CN111385004A - Same-frequency simultaneous full-duplex communication system and method based on spatial modulation - Google Patents
Same-frequency simultaneous full-duplex communication system and method based on spatial modulation Download PDFInfo
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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
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0602—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using antenna switching
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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
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/143—Two-way operation using the same type of signal, i.e. duplex for modulated signals
Abstract
The invention discloses a same-frequency simultaneous full-duplex communication system and a communication method based on spatial modulation. The method divides the sending information stream into the antenna selection information stream and the constellation modulation information stream by using the spatial modulation technology, the antenna selection information transmits one part of sending information, and the transmitting symbol obtained after constellation modulation transmits the other part of sending information, thereby improving the spatial multiplexing gain of the communication system; precoding vectors are obtained through a self-interference channel matrix, a transmitting symbol is multiplied by the precoding vectors, and elimination is carried out on a receiving antenna, so that the part of the antenna can be used for receiving co-frequency simultaneous signals from another communication node, and a co-frequency simultaneous full-duplex communication mode is realized; the combination of the two approaches improves the spectral efficiency of the communication system.
Description
Technical Field
The invention belongs to the field of wireless communication, and particularly relates to a same-frequency simultaneous full-duplex communication system based on spatial modulation and a communication method thereof.
Background
A basic task of a wireless communication system is to realize information intercommunication between two communication nodes (a1 and a2), and the information transmission is divided into two directions: (1) from a1 to a2 and (2) from a2 to a 1. If a communication node adopts two antennas, one is used as a transmitting antenna, the other is used as a receiving antenna, and the communication node eliminates signals from the transmitting antenna in the signals of the receiving antennas, bidirectional communication can be realized in the same frequency and the same time slot, and the communication mode is called same-frequency simultaneous full duplex.
In the existing wireless communication system, it is generally considered that the same wireless device (such as a base station and a mobile terminal, etc.) cannot transmit and receive signals on the same frequency band at the same time, so that the wireless device can only operate in a half-duplex mode, which makes the spectrum resources not fully utilized. The wireless device using the same-frequency simultaneous full-duplex communication technology can simultaneously transmit and receive signals on the same frequency band, thereby doubling the frequency spectrum efficiency of communication and being beneficial to the design of utilizing an upper layer protocol.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a same-frequency simultaneous full-duplex communication system based on spatial modulation and a communication method thereof.
The invention aims to provide a same-frequency simultaneous full-duplex communication system based on spatial modulation and a communication method thereof.
The same-frequency simultaneous full-duplex communication system based on spatial modulation comprises M communication nodes, wherein each communication node transmits and receives information at the same frequency and time; the ith communication node includes: information source, serial-parallel conversion unit, antenna selection unit, constellation modulation unit, spatial modulation precoding unit, NiThe device comprises a root antenna, a channel estimation unit, a maximum likelihood detection unit, a transmission vector demodulation unit and an information combination unit; wherein, the source is connected to the serial-parallel conversion unit; the serial-parallel conversion unit is respectively connected to the antenna selection unit and the constellation modulation unit; the antenna selection unit and the constellation modulation unit are connected to the spatial modulation precoding unit; spatial modulation precoding unit concatenation NiA root antenna; n is a radical ofiThe root antenna is also respectively connected to the channel estimation unit and the maximum likelihood detection unit; channel estimationThe unit is connected to the maximum likelihood detection unit; the maximum likelihood detection unit, the emission vector demodulation unit and the information combination unit are connected in sequence; in the signal transmission process of the ith communication node, the information source sends a transmission information stream to the serial-parallel conversion unit; the serial-parallel conversion unit divides the transmission information stream into two parts, one part is the antenna selection information stream and is transmitted to the antenna selection unit, and the other part is the constellation modulation information stream and is transmitted to the constellation modulation unit; an antenna selection unit selects information streams from N according to the antennaiSelecting N from root antennaaiRoot as transmitting antenna, where 0<Nai<NiFrom another Ni-NaiSelecting N from root antennariThe root antenna is used as a receiving antenna to obtain antenna selection information, and the antenna selection information is sent to the spatial modulation pre-coding unit; meanwhile, the constellation modulation unit modulates the constellation modulation information stream in a planet seat to obtain a transmitting symbol and sends the transmitting symbol to the spatial modulation precoding unit; selected