CN106656296B - Full duplex energy acquisition relays adaptive antenna and selects transmission method - Google Patents
Full duplex energy acquisition relays adaptive antenna and selects transmission method Download PDFInfo
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- CN106656296B CN106656296B CN201610634965.5A CN201610634965A CN106656296B CN 106656296 B CN106656296 B CN 106656296B CN 201610634965 A CN201610634965 A CN 201610634965A CN 106656296 B CN106656296 B CN 106656296B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
- H04B7/1555—Selecting relay station antenna mode, e.g. selecting omnidirectional -, directional beams, selecting polarizations
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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
- H04B7/0608—Antenna selection according to transmission parameters
- H04B7/061—Antenna selection according to transmission parameters using feedback from receiving side
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15564—Relay station antennae loop interference reduction
Abstract
Full duplex energy acquisition relaying adaptive antenna in the present invention selects transmission method, three optional schemes: scheme one are arranged in transmitting-receiving for relay antenna, first select one information source is made to reach maximum antenna to trunk channel gain from all antennas of relaying to be used to receive source signal, after select a root relay to forward information source information to the stay of two nights to the maximum antenna of stay of two nights channel gain in remaining antenna；The dual-mode antenna of scheme two, direct simultaneous selection relaying makes self-interference channel gain minimum；Scheme three, first an information source is selected to receive source signal to the maximum antenna of trunk channel gain in all antennas of relaying, then select one the smallest antenna of self-interference channel gain is made to forward information source information to the stay of two nights in remaining antenna, system can the calculating based on momentary rate three kinds of antenna selecting plans are adaptively switched, so that the transmission rate of system maximizes, which is suitable for some junction networks for being not easy to extensive wired energy supply.
Description
Technical field
The present invention relates to fields of communication technology, more particularly to a kind of relaying adaptive antenna selection of full duplex energy acquisition
Transmission method.
Background technique
With frequency, full duplex technology is considered the technology for effectively improving spectrum efficiency simultaneously, which is in the same object
The transmission that both direction signal is realized on channel is managed, i.e., by eliminating own transmission machine letter at the receiver for communicating duplexing node
Number interference, transmitter signal simultaneously, receive the homogenous frequency signal from another node, compare traditional time division duplex (TDD)
For frequency division duplex (FDD), with frequency, full duplex can be doubled spectrum efficiency simultaneously.Currently, with frequency while full duplex
Technology is increasingly becoming a new research hotspot of wireless communication field, and before tentatively having shown wide application
Scape.It can apply in cellular communication system, indoor Radio Communication System etc., in recent years, energy conservation in wireless networks is acquired
The research of technology has received widespread attention, for being not easy to use the junction network of wired energy supply, such as sensor network on a large scale
Network, traditional method are powered using battery, but cause the network operation higher cost in later period, need periodic replacement battery or
Person charges the battery.Wireless energy acquisition technique significantly extends the life cycle of multinode network, in consideration of it, for using energy
The research for measuring the cooperative relaying network of acquisition technique seems very necessary.
Summary of the invention
The purpose of the present invention is to provide a kind of full duplex energy acquisition relaying adaptive antennas to select transmission method, so that
Whole system can select the maximum scheme of rate to go to receive and send messages in several cases.
