CN109995413A - A kind of environment backscatter communication method of relaying auxiliary - Google Patents
A kind of environment backscatter communication method of relaying auxiliary Download PDFInfo
- Publication number
- CN109995413A CN109995413A CN201910370718.2A CN201910370718A CN109995413A CN 109995413 A CN109995413 A CN 109995413A CN 201910370718 A CN201910370718 A CN 201910370718A CN 109995413 A CN109995413 A CN 109995413A
- Authority
- CN
- China
- Prior art keywords
- signal
- node
- radio frequency
- information
- communication
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004891 communication Methods 0.000 title claims abstract description 122
- 238000000034 method Methods 0.000 title claims abstract description 35
- 230000008030 elimination Effects 0.000 claims abstract description 7
- 238000003379 elimination reaction Methods 0.000 claims abstract description 7
- 230000005540 biological transmission Effects 0.000 claims description 28
- 238000005562 fading Methods 0.000 claims description 5
- 239000004576 sand Substances 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000005457 optimization Methods 0.000 claims description 2
- 230000008054 signal transmission Effects 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 description 8
- 238000004088 simulation Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 239000003086 colorant Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
-
- 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
- H04B7/15507—Relay station based processing for cell extension or control of coverage area
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Radio Relay Systems (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a kind of environment backscatter communication methods of relaying auxiliary, it relays while radio frequency sending set and backscatter communication equipment being assisted to be communicated with respective intended receivers, here backscatter communication equipment is modulated in the information to the signal of radio frequency sending set of oneself, relaying decoding information by the way of serial interference elimination, and the information after decoding is transmitted to respective intelligence receiver by way of non-orthogonal multiple, and under the premise of guaranteeing the communication quality of radio frequency communication link, pass through the reflection coefficient of backscatter communication equipment and the power allocation factor of relaying of optimizing the environment, with this come the performance for backscatter communication of optimizing the environment.Compared with traditional decoding forward relay communication system, the environment backscatter communication method of the relaying auxiliary proposed in the present invention can be obviously improved the communication performance of system.
Description
Technical field
The invention belongs to wireless communication technology fields, and in particular to a kind of environment backscatter communication side of relaying auxiliary
Method.
Background technique
With the development of Internet of Things, the power supply of magnanimity node and communication issue are badly in need of solving, it is clear that traditional wired power supply
Mode is no longer appropriate for；Periodic replacement battery or to charge the battery be a kind of method, but to thousands of a nodes up to ten thousand
This is inconvenient for sensor network；Using solar powered unstable, the stable operation of system is influenced.Meanwhile tradition
Wireless communication technique need to send radiofrequency signal, it is big that there are power consumptions, problem at high cost.And environment backscattering (Ambient
Backscatter) technology solves these problems to a certain extent.
Environment backscatter technique is a kind of novel Radio Frequency Identification Technology, backscattering device (Backscatter
Device) information bit of transmission required for oneself can be modulated in the radiofrequency signal of ambient enviroment, such as WIFI signal,
Television tower signal, base station signal etc. realize the communication between its receiver.Environment backscatter technique in environment using having deposited
Radiofrequency signal as communicating unique power source, and communicate today of prosperity and development, this radiofrequency signal is almost nowhere
Do not exist, so the communication under any place between equipment almost may be implemented in the technology.In this process, environment backscattering
Equipment does not need special radio frequency sending set, can be to avoid the trouble of frequent replacement battery and charging, at low cost, power consumption
Few, application prospect is very wide, can further push the development of mobile Internet of Things, is a kind of communication technology of green.
In environment backscatter communication system, when the communication distance between backscattering device and its intelligence receiver compared with
When remote, communication can be interrupted, and for this problem, propose a kind of environment backscatter communication method of relaying auxiliary.
Summary of the invention
In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is that providing a kind of relaying auxiliary
Environment backscatter communication method, connect for solving when backscattering radio frequency sending set and backscattering device and relevant information
Communication distance between receipts machine farther out when, the problem of communication can be interrupted.Compared with the relayed communications technology of traditional decoding forwarding,
This method can significantly improve the handling capacity of entire communication system while guaranteeing conventional radio frequency link communication quality.
The invention adopts the following technical scheme:
A kind of environment backscatter communication method of relaying auxiliary, the environment backscatter communication network of setting relaying auxiliary
In include a radio frequency sending set, relaying, video receiver, backscattering device and its intelligence receiver, respectively with section
Point S, node R, node D, node C and node T are indicated；Relaying assist simultaneously radio frequency sending set and backscatter communication equipment and
Respective intended receivers carry out communication and complete channel estimation, and backscatter communication equipment modulates oneself information to radio-frequency transmissions
Source signal transmission is completed on the signal of machine；Relaying decoding information by the way of serial interference elimination, and by the letter after decoding
Breath is transmitted to respective intelligence receiver by way of non-orthogonal multiple and completes relay forwarding；And guaranteeing radio frequency communication link
Communication quality under the premise of, by the power distribution of the reflection coefficient of backscatter communication equipment of optimizing the environment and relaying because
Son, the performance for backscatter communication of optimizing the environment.