NaiRoot transmitting antenna and NriForming a self-interference channel between the receiving antennas, obtaining a self-interference channel matrix by a spatial modulation precoding unit according to antenna selection information, obtaining a standard orthogonal basis vector of a self-interference channel matrix null space by performing singular value decomposition on the self-interference channel matrix, selecting a column vector in the standard orthogonal basis vector of the self-interference channel matrix null space as a precoding vector, multiplying the precoding vector and a transmitting symbol to obtain a transmitting vector, and transmitting the transmitting vector to NiTransmitting antenna and selecting NaiTransmitting by a transmitting antenna; in the signal receiving process of the jth communication node, N of the jth communication nodejN in root antennarjReceiving a received signal by a receiving antenna, and transmitting the received signal to a channel estimation unit to obtain communication channel state information; transmitting the received signal and the communication channel state information to a maximum likelihood detection unit; the maximum likelihood detection unit obtains the estimation of the transmitting vector by receiving the signal and the communication channel state information, and transmits the estimation of the transmitting vector to the transmitting vector demodulation unit; the transmitted vector demodulation unit demodulates the estimate of the transmitted vector to obtain the estimate of the constellation modulation information stream and the estimate of the antenna selection information streamThey are transmitted to the information combining unit; the information combination unit combines the estimates of the constellation modulation information stream and the antenna selection information stream to obtain a received information stream, NiAnd NjAnd j is equal to or more than 2, i and j are equal to 1, … …, M is equal to or more than 2.
The transmission information stream from the source is a series of binary bit sequences to be transmitted to the opposite communication node.
Number of receiving antennas Nri＝min{Nai-1，Ni-NaiIn which N isiNumber of antennas of i-th communication node, NaiNumber of transmitting antennas for i-th communication node, NriThe number of receiving antennas of the ith communication node is 1, … …, and M is the number of communication nodes.
The invention also aims to provide a same-frequency simultaneous full-duplex communication method based on spatial modulation.
The invention relates to a same-frequency simultaneous full-duplex communication method based on spatial modulation, which comprises the following steps:
(a) signal transmission process of the ith communication node:
1) the information source sends a sending information stream to the serial-parallel conversion unit;
2) the serial-parallel conversion unit divides the transmission information stream into two parts, one part is the antenna selection information stream and is transmitted to the antenna selection unit, and the other part is the constellation modulation information stream and is transmitted to the constellation modulation unit;
3) an antenna selection unit selects information streams from N according to the antennaiSelecting N from root antennaaiRoot as transmitting antenna, select NrThe root antenna is used as a receiving antenna to obtain antenna selection information, and the antenna selection information is sent to the spatial modulation pre-coding unit; meanwhile, the constellation modulation unit modulates the constellation modulation information stream in a planet seat to obtain a transmitting symbol and sends the transmitting symbol to the spatial modulation precoding unit;
4) selected NaiRoot transmitting antenna and NriA self-interference channel is formed between the receiving antennas, the spatial modulation pre-coding unit obtains a self-interference channel matrix according to the antenna selection information and obtains the self-interference channel matrix through the self-interference channel matrixPerforming singular value decomposition on the matrix to obtain a standard orthogonal basis vector of a self-interference channel matrix null space, selecting one column vector in the standard orthogonal basis vector of the self-interference channel matrix null space as a precoding vector, and multiplying the precoding vector by a transmitting symbol to obtain a transmitting vector, wherein N is the sum of N and NiMore than or equal to 2, i is 1, … …, M is the number of communication nodes, and M is more than or equal to 2;
5) transmitting the vector to NiTransmitting antenna and selecting NaiTransmitting by a transmitting antenna;
(second) signal reception process of jth communication node:
1) n of jth communication nodejN in root antennarjThe receiving antenna receives the received signal and transmits the signal to the channel estimation unit to obtain the state information of the communication channel, NjThe number of the communication nodes is more than or equal to 2, j is 1, … …, M is the number of the communication nodes, and M is more than or equal to 2;
2) the receiving signal and the communication channel state information are transmitted to a maximum likelihood detection unit together, the maximum likelihood detection unit obtains the estimation of a transmitting vector through the receiving signal and the communication channel state information, and the estimation of the transmitting vector is transmitted to a transmitting vector demodulation unit;
3) the transmitting vector demodulation unit demodulates the estimation of the transmitting vector to obtain the estimation of the constellation modulation information flow and the estimation of the antenna selection information flow, and transmits the estimation of the constellation modulation information flow and the estimation of the antenna selection information flow to the information combination unit;
4) the information combination unit combines the estimation of the constellation modulation information stream and the estimation of the antenna selection information stream to obtain a receiving information stream.