A kind of full duplex energy acquisition relaying adaptive antenna selection transmission method, is used for full duplex relaying network, wherein
Full duplex relaying network includes three information source, relaying and the stay of two nights nodes, and message transmitting procedure is passed at one between information source and the stay of two nights
Defeated time slot is completed, comprising the following steps:
1) information source and relaying pilot signal transmitted, by feedback channel relay obtain information source to relay, be relayed to the stay of two nights with
And the complete state information of self-interference channel, then information source broadcasts useful information to relaying, relays and receives signal in t moment
Expression formula is expressed as follows:
Wherein d1For information source to the distance of relaying, m indicates path-loss factor, h1,iFor information source to relaying channel parameter,
fi,jFor information source to relaying channel parameter, | xs|2=PsFor information source send signal power, | xr|2=PrThe letter sent for relaying
Number power, nrFor unit variance additive white Gaussian noise, wherein i indicates i-th, relaying for receiving the antenna of signal, and j is indicated
Relaying jth root is used to send the antenna of signal；
2) energy of relaying acquisition receives noise institute with micro- ignoring acquisition antenna for forwarding the information of information source to the stay of two nights
When weak energy, the gross energy of relay reception information source transmission signal is in time TIn
After using energy acquisition technology, i.e. relaying will partially receive energy included in signal to acquire and to relay work energy supply,
Since wireless energy acquisition is there are transformation efficiency, relay actual acquisition to energy be
Wherein η indicates the energy conversion efficiency factor, and ρ indicates power allocation factor, and 0 < ρ < 1,0 < η < 1, when a part of signal is used for
After energy acquisition, under the operating mode of full duplex, the transmission power of relaying is relaying
3) information of relay forwarding information source can be expressed as to the stay of two nights, the stay of two nights in the signal that t moment receivesWherein d2To be relayed to the distance between stay of two nights, h2,jIndicate channel system between relaying and the stay of two nights
Number, ndFor unit variance white Gauss noise；
4) receiving end signal-to-noise ratio corresponding to 3 kinds of relay antenna transmitting-receiving schemes below system-computed: antenna receives and dispatches scheme 1,
It first selects an information source to receive signal to the maximum antenna of trunk channel gain in all antennas of relaying, selects formula are as follows:Then select a root relay to the maximum antenna forwarding of stay of two nights channel gain in remaining antenna
Information selects formula are as follows:Antenna receives and dispatches scheme 2, and the dual-mode antenna for directly selecting relaying makes certainly
Interference channel gain is minimum, selects formula are as follows:Antenna receives and dispatches scheme 3, first in relaying
It selects an information source to receive signal to the maximum antenna of trunk channel gain in all antennas, selects formula are as follows:Then one is selected to make the smallest antenna forwarding of self-interference channel gain in remaining antenna
Information selects formula are as follows:Total received signal to noise ratio from information source to the stay of two nights isWherein n=1,2,3, antenna transmitting-receiving scheme 1 is respectively represented, antenna is received
Originating party case 2, antenna receive and dispatch scheme 3；
5) after calculating receiving end signal-to-noise ratio corresponding to three kinds of antenna transmitting-receiving schemes, pass through formula C=log2(1+
γn,AF) system momentary rate corresponding to three kinds of antenna transmitting-receiving schemes, instantaneous speed of the system according to three kinds of schemes is calculated
Rate carries out the adaptive switching of relay antenna transmitting-receiving scheme, i.e.,Antenna receives and dispatches oneself of scheme
Adaptation switching obtains system transfer rate and reaches maximum.
In the preferred embodiment, in step 2), relaying is using variable gain amplification forwarding agreement, can
Under variable-gain amplification forwarding agreement, amplification factor is relayedRelaying is in t
The signal of moment forwarding information source can be expressed asWherein τ indicates the time delay factor.
Full duplex energy acquisition relaying adaptive antenna in the present invention selects transmission method, for the transmitting-receiving of relay antenna
Three optional schemes: scheme one are set, first selects one from all antennas of relaying and makes information source to trunk channel gain
Reach maximum antenna be used to receive source signal, then selected in remaining antenna a root relay to stay of two nights channel gain most
Big antenna forwarding information source information is to the stay of two nights；The dual-mode antenna of scheme two, direct simultaneous selection relaying increases self-interference channel
It is beneficial minimum.Scheme three first selects an information source to receive to the maximum antenna of trunk channel gain in all antennas of relaying
Then source signal selects one the smallest antenna forwarding information source information of self-interference channel gain is arrived in remaining antenna
The stay of two nights, the calculating based on system momentary rate adaptively switch three kinds of antenna selecting plans, so that the transmission speed of system
Rate maximizes, and transmission method relaying uses radio signal power and distributes energy acquisition technology, is not easy to greatly suitable for some
The junction network of the wired energy supply of scale, such as sensor network.