Specifically, channel estimation specifically:
Relay node R of the radio frequency sending set S first into communication network sends pilot frequency sequence, and relay node R utilizes pilot tone
Signal estimates direct link channel information h(S,R)With backscatter link channel h(S,C)·h(C,R), while relay node R transmission is led
Intelligence receiver T of the frequency sequence to video receiver D and backscattering device, video receiver D estimation channel letter
Cease h(R,D), the intelligence receiver T estimating channel information h of backscattering device(R,T)。
Specifically, source signal transmits specifically:
Radio frequency sending set S sends the radiofrequency signal for carrying data information and receives radio frequency letter to R, backscattering device C is relayed
Number, backscattering device C by the modulates information of transmission required for oneself to receiving in radiofrequency signal and backscattering is gone out,
The signal from radio frequency sending set S and backscattering device C is received at relay node R simultaneously, and two paths of signals is carried out
Decoding, the information of backscattering device C are attached in the radiofrequency signal of radio frequency sending set S transmission, and E-mail relay utilization serial interference disappears
Except technology decodes the signal s of radio frequency sending set and the signal c of backscattering device simultaneously.
Further in the signal y that relay node R is receivedrAre as follows:
Wherein, PsIndicate that the transmission power of radio frequency sending set, α indicate that path loss coefficient, s indicate that radio frequency sending set is sent
Information signal, and E | s |2}=1；C indicates that the information signal that backscattering device is sent, η indicate backscattering device
Backscattering coefficient；nrIndicate thermal noise,d(A,B)And h(A,B)Respectively indicate between equipment A and equipment B away from
From and multipath fading, A, B ∈ { S, D, R, C, T }, h here0Indicate backscatter link channel coefficients, h0=h(S,C)h(C,R)。
Further, Signal to Interference plus Noise Ratio (SINR) γ for decoded signal s that relay node R is receivedsrAre as follows:
In relay node R correct decoding signal s and after eliminating its influence, the signal-to-noise ratio γ about signal c is obtainedcrAre as follows:
。
Specifically, relay forwarding specifically:
The information s of relay node R forwarding radio frequency sending set gives radio-frequency information receiver D, while relay node R forwarding is reversed
Intelligence receiver T of the information c to backscattering device for scattering equipment, forwards by the way of non-orthogonal multiple, forwards respectively
Signal after decodingWithThe energy forwarding information of oneself is used to node D and node T, relay node R, transmission power is Pr,
Power allocation factor is respectively βsAnd βc, βs+βc=1, in power distribution, radio frequency sending set signal of communicationPriority be higher than
Backscatter communication signalPriority, set βs> βc, at the intelligence receiver of backscattering device, using serial dry
Disturb the information for eliminating and obtaining itself and being concerned about.
Further, the transmission signal x of relay node R are as follows:
The signal y received at node D or node Td(or t)Are as follows:
Wherein, ndIndicate the noise of node D,ntIndicate the noise of node T,
Node D only needs decoded signal s, node T then to need decoded signal c after first decoded signal s, at node D or node T
About the corresponding SINR γ of signal ssd(or st)Are as follows:
For node T, after decoding success signal s, signal-to-noise ratio corresponding to node T signal c of concern itself
Are as follows:
。
Further, for radio frequency communication link, occurring to interrupt includes: that relay node R is unable to correct decoding signal s；?
Relay node R can be to interrupt at node D after correct decoding signal s, the outage probability of radio frequency communication linkStatement is such as
Under:
Wherein, Indicate node A and node
The mean value of the channel power of B；A,B∈{S,R,C,D,T}；E1() indicates exponential integral function.
Further, for scatter communication link, at node R or the end T, be required to receive about signal s's
SINR is greater than decoding threshold γsJust continue decoded signal c, definitionRcIndicate the transmission rate of node C, scattering is logical
Believe the outage probability of link are as follows:
Wherein, k indicates to be not less than zero integer；Γ (α, x) indicates that incomplete gamma functions, ψ (z) indicate general western function,
Γ (z) is gamma function, Re (z) > 0；Indicate Mayer G-function.
Further, guarantee the communication quality of radio frequency communication linkOptimize the power distribution of reflection coefficient and relaying because
It is as follows to establish Optimized model for son:
0≤η≤1
βc+βs=1
0≤βc≤βs≤1
Ps≥0,Pr≥0。
Compared with prior art, the present invention at least has the advantages that
A kind of environment backscatter communication method of relaying auxiliary provided by the invention, relaying can forward radio frequency to send out simultaneously
The information for penetrating machine and environment backscattering device, solves environment backscattering device and its intelligence receiver can only closer distance
In range the problem of communication, from the point of view of simulation result, compared with traditional relay communications system, it can be seen that proposed in the present invention
Relaying auxiliary environment scatter communication method, the communication performance of system can be obviously improved.