In step 1) of the signal transmission process, the transmission information stream sent by the information source is a series of bit sequences to be transmitted to the opposite communication node.
In step 3) of the signal transmission process, the number of receiving antennas Nri＝min{Nai-1，Ni-NaiIn which N isiNumber of antennas of i-th communication node, NaiNumber of transmitting antennas for i-th communication node, NriThe number of receiving antennas of the ith communication node is 1, … …, M, M is the communication nodeThe number of dots.
In step 1) of the signal reception process, the number of receiving antennas Nrj＝min{Naj-1，Nj-NajIn which N isiNumber of antennas of i-th communication node, NajNumber of transmitting antennas for jth communication node, NrjThe j is 1, … …, and M is the number of communication nodes.
In step 4) of the signal transmission process, obtaining a precoding vector through a self-interference channel matrix, comprising the following steps:
a)Nairoot transmitting antenna pair NriThe self-interference channel matrix of the root receiving antenna is
Performing singular value decomposition on the self-interference channel matrix H to obtain H ═ U ∑ VTWherein U is Nri×NriUnitary matrix of order, U column vector being left singular vector of H, ∑ being Nri×NaiAn order non-negative real diagonal matrix; vTIs a transpose of V, V being Nai×NaiThe unitary matrix of the order, the column vector of V is the right singular vector of H;
b) the self-interference channel matrix H has a rank r, and r is less than or equal to N according to the rank of the matrix and the property of matrix dimensionaiThen Nai×NaiUnitary matrix of order
Wherein the r +1 th to the N th of the matrix VaiEach column vector is a standard orthogonal basis vector of a self-interference channel matrix null space;
c) selecting one of the orthonormal basis vectors from the null space of the interference channel matrix
As a precoding vector; the transmit symbol s is multiplied by the precoding vector to obtain a transmit vector of
The transmission vector enables the self-interference signal received by the receiving antenna of the self-communication node
In step 2) of the signal reception process, the maximum likelihood detection unit obtains an estimate of the transmit vector, comprising the steps of:
a) traversing all possible emission vectors, and calculating Euclidean distances, wherein the Euclidean distances are as follows: receiving signal l and N in opposite communication node estimated according to pilot frequencyaiRoot antenna to this communication node NrjChannel H' of root receiving antenna and any transmitting vector xkThe modulo square of the difference of the products of (a), i.e. | l-H' xk||2；
b) The transmit vector that minimizes the euclidean distance is selected as the estimate of the transmit vector.
