desired signal by maximizing the signal-to-noise ratio.
And/or the presence of a gas in the gas,
and K-2-G receivers in the K-2 receivers except the receiver a and the receiver b are used for receiving signals and analyzing the expected signals of the receivers by interference alignment.
Wherein G is a natural number less than K-2.
Optionally, the G receivers in the K-2 receivers except the receiver a and the receiver b use the formula (1) of the feasibility condition of the method for acquiring the data information to determine the value range of G, and further determine the minimum value of G from the determined value range of G:
(K-1)(M+N-2d)-G(N-d)≥d(K-1)(K-G) (1)
according to the calculation of the formula (1), the value range of G is obtained as follows:
wherein, M and N are the number of antennas on each transmitter and each receiver in the interference alignment network system, d is the number of information data streams transmitted by each user, and M, N, d are both natural numbers.
The embodiment of the invention provides an interference alignment network system, aiming at the interactive characteristics of global channel information in an interference alignment network, the data information of a certain user in a wireless communication network is obtained by reconfiguring a pre-coding matrix and a decoding matrix of a user signal, and the system can be applied to relevant national departments to obtain necessary information, provides help for the relevant departments and improves social security.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions in actual implementation, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) or a Processor (Processor) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. A method for obtaining data information, which is applicable to an interference alignment network system, wherein the interference alignment network system has K users, and includes a processor, a transmitter and a receiver, and each user corresponds to one processor, one transmitter and one receiver, and the method includes:
when data information of a user a is acquired, K processors calculate pre-coding matrixes and decoding matrixes of K user signals through an interference alignment algorithm;
the K processors reconfigure a precoding matrix and a decoding matrix of signals of other users except the user a in the interference alignment network system according to the calculation result so that the user a aligns interference signals of the other users in a first specified direction when receiving the signals, places own expected signals in other directions different from the first specified direction, enables the user b to align the interference signals of the other users except the user a with own expected signals in a second specified direction when receiving the signals, and places the interference signals of the user a in other directions different from the second specified direction;
k transmitters transmit signals according to the pre-coding matrix and the decoding matrix of the user a signals and the re-configured pre-coding matrix and decoding matrix of other user signals except the user a;
the receiver b receives the signal and analyzes the interference signal of the user a through interference alignment to obtain the data information of the user a;
after each transmitter transmits a signal, the signal received by the corresponding receiver is called a desired signal, and the signals received by other receivers are called interference signals;
wherein, a and b are numbers, and the processor, the transmitter and the receiver of the user are the same as the user number;
wherein K is a natural number greater than 3;
after the K transmitters transmit signals according to the precoding matrix and the decoding matrix of the user a signal and the reconfigured precoding matrix and decoding matrix of other user signals except for the user a, the method further includes:
the receiver a receives the signal and analyzes the desired signal of the receiver through interference alignment, and compared with the method before the precoding matrix and the decoding matrix of the signals of other users except the user a are reconfigured, the direction of the interference signal and the direction of the desired signal of the user a are not changed.
2. The method of claim 1, wherein after the K transmitters transmit signals according to the precoding matrix and the decoding matrix of the user a signal and the reconfigured precoding matrix and decoding matrix of the user signals other than the user a, the method further comprises:
g receivers in the K-2 receivers except the receiver a and the receiver b receive signals, and the expected signals of the receivers are analyzed by maximizing the signal-to-noise ratio;
and/or the presence of a gas in the gas,
receiving signals by K-2-G receivers in K-2 receivers except the receiver a and the receiver b, and analyzing an expected signal of the receiver by interference alignment;
wherein G is a natural number less than K-2.
3. The method according to claim 2, wherein G receivers among the K-2 receivers except the receiver a and the receiver b receive signals, and analyze their own desired signals by maximizing signal-to-noise ratio, and the formula (1) of feasibility conditions of the method for obtaining data information is used to determine the value range of G, and further determine the minimum value of G from the determined value range of G:
(K-1)(M+N-2d)-G(N-d)≥d(K-1)(K-G) (1)
according to the calculation of the formula (1), the value range of G is obtained as follows,
wherein, M and N are the number of antennas on each transmitter and each receiver in the interference alignment network system, d is the number of information data streams transmitted by each user, and M, N, d are both natural numbers.
4. An interference alignment network system, characterized by:
the interference alignment network system has K users and comprises processors, transmitters and receivers, wherein each user corresponds to one processor, one transmitter and one receiver,
the K processors are used for calculating the pre-coding matrixes and the decoding matrixes of the K user signals through an interference alignment algorithm when the data information of the user a is acquired; reconfiguring pre-coding matrixes and decoding matrixes of signals of other users except the user a in the interference alignment network system according to the calculation result so that the user a aligns interference signals of the other users in a first specified direction when receiving the signals, places own expected signals in other directions different from the first specified direction, enables the user b to align the interference signals of the other users except the user a with the own expected signals in a second specified direction when receiving the signals, and places the interference signals of the user a in other directions different from the second specified direction;
k transmitters are used for transmitting signals according to the pre-coding matrix and the decoding matrix of the user a signals and the re-configured pre-coding matrix and decoding matrix of other user signals except the user a;
the receiver b is used for receiving signals and analyzing interference signals of the user a through interference alignment so as to acquire data information of the user a;
after each transmitter transmits a signal, the signal received by the corresponding receiver is called a desired signal, and the signals received by other receivers are called interference signals;
wherein, a and b are numbers, and the processor, the transmitter and the receiver of the user are the same as the user number;
wherein K is a natural number greater than 3;
and the receiver a is used for receiving the signals and analyzing the desired signals of the receiver a by interference alignment, and compared with the situation before the precoding matrix and the decoding matrix of the signals of other users except the user a are reconfigured, the direction of the interference signals and the direction of the desired signals of the user a are not changed.
5. The interference alignment network system of claim 4, wherein:
g receivers in the K-2 receivers except the receiver a and the receiver b are used for receiving signals and resolving the own expected signals by maximizing the signal-to-noise ratio;
and/or the presence of a gas in the gas,
K-2-G receivers in the K-2 receivers except the receiver a and the receiver b are used for receiving signals and analyzing the expected signals of the receivers by interference alignment;
wherein G is a natural number less than K-2.
6. The interference alignment network system according to claim 5, wherein G receivers among the K-2 receivers except the receiver a and the receiver b use the formula (1) of the feasibility condition of the method for obtaining data information to determine the value range of G, and further determine the minimum value of G from the determined value range of G:
(K-1)(M+N-2d)-G(N-d)≥d(K-1)(K-G) (1)
according to the calculation of the formula (1), the value range of G is obtained as follows,
wherein, M and N are the number of antennas on each transmitter and each receiver in the interference alignment network system, d is the number of information data streams transmitted by each user, and M, N, d are both natural numbers.
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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 |
| 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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| 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 |
| 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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