Further, a further improvement of the present invention lies in that, channel estimation phase, radio frequency sending set S is first to communication network
Relay node R in network sends pilot frequency sequence, and relay node R estimates direct link channel information h using pilot signal(S,R)With it is anti-
To scattering link channel h(S,C)·h(C,R), while relay node R sends pilot frequency sequence and dissipates to video receiver D and reversely
The intelligence receiver T of jet device, video receiver D estimating channel information h(R,D), the intelligence receiver T of backscattering device
Estimating channel information h(R,T), so all equipment with receive capabilities all obtain necessary channel information, convenient for signal
Decoding processing.
Further, source signal transmits the stage, and radio frequency sending set S can send the radiofrequency signal for carrying data information in
After R, while backscattering device C can receive this radiofrequency signal, and backscattering device C is by the letter of transmission required for oneself
Breath, which is modulated to, to be received in radiofrequency signal and backscattering is gone out, and can be received at relay node R and be sent out from radio frequency simultaneously
The signal of machine S and backscattering device C are penetrated, and two paths of signals is decoded, considers that the complexity of decoding algorithm and environment are anti-
The radiofrequency signal that radio frequency sending set S is sent is attached to feature-backscattering device C information signal c of scatter communication itself
On s, so in the present invention, E-mail relay utilization successive interference cancellation techniques decode the signal s of radio frequency sending set simultaneously and reversely dissipate
The signal c of jet device.
Further, the relay forwarding stage receives in the information s of relay node R forwarding radio frequency sending set to radio-frequency information
While machine D, relay node R can also forward the information c of backscattering device to the intelligence receiver T of backscattering device,
Signal of the forwarding by the way of non-orthogonal multiple, after forwarding decodes respectivelyWithTo node D and node T, relay node R is used
The energy forwarding information of oneself, transmission power are Pr, power allocation factor is respectively βsAnd βc, βs+βc=1, in power distribution,
Consider the protection to original radio frequency communication link communication quality, setting signalPriority be higher than signalPriority, so
In the present invention, relay for forwarding the power accounting of radio frequency sending set signal to be greater than the function for forwarding backscattering device signal
Rate accounting, that is, βs> βc.At the intelligence receiver of backscattering device, itself is obtained using serial interference elimination and is concerned about
Information.
Further, because node C is to send information using the radiofrequency signal of node S, it should first ensure that radio frequency is logical
Believe the communication quality of linkUnder the premise of herein, the present invention passes through the power allocation factor of optimization reflection coefficient and relaying, so that
Scatter communication link can have best interruption communication performance.
In conclusion a kind of environment backscatter communication method of relaying auxiliary provided by the invention, in this method, relaying
The information that radio frequency sending set and environment backscattering device can be forwarded simultaneously, solves environment backscattering device and its information
The problem of receiver can only communicate within the scope of closer distance.From the point of view of simulation result, compared with traditional relay communications system, energy
The environment scatter communication method for enough finding out the relaying auxiliary proposed in the present invention, can be obviously improved the communication performance of system.
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
Detailed description of the invention
Fig. 1 is the illustraton of model of whole system in the present invention；
Fig. 2 is variation diagram of the outage probability with reflection coefficient；
Fig. 3 is outage probability with backscattering device to the variation diagram of relay node distance；
Fig. 4 be throughput of system with backscattering device to relay node distance variation diagram and the present invention with it is traditional
Decode the comparison of the throughput of system of forward relay communication system.
Specific embodiment
The present invention provides a kind of environment backscatter communication methods of relaying auxiliary, relay while assisting radio frequency sending set
It is communicated with backscatter communication equipment with respective intended receivers, the information that backscatter communication equipment modulates oneself arrives
On the signal of radio frequency sending set, relaying using serial interference elimination by the way of decoding information, and by the information after decoding pass through it is non-
The mode of orthogonal multiple access is transmitted to respective intelligence receiver, and under the premise of guaranteeing the communication quality of radio frequency communication link,
It is anti-to optimize the environment with this by the reflection coefficient of backscatter communication equipment and the power allocation factor of relaying of optimizing the environment
To the performance of scatter communication.Compared with traditional decoding forward relay communication system, the ring of the relaying auxiliary proposed in the present invention
Border backscatter communication method, can be obviously improved the communication performance of system.
It first include a radio frequency sending set, relaying, radio frequency in the environment backscatter communication network of setting relaying auxiliary
Signal receiver, backscattering device and its intelligence receiver use node S, node R, node D, node C and node T respectively
It indicates.h(A,B)It is the multipath fading between equipment A and equipment B, d(A,B)It is the distance between equipment A and equipment B, (A, B) ∈
{ S, R, D, C, T }, s are the information of radio frequency sending set, and c is the information of backscattering device.