The invention has the advantages that:
the method divides the sending information stream into the antenna selection information stream and the constellation modulation information stream by using the spatial modulation technology, the antenna selection information transmits one part of sending information, and the transmitting symbol obtained after constellation modulation transmits the other part of sending information, thereby improving the spatial multiplexing gain of the communication system; precoding vectors are obtained through a self-interference channel matrix, a transmitting symbol is multiplied by the precoding vectors, and elimination is carried out on a receiving antenna, so that the part of the antenna can be used for receiving co-frequency simultaneous signals from another communication node, and a co-frequency simultaneous full-duplex communication mode is realized; the combination of the two approaches improves the spectral efficiency of the communication system.
Drawings
Fig. 1 is a block diagram of a communication node according to an embodiment of the spatial modulation-based co-frequency simultaneous full-duplex communication system of the present invention;
fig. 2 is a schematic diagram of transmitted information streams of an embodiment of a spatial modulation based co-frequency simultaneous full duplex communication system of the present invention.
Detailed Description
The invention will be further elucidated by means of specific embodiments in the following with reference to the drawing.
As shown in fig. 1, the co-frequency simultaneous full-duplex communication system based on spatial modulation of the present embodiment includes a plurality of communication nodes, and each communication node transmits and receives information at the same frequency and time; the ith communication node includes: information source, serial-parallel conversion unit, antenna selection unit, constellation modulation unit, spatial modulation precoding unit, NiThe device comprises a root antenna, a maximum likelihood detection unit, a transmission vector demodulation unit and an information combination unit; wherein, the source is connected to the serial-parallel conversion unit; the serial-parallel conversion unit is respectively connected to the antenna selection unit and the constellation modulation unit; the antenna selection unit and the constellation modulation unit are connected to the spatial modulation precoding unit; spatial modulation precoding unit concatenation NiA root antenna; n is a radical ofiThe root antenna is also respectively connected to the channel estimation unit and the maximum likelihood detection unit; the channel estimation unit is connected to the maximum likelihood detection unit; the maximum likelihood detection unit, the emission vector demodulation unit and the information combination unit are connected in sequence.
As shown in fig. 2, the transmitted information stream passes through a serial-to-parallel conversion unit, each time having K bits as constellation modulation information stream, there are
And taking the bit as an antenna selection information stream for selecting a transmitting antenna, wherein K is the bit number carried by each transmitting symbol, and K is a natural number.
In the present embodiment, the first communication node a1 and the second communication node a2 each have 5 antennas, wherein the number N of transmitting antennas in the signal receiving process in each communication node in the signal transmitting processa2, the number of receiving antennas N in the signal receiving processr1 is ═ 1; the transmission process uses a modulation method of binary phase shift keying. One possible mapping table is as follows:
the same-frequency simultaneous full-duplex communication method based on spatial modulation of the embodiment comprises the following steps:
the signal transmitting process comprises the following steps:
1) and constructing a mapping table, and sending a transmission information stream to the serial-parallel conversion unit by the information source.
2) The serial-parallel conversion unit divides the transmission information stream into two parts, the first 3 bits of every 4 bits are used as antenna selection information stream and are transmitted to the antenna selection unit, the 4 th bit of every 4 bits is used as constellation modulation information stream, and the constellation modulation method of binary phase shift keying modulation is used for transmitting the constellation modulation information stream to the constellation modulation unit.
3) The antenna selection unit selects 2 antennas from 5 antennas as transmitting antennas and 1 antenna as a receiving antenna according to the antenna selection information flow and a mapping table, and sends the information of the used transmitting antennas and the used receiving antennas to the spatial modulation pre-coding unit; meanwhile, the constellation modulation unit carries out constellation modulation on the constellation modulation information stream according to the mapping table to obtain a transmitting symbol and sends the transmitting symbol to the spatial modulation precoding unit.