Detailed description of the invention
Fig. 1 (a) is the full duplex energy acquisition relaying adaptive antenna selection communications system transmission process in the present invention
Figure；
Fig. 1 (b) is the power point of the full duplex energy acquisition relaying adaptive antenna selection transmission method in the present invention
With block diagram；
Fig. 2 is the two-dimensional topology figure under the junction network simulated environment in the present invention；
Fig. 3 be in the present invention system Mean Speed with information source send power PSWhen increase three kinds of antenna selecting plans and from
Adapt to the situation of change of antenna selecting plan；
Fig. 4 is the situation of change of three kinds of schemes when system Mean Speed increases with power allocation factor ρ.
Specific embodiment
Following further describes the present invention with reference to the drawings,
It include three nodes, respectively information source S, relaying R and stay of two nights D, full duplex in Fig. 1 (a) referring to Fig. 1 (a) and 1 (b)
Relaying freely configures several antennas for sending and receiving signal, other nodes are single antenna, and relaying is passive bus,
Need to by wireless energy acquire be its work energize, due between information source and the stay of two nights distance farther out, without direct path.Relaying is complete
The a part for receiving information is used for energy acquisition by duplex mode of operation, relaying, and acquisition gained energy is for forwarding another part
Information, and relaying eliminates self-interference signal using interference self-cancellation technology, all channels are all made of Rayleigh and decline in system
Channel is fallen, message transmitting procedure is completed in a transmission time slot between information source and the stay of two nights, comprising the following steps:
1) information source and relaying pilot signal transmitted, by feedback channel relay obtain information source to relay, be relayed to the stay of two nights with
And the complete state information of self-interference channel.Then information source broadcasts useful information to relaying, relays and receives signal in t moment
Expression formula is expressed as follows:
Wherein d1For information source to the distance of relaying, m indicates path-loss factor, h1,iFor information source to relaying channel parameter,
fi,jFor information source to relaying channel parameter, | xs|2=PsFor information source send signal power, | xr|2=PrThe letter sent for relaying
Number power, nrFor unit variance additive white Gaussian noise, wherein i indicates i-th, relaying for receiving the antenna of signal, and j is indicated
Relaying jth root is used to send the antenna of signal；
2) energy of relaying acquisition receives noise institute with micro- ignoring acquisition antenna for forwarding the information of information source to the stay of two nights
When weak energy, the gross energy of relay reception information source transmission signal is in time TIn
After using energy acquisition technology, i.e. relaying will partially receive energy included in signal to acquire and to relay work energy supply,
Since wireless energy acquisition is there are transformation efficiency, relay actual acquisition to energy beWherein η indicates the energy conversion efficiency factor, and ρ indicates power allocation factor, and
0 < ρ < 1,0 < η < 1, after a part of signal is used for energy acquisition, relaying is under the operating mode of full duplex, the hair of relaying
The power is sent to be
3) information of relay forwarding information source can be expressed as to the stay of two nights, the stay of two nights in the signal that t moment receivesWherein d2To be relayed to the distance between stay of two nights, h2,jIndicate channel system between relaying and the stay of two nights
Number, ndFor unit variance white Gauss noise；
4) receiving end signal-to-noise ratio corresponding to 3 kinds of relay antenna transmitting-receiving schemes below system-computed: antenna receives and dispatches scheme 1,
It first selects an information source to receive signal to the maximum antenna of trunk channel gain in all antennas of relaying, selects formula are as follows:Then select a root relay to the maximum antenna forwarding of stay of two nights channel gain in remaining antenna
Information selects formula are as follows:Antenna receives and dispatches scheme 2, and the dual-mode antenna for directly selecting relaying makes certainly
Interference channel gain is minimum, selects formula are as follows:Antenna receives and dispatches scheme 3, first in relaying
It selects an information source to receive signal to the maximum antenna of trunk channel gain in all antennas, selects formula are as follows:Then one is selected to make the smallest antenna forwarding of self-interference channel gain in remaining antenna
Information selects formula are as follows:Total received signal to noise ratio from information source to the stay of two nights isWherein n=1,2,3, antenna transmitting-receiving scheme 1 is respectively represented, antenna is received
Originating party case 2, antenna receive and dispatch scheme 3；
5) after calculating receiving end signal-to-noise ratio corresponding to three kinds of antenna transmitting-receiving schemes, pass through formula C=log2(1+
γn,AF) system momentary rate corresponding to three kinds of antenna transmitting-receiving schemes, instantaneous speed of the system according to three kinds of schemes is calculated
Rate carries out the adaptive switching of relay antenna transmitting-receiving scheme, i.e.,Antenna receives and dispatches oneself of scheme
Adaptation switching obtains system transfer rate and reaches maximum.