Referring to Fig. 1, a kind of environment backscatter communication method of relaying auxiliary of the present invention, comprising the following steps:
S1, channel estimation phase；
Relay node R of the radio frequency sending set S first into communication network sends pilot frequency sequence, and relay node R can at this time
Direct link channel information h is estimated using pilot signal(S,R)With backscatter link channel h(S,C)·h(C,R), while relaying section
Point R can also send pilot frequency sequence to the intelligence receiver T of video receiver D and backscattering device, rf signal reception
Machine D being capable of estimating channel information h(R,D), the intelligence receiver T of backscattering device being capable of estimating channel information h(R,T)。
S2, source signal transmit the stage；
The radiofrequency signal that radio frequency sending set S sends carrying data information gives relaying R, while backscattering device C can be received
To radiofrequency signal, backscattering device C is by the modulates information of transmission required for oneself to receiving in radiofrequency signal and reversely dissipate
It is shot out, at relay node R, the two paths of signals from radio frequency sending set and backscattering device can be received simultaneously, and
The signal of two-way is decoded, itself feature-of the complexity and environment backscatter communication that consider decoding algorithm reversely dissipates
The information of jet device is attached in the radiofrequency signal of radio frequency sending set transmission, therefore, in the present invention, E-mail relay utilization serial interference
Technology for eliminating decodes the signal s of radio frequency sending set and the signal c of backscattering device simultaneously.
The signal y that relay node R is receivedrAre as follows:
Wherein, PsIndicate that the transmission power of radio frequency sending set, α indicate path loss coefficient；S indicates that radio frequency sending set is sent
Information signal, and E | s |2}=1；C indicates the information signal that backscattering device is sent；η indicates backscattering device
Backscattering coefficient；nrIndicate thermal noise,d(A,B)And h(A,B)Respectively indicate between equipment A and equipment B away from
From and multipath fading, A, B ∈ { S, D, R, C, T } here；h0Indicate backscatter link channel coefficients, h0=h(S,C)h(C,R)。
Signal to Interference plus Noise Ratio (SINR) γ for decoded signal s that relay node R is receivedsrAre as follows:
In relay node R correct decoding signal s and after eliminating its influence, the obtained signal-to-noise ratio γ about signal ccrAre as follows:
S3, relay forwarding stage；
The information s of relay node R forwarding radio frequency sending set gives radio-frequency information receiver D, while relay node R forwarding is reversed
The information c of equipment is scattered to the intelligence receiver T of backscattering device, in order to guarantee the communication quality of radio frequency link, forwarding is adopted
With the mode of non-orthogonal multiple, in power distribution, the protection to original radio communication two-way communication quality is considered, it always will be compared with
More power are used for the forwarding of radio-frequency transmissions machine information, at radio-frequency transmitter, using general receiver decoding information, and anti-
To at the intelligence receiver of scattering equipment, the information of itself care is obtained using serial interference elimination.
In the relay forwarding stage, relaying forwards the signal after decoding using non-orthogonal multiple mode respectivelyWithGive node D
With node T.In such a scenario, relay node R uses the energy forwarding information of oneself, and transmission power is Pr, power distribution because
Son is respectively βsAnd βc, βs+βc=1.
Because the communication priority of radio frequency sending set is higher than the priority of backscatter communication, set βs≥βc, then relay
The transmission signal x of node R are as follows:
The signal y received at node D (or node T)d(or t)Are as follows:
Wherein, ndIndicate the noise of node D,ntIndicate the noise of node T,
Because of the relationship of priority, node D is decoded after only needing decoded signal s, node T then to need first decoded signal s
Signal c, correspond ground, at node D (or node T) about the corresponding SINR γ of signal ssd(or st)Are as follows:
For node T, after decoding success signal s, signal-to-noise ratio corresponding to node T signal c of concern itself
(SNR) are as follows:
For radio frequency communication link (S- > R- > D), interruption occurs, and there are two types of possible:
One is relay node R to be unable to correct decoding signal s；
Second situation be relay node R can with correct decoding signal s after interrupted at node D.
So for radio frequency communication link, outage probabilityIt is expressed as follows:
Wherein, Indicate node A and node
The mean value of the channel power of B, A, B ∈ { S, R, C, D, T }；E1() indicates exponential integral function.
Similar with radio frequency communication link for scatter communication link (S- > C- > R- > D), communication, which occurs to interrupt, also wraps
Include two kinds of situations.Unlike, since relay node R and node T is required to carry out SIC detection, so at node R (or T)
End is required to the SINR about signal s received greater than decoding threshold γsDecoded signal c can just be continued.DefinitionWherein RcIndicate the transmission rate of node C.So from the angle being correctly decoded, available scatter communication
The outage probability of link are as follows:
Wherein, k indicates to be not less than zero integer；Γ (α, x) indicates that incomplete gamma functions, ψ (z) indicate general western function,
Γ (z) is gamma function, Re (z) > 0；Indicate Mayer G-function.