4) A self-interference channel is formed between the selected transmitting antenna and the selected receiving antenna, the spatial modulation precoding unit obtains a self-interference channel matrix according to the information of the used transmitting antenna and the used receiving antenna, and obtains a precoding vector through the self-interference channel matrix, and the precoding vector is multiplied by a transmitting symbol to obtain a transmitting vector:
a) the self-interference channel matrix of 2 transmitting antennas to 1 receiving antenna is H ∈ C1×2And performing singular value decomposition on the self-interference channel matrix H to obtain H ═ U ∑ VTWherein U is unitary matrix of 1 × 1 order, column vector of U is left singular vector of H, ∑ is diagonal matrix of nonnegative real number of 1 × 2 order, and VTIs the transposition of V, V is a unitary matrix of 2 × 2 order, and the column vector of V is the right singular vector of H;
b) the self-interference channel matrix H has a rank of 1 and the unitary matrix V can be written as V ═ V1，v2]Wherein the column vector V in the matrix V2The standard orthogonal basis vector of the self-interference channel matrix null space meets Hv2＝0；
c) Take the last column vector V of V2As a precoding vector; multiplying the transmission symbol by the precoding vector to obtain a transmission vector v2s，The transmission vector enables a receiving antenna of the self-communication node to receive a self-interference signal Hv2s＝0。
5) The transmitting vector is transmitted to the selected 2 transmitting antennas to be transmitted.
(II) signal receiving process:
1)1 receiving antenna receives and obtains receiving signal, transmits to the channel estimation unit, obtains the communication channel state information;
2) the receiving signal and the communication channel state information are transmitted to a maximum likelihood detection unit together, the maximum likelihood detection unit obtains the estimation of a transmitting vector through the receiving signal and the communication channel state information, and the estimation of the transmitting vector is transmitted to a transmitting vector demodulation unit;
3) the transmitting vector demodulation unit demodulates the estimation of the transmitting vector to obtain the estimation of the constellation modulation information flow and the estimation of the antenna selection information flow, and transmits the estimation of the constellation modulation information flow and the estimation of the antenna selection information flow to the information combination unit;
4) the information combination unit combines the estimation of the constellation modulation information stream and the estimation of the antenna selection information stream to obtain a receiving information stream.
Finally, it is noted that the disclosed embodiments are intended to aid in further understanding of the invention, but those skilled in the art will appreciate that: various substitutions and modifications are possible without departing from the spirit and scope of the invention and the appended claims. Therefore, the invention should not be limited to the embodiments disclosed, but the scope of the invention is defined by the appended claims.
Claims (9)
1. A co-frequency simultaneous full-duplex communication system based on spatial modulation is characterized in that the co-frequency simultaneous full-duplex communication system comprises M communication nodes, and each communication node transmits and receives information at the same frequency and time; the ith communication node includes: information source, serial-parallel conversion unit, antenna selection unit, constellation modulation unit, spatial modulation precoding unit, NiRoot antenna, channel estimation unit, maximum likelihood detection unit, transmission vector demodulation unit, and information combining unit(ii) a Wherein the source is connected to a serial-to-parallel conversion unit; the serial-parallel conversion unit is respectively connected to the antenna selection unit and the constellation modulation unit; the antenna selection unit and the constellation modulation unit are connected to the spatial modulation precoding unit; the spatial modulation precoding unit is connected with NiA root antenna; said N isiThe root antenna is also respectively connected to the channel estimation unit and the maximum likelihood detection unit; the channel estimation unit is connected to the maximum likelihood detection unit; the maximum likelihood detection unit, the emission vector demodulation unit and the information combination unit are connected in sequence; in the signal transmission process of the ith communication node, the information source sends a transmission information stream to the serial-parallel conversion unit; the serial-parallel conversion unit divides the transmission information stream into two parts, one part is the antenna selection information stream and is transmitted to the antenna selection unit, and the other part is the constellation modulation information stream and is transmitted to the constellation modulation unit; an antenna selection unit selects information streams from N according to the antennaiSelecting N from root antennaaiRoot as transmitting antenna, where 0<Nai<NiFrom another Ni-NaiSelecting N from root antennariThe root antenna is used as a receiving antenna to obtain antenna selection information, and the antenna selection information is sent to the spatial modulation pre-coding unit; meanwhile, the constellation modulation unit modulates the constellation modulation information stream in a planet seat to obtain a transmitting symbol and sends the transmitting symbol to the spatial modulation precoding unit; selected NaiRoot transmitting antenna and NriForming a self-interference channel between the receiving antennas, obtaining a self-interference channel matrix by a spatial modulation precoding unit according to antenna selection information, obtaining a standard orthogonal basis vector of a self-interference channel matrix null space by performing