In step 2), relay using variable gain amplification forwarding agreement, under variable gain amplification forwarding agreement, in
After amplification factorIt relays and forwards the signal of information source can be with table in t moment
It is shown asWherein τ indicates the time delay factor.
Fig. 2 is under the junction network simulated environment in the present invention 1 × 1 two-dimensional topology figure.Wherein, information source be located at point (0,
0), relaying is located at point (0.5,0), and the stay of two nights is located at point (1,0), and Fig. 3 is system Mean Speed with information source transmission power PSWhen increase
The situation of change of three kinds of schemes and adaptive antenna selection scheme.Simulated environment: power allocation factor ρ=0.4, channel fading
Coefficient m=3, energy conversion efficiency η=0.6, antenna number 6, relaying self-interference channel average channel gain E (| fi,j|2)=
0.1, other channel average channel gains are that 1, Fig. 4 is three kinds of schemes when system Mean Speed increases with power allocation factor ρ
Situation of change.Simulated environment: information source sends power Ps=10dB, channel fading coefficient m=3, energy conversion efficiency η=0.6,
Antenna number is 6, relaying self-interference channel average channel gain E (| fi,j|2)=0.1, other channel average channel gains are 1,
As can be seen from figs. 3 and 4 adaptive antenna selection scheme enables to the transmission rate of system to maximize.
In conclusion full duplex energy acquisition relaying adaptive antenna selection transmission method is directed to the transmitting-receiving of relay antenna
Three optional schemes: scheme one are set, first selects one from all antennas of relaying and makes information source to trunk channel gain
Reach maximum antenna be used to receive source signal, then selected in remaining antenna a root relay to stay of two nights channel gain most
Big antenna forwarding information source information is to the stay of two nights；The dual-mode antenna of scheme two, direct simultaneous selection relaying increases self-interference channel
It is beneficial minimum.Scheme three first selects an information source to receive to the maximum antenna of trunk channel gain in all antennas of relaying
Then source signal selects one the smallest antenna forwarding information source information of self-interference channel gain is arrived in remaining antenna
The stay of two nights, the calculating based on system momentary rate adaptively switch three kinds of antenna selecting plans, so that the transmission speed of system
Rate maximizes, and transmission method relaying uses radio signal power and distributes energy acquisition technology, is not easy to greatly suitable for some
The junction network of the wired energy supply of scale, such as sensor network.
It above are only a specific embodiment of the invention, but the design concept of the present invention is not limited to this, all utilizations
This design makes a non-material change to the present invention, and should all belong to behavior that violates the scope of protection of the present invention.