Because node C is to send information using the radiofrequency signal of node S, the logical of radio frequency communication link should first ensure that
Believe qualityUnder the premise of herein, by optimizing the power allocation factor of reflection coefficient and relaying, the scatter communication link enable has
Preferable communication performance, it is as follows to establish Optimized model:
0≤η≤1
βc+βs=1
0≤βc≤βs≤1
Ps≥0,Pr≥0。
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being described and shown in usually here in attached drawing is real
The component for applying example can be arranged and be designed by a variety of different configurations.Therefore, below to the present invention provided in the accompanying drawings
The detailed description of embodiment be not intended to limit the range of claimed invention, but be merely representative of of the invention selected
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without creative efforts
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Emulation experiment and effect analysis
Simulation parameter:
Radio frequency sending set sends power Ps=10dBm, relaying send power Pr=0dBm, the distance between communication equipment are
d(S,R)=10m, d(S,C)=12m, d(R,D)=10m, d(C,R)=5m, d(C,T)=10m, corresponding multipath fading obey Rayleigh
Decline, and | | h(A,B)||2, the mean value of (A, B) ∈ { S, D, C, R } is 1, reflection coefficient η=0.6 of backscattering device, path
Fissipation factor α=3, radio frequency sending set data rate Rs=1bit/s/Hz, backscattering device data rate Rc=1bit/s/
Hz, noise power
According to the Outage probability of distributed antenna curve of parameters simulation system proposed by the present invention, and with traditional relay wireless communications
System has carried out the comparison of handling capacity.
Referring to Fig. 2, indicating the relationship between reflection coefficient and the outage probability of system.Different colors indicates not in figure
The outage probability curve of same power partition coefficient.It can be seen from the figure that with the increase of reflection coefficient, radio frequency communication link
The probability interrupted increases, and the outage probability of scatter communication link is first reduced and is kept approximately constant afterwards.This is because reflection
Coefficient increases, so that the interference of scattering link pair radiofrequency signal increases, the outage probability of radio frequency communication link is caused to rise, and right
For scatter communication link, useful signal increases, so outage probability declines.And when reflection coefficient increases to certain value
When, because affecting the decoding of radiofrequency signal, the outage probability of scatter communication is no longer decreased obviously.
Referring to Fig. 3, give under different reflection coefficients, system break probability and backscattering node S and relaying
The relationship of distance between node R.Blue in figure, black and light gray respectively indicate reflection coefficient η=0.1, η=0.6 and η=1
When, correspondingly outage probability curve.From the figure, it can be seen that the outage probability of radio frequency communication link with node S to R away from
From increase and decline, this is because increase of the node S to node R distance, relay node R receive from node C's
The power of scattered signal reduces, and for radiofrequency signal, the interference being subject to is reduced, so its interruption performance declines.For dissipating
It penetrates for communication link, outage probability rises after falling before with the increase of the distance of node S to R, this is because with section
Being closer in range of point S to R increase apart from when, be conducive to the decoding of radiofrequency signal, to reduce scatter communication link
Interruption performance, when distance be more than certain value when, reach relaying available signal power reduce so that scatter communication link
The probability interrupted increases.
Referring to Fig. 4, giving when the message transmission rate of node S and the message transmission rate of node C are 2bit/s/
When Hz, the transmission power and system throughput magnitude relation of radio frequency sending set.Radio frequency communication link and scattering are logical as we can see from the figure
Believe that the handling capacity of link rises as the transmission power of radio frequency sending set increases.Meanwhile the relaying with traditional decoding forwarding
System is compared, and the environment backscatter communication system of relaying auxiliary proposed by the present invention has higher handling capacity, and this mentions
It rises, the influence for original relay communications system is very small.
The above content is merely illustrative of the invention's technical idea, and this does not limit the scope of protection of the present invention, all to press
According to technical idea proposed by the present invention, any changes made on the basis of the technical scheme each falls within claims of the present invention
Protection scope within.
Claims (10)
1. a kind of environment backscatter communication method of relaying auxiliary, which is characterized in that the environment of setting relaying auxiliary reversely dissipates
Penetrating includes a radio frequency sending set in communication network, relaying, video receiver, and backscattering device and its information receive
Machine, uses node S, node R respectively, and node D, node C and node T are indicated；It relays while assisting radio frequency sending set and reversely dissipate
It penetrates communication equipment to carry out communicating completion channel estimation with respective intended receivers, backscatter communication equipment modulates the letter of oneself
It ceases and completes source signal transmission on the signal of radio frequency sending set；Relaying decoding information by the way of serial interference elimination, and
Information after decoding is transmitted to respective intelligence receiver by way of non-orthogonal multiple and completes relay forwarding；And guaranteeing
Under the premise of the communication quality of radio frequency communication link, pass through the reflection coefficient and relaying of backscatter communication equipment of optimizing the environment
Power allocation factor, the performance for backscatter communication of optimizing the environment.