singular value decomposition on the self-interference channel matrix, selecting a column vector in the standard orthogonal basis vector of the self-interference channel matrix null space as a precoding vector, multiplying the precoding vector and a transmitting symbol to obtain a transmitting vector, and transmitting the transmitting vector to NiTransmitting antenna and selecting NaiTransmitting by a transmitting antenna; in the signal receiving process of the jth communication node, N of the jth communication nodejN in root antennarjThe received signal is received by the receiving antenna and transmitted to the channel estimation unit to obtain communicationChannel state information; transmitting the received signal and the communication channel state information to a maximum likelihood detection unit; the maximum likelihood detection unit obtains the estimation of the transmitting vector by receiving the signal and the communication channel state information, and transmits the estimation of the transmitting vector to the transmitting vector demodulation unit; the transmitting vector demodulation unit demodulates the estimation of the transmitting vector to obtain the estimation of the constellation modulation information flow and the estimation of the antenna selection information flow, and transmits the estimation of the constellation modulation information flow and the estimation of the antenna selection information flow to the information combination unit; the information combination unit combines the estimates of the constellation modulation information stream and the antenna selection information stream to obtain a received information stream, NiAnd NjAnd j is equal to or more than 2, i and j are equal to 1, … …, M is equal to or more than 2.
2. The same-frequency simultaneous full-duplex communication system according to claim 1, wherein the transmission information stream transmitted from the source is a series of binary bit sequences to be transmitted to the opposite communication node.
3. The same-frequency simultaneous full-duplex communication system according to claim 1, wherein the number of receiving antennas N is Nri＝min{Nai-1，Ni-NaiIn which N isiNumber of antennas of i-th communication node, NaiNumber of transmitting antennas for i-th communication node, NriThe number of receiving antennas of the ith communication node is 1, … …, and M is the number of communication nodes.
4. The same-frequency simultaneous full-duplex communication system according to claim 1, wherein the transmission information stream passes through serial-to-parallel conversion units each time there is
The bits are used as antenna selection information streams.
5. A same-frequency simultaneous full-duplex communication method based on spatial modulation is characterized by comprising the following steps:
(a) signal transmission process of the ith communication node:
1) the information source sends a sending information stream to the serial-parallel conversion unit;
2) the serial-parallel conversion unit divides the transmission information stream into two parts, one part is the antenna selection information stream and is transmitted to the antenna selection unit, and the other part is the constellation modulation information stream and is transmitted to the constellation modulation unit;
3) an antenna selection unit selects information streams from N according to the antennaiSelecting N from root antennaaiRoot as transmitting antenna, select NriThe root antenna is used as a receiving antenna to obtain antenna selection information, and the antenna selection information is sent to the spatial modulation pre-coding unit; meanwhile, the constellation modulation unit modulates the constellation modulation information stream in a planet seat to obtain a transmitting symbol and sends the transmitting symbol to the spatial modulation precoding unit;
4) selected NaiRoot transmitting antenna and NriForming a self-interference channel between receiving antennas, obtaining a self-interference channel matrix by a spatial modulation precoding unit according to antenna selection information, obtaining a standard orthogonal basis vector of a self-interference channel matrix null space by performing singular value decomposition on the self-interference channel matrix, selecting a column vector in the standard orthogonal basis vector of the self-interference channel matrix null space as a precoding vector, and multiplying the precoding vector and a transmitting symbol to obtain a transmitting vector, wherein N is the sum of N and NiMore than or equal to 2, i is 1, … …, M is the number of communication nodes, and M is more than or equal to 2;
5) transmitting the vector to NiTransmitting antenna and selecting NaiTransmitting by a transmitting antenna;
(second) signal reception process of jth communication node:
1) n of jth communication nodejN in root antennarjThe receiving antenna receives the received signal and transmits the signal to the channel estimation unit to obtain the state information of the communication channel, Nj≥2，j＝1,……,M；
2) The receiving signal and the communication channel state information are transmitted to a maximum likelihood detection unit together, the maximum likelihood detection unit obtains the estimation of a transmitting vector through the receiving signal and the communication channel state information, and the estimation of the transmitting vector is transmitted to a transmitting vector demodulation unit;
3) the transmitting vector demodulation unit demodulates the estimation of the transmitting vector to obtain the estimation of the constellation modulation information flow and the estimation of the antenna selection information flow, and transmits the estimation of the constellation modulation information flow and the estimation of the antenna selection information flow to the information combination unit;
4) the information combination unit combines the estimation of the constellation modulation information stream and the estimation of the antenna selection information stream to obtain a receiving information stream.