Claims (2)
1. a kind of full duplex energy acquisition relaying adaptive antenna selects transmission method, it is used for full duplex relaying network, wherein entirely
Duplexing junction network includes three information source, relaying and the stay of two nights nodes, it is characterised in that: message transmitting procedure between information source and the stay of two nights
It is completed in a transmission time slot, comprising the following steps:
1) information source and relaying pilot signal transmitted, by feedback channel relay obtain information source to relaying, be relayed to the stay of two nights and certainly
The complete state information of interference channel, then information source broadcasts useful information to relaying, relays and receives the expression of signal in t moment
Formula is expressed as follows:
Wherein d1For information source to the distance of relaying, m indicates path-loss factor, h1,iFor information source to the channel parameter of relaying, fi,jFor
The channel parameter of information source extremely relaying, | xs|2=PsFor information source send signal power, | xr|2=PrThe signal function sent for relaying
Rate, nrFor unit variance additive white Gaussian noise, wherein i indicates i-th, relaying for receiving the antenna of signal, and j indicates relaying
Jth root is used to send the antenna of signal；
2) energy of relaying acquisition receives noise institute with faint energy ignoring acquisition antenna for forwarding the information of information source to the stay of two nights
When amount, the gross energy of relay reception information source transmission signal is in time TRelaying is adopted
With energy acquisition technology, i.e. relaying will partially receive energy included in signal to acquire and to relay work energy supply, due to
Wireless energy acquisition there are transformation efficiency, relay actual acquisition to energy be
Wherein η indicates the energy conversion efficiency factor, and ρ indicates power allocation factor, and 0 < ρ < 1,0 < η < 1, when a part of signal is used for
After energy acquisition, under the operating mode of full duplex, the transmission power of relaying is relaying
3) information of relay forwarding information source can be expressed as to the stay of two nights, the stay of two nights in the signal that t moment receivesWherein d2To be relayed to the distance between stay of two nights, h2,jIndicate channel system between relaying and the stay of two nights
Number, ndFor unit variance white Gauss noise；
4) receiving end signal-to-noise ratio corresponding to 3 kinds of relay antenna transmitting-receiving schemes below system-computed: antenna receives and dispatches scheme 1, first exists
A piece information source of selection receives signal to the maximum antenna of trunk channel gain in all antennas of relaying, selects formula are as follows:Then select a root relay to the maximum antenna forwarding of stay of two nights channel gain in remaining antenna
Information selects formula are as follows:Antenna receives and dispatches scheme 2, and the dual-mode antenna for directly selecting relaying makes certainly
Interference channel gain is minimum, selects formula are as follows:Antenna receives and dispatches scheme 3, first in relaying
It selects an information source to receive signal to the maximum antenna of trunk channel gain in all antennas, selects formula are as follows:Then one is selected to make the smallest antenna forwarding of self-interference channel gain in remaining antenna
Information selects formula are as follows:Total received signal to noise ratio from information source to the stay of two nights isWherein n=1,2,3, antenna transmitting-receiving scheme 1 is respectively represented, antenna is received
Originating party case 2, antenna receive and dispatch scheme 3；
5) after calculating receiving end signal-to-noise ratio corresponding to three kinds of antenna transmitting-receiving schemes, pass through formula C=log2(1+γn,AF) meter
Calculation obtains system momentary rate corresponding to three kinds of antenna transmitting-receiving schemes, and system is relayed according to the momentary rate of three kinds of schemes
Antenna receives and dispatches the adaptive switching of scheme, i.e.,Antenna transmitting-receiving scheme adaptively switches
Reach maximum to system transfer rate.
2. full duplex energy acquisition relaying adaptive antenna according to claim 1 selects transmission method, it is characterised in that:
In step 2), relay using variable gain amplification forwarding agreement, under variable gain amplification forwarding agreement, relaying amplification because
SonThe signal relayed in t moment forwarding information source can be expressed asWherein τ indicates the time delay factor.
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| CN108512579B (en) * | 2018-03-14 | 2021-02-05 | 广西师范大学 | Antenna selection method based on EH-MIMO communication system |
| CN109639328A (en) * | 2018-12-07 | 2019-04-16 | 贵州航天计量测试技术研究院 | A kind of power distribution system and method for combined relaying and day line options |
| CN109474297B (en) * | 2018-12-28 | 2020-07-14 | 华侨大学 | Full-duplex information and energy simultaneous transmission antenna mode switching transceiver and transceiving method |
| CN111757332B (en) * | 2019-03-29 | 2023-05-05 | 中国移动通信有限公司研究院 | Network coverage optimizing equipment and gain control method thereof |
| CN110190886B (en) * | 2019-04-25 | 2020-10-16 | 中山大学 | Signal processing method and device of relay system, storage medium and relay system |
| CN111314920B (en) * | 2020-02-11 | 2023-05-30 | 华侨大学 | Untrusted relay network system and safe transmission method thereof |
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