2. the method according to claim 1, wherein channel estimation specifically:
Relay node R of the radio frequency sending set S first into communication network sends pilot frequency sequence, and relay node R utilizes pilot signal
Estimate direct link channel information h(S,R)With backscatter link channel h(S,C)·h(C,R), while relay node R sends pilot tone sequence
Arrange the intelligence receiver T to video receiver D and backscattering device, video receiver D estimating channel information
h(R,D), the intelligence receiver T estimating channel information h of backscattering device(R,T)。
3. the method according to claim 1, wherein source signal transmits specifically:
Radio frequency sending set S sends the radiofrequency signal for carrying data information and receives radiofrequency signal to R, backscattering device C is relayed, instead
The modulates information of transmission required for oneself is being relayed to receiving in radiofrequency signal and backscattering is gone out to scattering equipment C
The signal from radio frequency sending set S and backscattering device C is received simultaneously at node R, and two paths of signals is decoded,
The information of backscattering device C is attached in the radiofrequency signal of radio frequency sending set S transmission, E-mail relay utilization successive interference cancellation techniques
The signal s of radio frequency sending set and the signal c of backscattering device are decoded simultaneously.
4. according to the method described in claim 3, it is characterized in that, the signal y that relay node R is receivedrAre as follows:
Wherein, PsIndicate that the transmission power of radio frequency sending set, α indicate that path loss coefficient, s indicate the letter that radio frequency sending set is sent
Information signal, and E | s |2}=1；C indicates that the information signal that backscattering device is sent, η indicate the reversed of backscattering device
Scattering coefficient；nrIndicate thermal noise,d(A,B)And h(A,B)Respectively indicate distance between equipment A and equipment B and
Multipath fading, here A, B ∈ { S, D, R, C, T }, h0Indicate backscatter link channel coefficients, h0=h(S,C)h(C,R)。
5. according to the method described in claim 3, it is characterized in that, the letter for decoded signal s that relay node R is received is done
It makes an uproar than (SINR) γsrAre as follows:
In relay node R correct decoding signal s and after eliminating its influence, the signal-to-noise ratio γ about signal c is obtainedcrAre as follows:
。
6. the method according to claim 1, wherein relay forwarding specifically:
The information s of relay node R forwarding radio frequency sending set gives radio-frequency information receiver D, while relay node R forwards backscattering
The information c of equipment is forwarded by the way of non-orthogonal multiple to the intelligence receiver T of backscattering device, respectively forwarding decoding
Signal afterwardsWithThe energy forwarding information of oneself is used to node D and node T, relay node R, transmission power is Pr, power
Distribution factor is respectively βsAnd βc, βs+βc=1, in power distribution, radio frequency sending set signal of communicationPriority be higher than it is reversed
Scatter communication signalPriority, set βs> βc, at the intelligence receiver of backscattering device, using serial interference elimination
Obtain the information of itself care.
7. according to the method described in claim 6, it is characterized in that, the transmission signal x of relay node R are as follows:
The signal y received at node D or node Td(or t)Are as follows:
Wherein, ndIndicate the noise of node D,ntIndicate the noise of node T,
Node D only needs decoded signal s, node T then to need decoded signal c after first decoded signal s, the pass at node D or node T
In the corresponding SINR γ of signal ssd(or st)Are as follows:
For node T, after decoding success signal s, signal-to-noise ratio corresponding to node T signal c of concern itself are as follows:
。
8. according to the method described in claim 6, it is characterized in that, occurring to interrupt includes: relaying section for radio frequency communication link
Point R is unable to correct decoding signal s；Relay node R can with correct decoding signal s after interrupted at node D, radio communication
The outage probability of linkIt is expressed as follows:
Wherein, Indicate the letter of node A and node B
The mean value of road power；A,B∈{S,R,C,D,T}；E1() indicates exponential integral function.
9. according to the method described in claim 6, it is characterized in that, at node R or the end T, being both needed to for scatter communication link
The SINR about signal s to be received is greater than decoding threshold γsJust continue decoded signal c, definitionRcIt indicates
The transmission rate of node C, the outage probability of scatter communication link are as follows:
Wherein, k indicates to be not less than zero integer；Γ (α, x) indicates that incomplete gamma functions, ψ (z) indicate general western function, Γ (z)
It is gamma function, Re (z) > 0；Indicate Mayer G-function.