6. The same-frequency simultaneous full-duplex communication method according to claim 5, wherein in step 1) of the signal transmission process, the transmission information stream transmitted from the source is a series of bit sequences to be transmitted to the opposite communication node.
7. The same-frequency simultaneous full-duplex communication method according to claim 5, wherein in step 3) of the signal transmission process, the number of receiving antennas N isri＝min{Nai-1，Ni-NaiIn which N isiNumber of antennas of i-th communication node, NaiNumber of transmitting antennas for i-th communication node, NriThe number of receiving antennas of the ith communication node is 1, … …, and M is the number of communication nodes.
8. The same-frequency simultaneous full-duplex communication method according to claim 5, wherein in step 4) of the signal transmission process, the precoding vector is obtained by self-interference channel matrix, comprising the steps of:
a)Nairoot transmitting antenna pair NriThe self-interference channel matrix of the root receiving antenna is
Performing singular value decomposition on the self-interference channel matrix H to obtain H ═ U ∑ VTWherein U is Nri×NriUnitary matrix of order, U column vector being left singular vector of H, ∑ being Nri×NaiAn order non-negative real diagonal matrix; vTIs a transpose of V, V being Nai×NaiThe unitary matrix of the order, the column vector of V is the right singular vector of H;
b) the self-interference channel matrix H has a rank r, and r is less than or equal to N according to the rank of the matrix and the property of matrix dimensionaiThen Nai×NaiUnitary matrix of order
Wherein the r +1 th to the N th of the matrix VaiEach column vector is a standard orthogonal basis vector of a self-interference channel matrix null space;
c) selecting one of the orthonormal basis vectors from the null space of the interference channel matrix
As a precoding vector; the transmit symbol s is multiplied by the precoding vector to obtain a transmit vector of
The transmission vector enables the self-interference signal received by the receiving antenna of the self-communication node
9. The same-frequency simultaneous full-duplex communication method according to claim 5, wherein in step 2) of the signal reception process, the maximum likelihood detection unit obtains the estimate of the transmission vector, comprising the steps of:
a) traversing all possible emission vectors, and calculating Euclidean distances, wherein the Euclidean distances are as follows: receiving signal l and N in opposite communication node estimated according to pilot frequencyaiRoot antenna to this communication node NrjChannel H' of root receiving antenna and any transmitting vector xkThe modulo square of the difference of the products of (a), i.e. | l-H' xk||2；
b) The transmit vector that minimizes the euclidean distance is selected as the estimate of the transmit vector.
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|---|---|---|---|---|
| CN111901022A (en) * | 2020-07-28 | 2020-11-06 | 电子科技大学 | Signal transmitting and receiving method assisted by precoding |
| CN113206695A (en) * | 2021-05-07 | 2021-08-03 | 温州大学智能锁具研究院 | Index vector modulation method and device based on constellation diagram and antenna combination |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101378280A (en) * | 2007-08-30 | 2009-03-04 | 中兴通讯股份有限公司 | Multi-input multi-output system based on antenna selection and signal processing method thereof |
| CN102195757A (en) * | 2010-03-19 | 2011-09-21 | 华为技术有限公司 | Method and device for pre-coding and decoding in distributed multi-antenna system |
| CN103684564A (en) * | 2013-12-23 | 2014-03-26 | 北京大学 | Multi-antenna based co-frequency co-time duplex communication method and system |
| CN105634711A (en) * | 2016-01-25 | 2016-06-01 | 山东大学 | Channel state information obtaining method of separated massive antenna array full-duplex wireless communication system |
| US20160156453A1 (en) * | 2014-12-01 | 2016-06-02 | Institute For Information Industry | Wireless communication system and method including co-time co-frequency full duplex communications |
| CN107864495A (en) * | 2017-10-11 | 2018-03-30 | 华南理工大学 | A kind of large-scale distributed antenna system full duplex transmission disturbance restraining method |
| WO2018058322A1 (en) * | 2016-09-27 | 2018-04-05 | 华为技术有限公司 | Channel parameter estimation method and related apparatus |
| CN108173582A (en) * | 2017-11-30 | 2018-06-15 | 东南大学 | A kind of modulating method and system based on transmit-receive combination pattern |
-
2018
- 2018-12-27 CN CN201811608782.1A patent/CN111385004B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101378280A (en) * | 2007-08-30 | 2009-03-04 | 中兴通讯股份有限公司 | Multi-input multi-output system based on antenna selection and signal processing method thereof |
| CN102195757A (en) * | 2010-03-19 | 2011-09-21 | 华为技术有限公司 | Method and device for pre-coding and decoding in distributed multi-antenna system |
| CN103684564A (en) * | 2013-12-23 | 2014-03-26 | 北京大学 | Multi-antenna based co-frequency co-time duplex communication method and system |
| US20160156453A1 (en) * | 2014-12-01 | 2016-06-02 | Institute For Information Industry | Wireless communication system and method including co-time co-frequency full duplex communications |
| CN105634711A (en) * | 2016-01-25 | 2016-06-01 | 山东大学 | Channel state information obtaining method of separated massive antenna array full-duplex wireless communication system |
| WO2018058322A1 (en) * | 2016-09-27 | 2018-04-05 | 华为技术有限公司 | Channel parameter estimation method and related apparatus |
| CN107864495A (en) * | 2017-10-11 | 2018-03-30 | 华南理工大学 | A kind of large-scale distributed antenna system full duplex transmission disturbance restraining method |
| CN108173582A (en) * | 2017-11-30 | 2018-06-15 | 东南大学 | A kind of modulating method and system based on transmit-receive combination pattern |
Non-Patent Citations (5)
| Title |
|---|
| MENG MA 等: "A Networking Solution on Uplink Channel of Co-Frequency and Co-Time System", 《CHINA COMMUNICATIONS》 * |
| MENG MA 等: "Full-Duplex Single-RF MIMO with Coordinate-Interleaved Space-Time Coding", 《IEEE》 * |
| MENG MA 等: "Full-Duplex Wireless System in 60 GHz Band", 《IEEE》 * |
| MENG MA 等: "Spatial Modulated Full Duplex", 《IEEE》 * |
| 马猛 等: "同频同时全双工网络干扰分析及消除方法研究", 《电信网技术》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111901022A (en) * | 2020-07-28 | 2020-11-06 | 电子科技大学 | Signal transmitting and receiving method assisted by precoding |
| CN111901022B (en) * | 2020-07-28 | 2021-07-09 | 电子科技大学 | Signal transmitting and receiving method assisted by precoding |
| CN113206695A (en) * | 2021-05-07 | 2021-08-03 | 温州大学智能锁具研究院 | Index vector modulation method and device based on constellation diagram and antenna combination |
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