10. according to the method described in claim 6, it is characterized in that, guaranteeing the communication quality of radio frequency communication linkOptimization is anti-
The power allocation factor for penetrating coefficient and relaying, it is as follows to establish Optimized model:
0≤η≤1
βc+βs=1
0≤βc≤βs≤1
Ps≥0,Pr≥0。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910370718.2A CN109995413B (en) | 2019-05-06 | 2019-05-06 | Relay-assisted environment backscattering communication method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910370718.2A CN109995413B (en) | 2019-05-06 | 2019-05-06 | Relay-assisted environment backscattering communication method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109995413A true CN109995413A (en) | 2019-07-09 |
| CN109995413B CN109995413B (en) | 2020-07-28 |
Family
ID=67135960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910370718.2A Expired - Fee Related CN109995413B (en) | 2019-05-06 | 2019-05-06 | Relay-assisted environment backscattering communication method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109995413B (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110225538A (en) * | 2019-06-21 | 2019-09-10 | 电子科技大学 | The non-orthogonal multiple access communications design method of reflecting surface auxiliary |
| CN110430566A (en) * | 2019-07-26 | 2019-11-08 | 西北工业大学 | A kind of more junction network safe transmission methods of double bounce based on collection of energy |
| CN110545128A (en) * | 2019-08-23 | 2019-12-06 | 东南大学 | Cooperative transmission optimization method in environment backscatter array communication system |
| CN111246493A (en) * | 2020-01-14 | 2020-06-05 | 东南大学 | Label-based relay method in environment backscatter communication |
| CN112039553A (en) * | 2020-08-19 | 2020-12-04 | 中国人民解放军国防科技大学 | Two-node opportunity mutual cooperation communication method and system based on environment backscattering |
| CN112087792A (en) * | 2020-08-07 | 2020-12-15 | 浙江工业大学 | Node-to-relay node communication method of backscattering-assisted wireless energy supply network |
| CN112202535A (en) * | 2020-09-14 | 2021-01-08 | 西安交通大学 | Multi-user symbiotic communication system and method based on backscattering |
| CN112469128A (en) * | 2020-11-27 | 2021-03-09 | 河南理工大学 | User maximum sum rate optimization method in environment backscattering access NOMA system |
| WO2021169586A1 (en) * | 2020-02-27 | 2021-09-02 | 华为技术有限公司 | Communication method and apparatus |
| CN113438706A (en) * | 2021-06-10 | 2021-09-24 | 中国石油大学(华东) | Multi-hop backhaul Com network energy optimization routing scheme |
| CN113726400A (en) * | 2021-09-02 | 2021-11-30 | 成都航空职业技术学院 | Multifunctional electronic system for wireless communication and communication method |
| US11763106B2 (en) | 2018-06-05 | 2023-09-19 | The Research Foundation For The State University Of New York | Method for passive wireless channel estimation in radio frequency network and apparatus for same |
| WO2023185963A1 (en) * | 2022-03-31 | 2023-10-05 | 维沃移动通信有限公司 | Method for initiating bsc link establishment, and terminal and network-side device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005111971A2 (en) * | 2004-04-29 | 2005-11-24 | Battelle Memorial Institute | Tag device, luggage tag, and method of manufacturing a tag device |
| WO2006052386A2 (en) * | 2004-11-05 | 2006-05-18 | Goliath Solutions Llc. | Distributed antenna array with centralized data hub for determining presence and location of rf tags |
| CN1835419A (en) * | 2005-03-18 | 2006-09-20 | 阿尔卡特公司 | Method for adapting an optical transmission unit, optical transmission unit and optical receive unit |
| CN102187348A (en) * | 2008-09-03 | 2011-09-14 | 检查站系统股份有限公司 | Rfid repeater for range extension in modulated backscatter systems |
| KR101590295B1 (en) * | 2015-01-30 | 2016-02-01 | 세종대학교산학협력단 | Wi-Fi Backscatter System Including Intermediate reader and Method For Cooperative Communication using The Same |
| CN107786255A (en) * | 2016-08-30 | 2018-03-09 | 华为技术有限公司 | A kind of method, apparatus and system to be communicated with radio-frequency apparatus |
| US20180234161A1 (en) * | 2017-02-11 | 2018-08-16 | Massachusetts Institute Of Technology | Methods and Apparatus for Analog Relay |
| CN109640371A (en) * | 2018-12-05 | 2019-04-16 | 深圳大学 | Wireless energy-carrying relay communication method and network based on backscattering transmission |
-
2019
- 2019-05-06 CN CN201910370718.2A patent/CN109995413B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005111971A2 (en) * | 2004-04-29 | 2005-11-24 | Battelle Memorial Institute | Tag device, luggage tag, and method of manufacturing a tag device |
| WO2006052386A2 (en) * | 2004-11-05 | 2006-05-18 | Goliath Solutions Llc. | Distributed antenna array with centralized data hub for determining presence and location of rf tags |
| CN1835419A (en) * | 2005-03-18 | 2006-09-20 | 阿尔卡特公司 | Method for adapting an optical transmission unit, optical transmission unit and optical receive unit |
| CN102187348A (en) * | 2008-09-03 | 2011-09-14 | 检查站系统股份有限公司 | Rfid repeater for range extension in modulated backscatter systems |
| KR101590295B1 (en) * | 2015-01-30 | 2016-02-01 | 세종대학교산학협력단 | Wi-Fi Backscatter System Including Intermediate reader and Method For Cooperative Communication using The Same |
| CN107786255A (en) * | 2016-08-30 | 2018-03-09 | 华为技术有限公司 | A kind of method, apparatus and system to be communicated with radio-frequency apparatus |
| US20180234161A1 (en) * | 2017-02-11 | 2018-08-16 | Massachusetts Institute Of Technology | Methods and Apparatus for Analog Relay |
| CN109640371A (en) * | 2018-12-05 | 2019-04-16 | 深圳大学 | Wireless energy-carrying relay communication method and network based on backscattering transmission |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11763106B2 (en) | 2018-06-05 | 2023-09-19 | The Research Foundation For The State University Of New York | Method for passive wireless channel estimation in radio frequency network and apparatus for same |
| CN110225538A (en) * | 2019-06-21 | 2019-09-10 | 电子科技大学 | The non-orthogonal multiple access communications design method of reflecting surface auxiliary |
| CN110225538B (en) * | 2019-06-21 | 2021-04-09 | 电子科技大学 | Reflecting surface assisted non-orthogonal multiple access communication system design method |
| CN110430566A (en) * | 2019-07-26 | 2019-11-08 | 西北工业大学 | A kind of more junction network safe transmission methods of double bounce based on collection of energy |
| CN110545128A (en) * | 2019-08-23 | 2019-12-06 | 东南大学 | Cooperative transmission optimization method in environment backscatter array communication system |
| CN111246493B (en) * | 2020-01-14 | 2022-04-29 | 东南大学 | Label-based relay method in environment backscatter communication |
| CN111246493A (en) * | 2020-01-14 | 2020-06-05 | 东南大学 | Label-based relay method in environment backscatter communication |
| WO2021169586A1 (en) * | 2020-02-27 | 2021-09-02 | 华为技术有限公司 | Communication method and apparatus |
| CN112087792A (en) * | 2020-08-07 | 2020-12-15 | 浙江工业大学 | Node-to-relay node communication method of backscattering-assisted wireless energy supply network |
| CN112087792B (en) * | 2020-08-07 | 2023-07-21 | 浙江工业大学 | Node-to-relay node communication method of backscattering-assisted wireless energy supply network |
| CN112039553A (en) * | 2020-08-19 | 2020-12-04 | 中国人民解放军国防科技大学 | Two-node opportunity mutual cooperation communication method and system based on environment backscattering |
| CN112039553B (en) * | 2020-08-19 | 2021-09-03 | 中国人民解放军国防科技大学 | Two-node opportunity mutual cooperation communication method and system based on environment backscattering |
| CN112202535B (en) * | 2020-09-14 | 2022-02-11 | 西安交通大学 | Multi-user symbiotic communication system and method based on backscattering |
| CN112202535A (en) * | 2020-09-14 | 2021-01-08 | 西安交通大学 | Multi-user symbiotic communication system and method based on backscattering |
| CN112469128A (en) * | 2020-11-27 | 2021-03-09 | 河南理工大学 | User maximum sum rate optimization method in environment backscattering access NOMA system |
| CN113438706A (en) * | 2021-06-10 | 2021-09-24 | 中国石油大学(华东) | Multi-hop backhaul Com network energy optimization routing scheme |
| CN113726400A (en) * | 2021-09-02 | 2021-11-30 | 成都航空职业技术学院 | Multifunctional electronic system for wireless communication and communication method |
| CN113726400B (en) * | 2021-09-02 | 2023-03-24 | 成都航空职业技术学院 | Multifunctional electronic system for wireless communication and communication method |
| WO2023185963A1 (en) * | 2022-03-31 | 2023-10-05 | 维沃移动通信有限公司 | Method for initiating bsc link establishment, and terminal and network-side device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109995413B (en) | 2020-07-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109995413A (en) | A kind of environment backscatter communication method of relaying auxiliary | |
| Ikki et al. | Performance of cooperative diversity using equal gain combining (EGC) over Nakagami-m fading channels | |
| CN107124215B (en) | Full-duplex multi-antenna destination node interference transmission method based on optimal antenna selection | |
| CN109714737B (en) | D2D covert communication system with full-duplex base station cellular network and communication method thereof | |
| CN109714817B (en) | Communication system power allocation method using NOMA and D2D groups | |
| Ji et al. | The efficient BackFi transmission design in ambient backscatter communication systems for IoT | |
| CN105120503B (en) | A kind of high energy efficiency node cooperation transmission method in wireless sensor network | |
| Zou et al. | Outage analysis of opportunistic cooperation over Rayleigh fading channels | |
| CN109525984B (en) | Method for improving safety rate of untrusted relay energy-carrying communication system | |
| US11612009B2 (en) | Apparatus and methods for operating multi-link devices in wireless networks | |
| CN109547039A (en) | A kind of intelligent environment backscatter communication method | |
| CN106961738B (en) | Power and frequency spectrum allocation method based on bit error rate in cooperative cognitive network | |
| US20190014541A1 (en) | Wake-Up-Radio Link Adaptation | |
| Halawi et al. | Performance analysis of circular color shift keying in VLC systems with camera-based receivers | |
| Kakitani et al. | Energy efficiency of transmit diversity systems under a realistic power consumption model | |
| CN108521290A (en) | Power distribution method in a kind of wireless relay collaborative network based on spatial modulation | |
| Asheer et al. | A comprehensive review of cooperative MIMO WSN: its challenges and the emerging technologies | |
| Zheng et al. | Reusing wireless power transfer for backscatter-assisted relaying in WPCNs | |
| Sahin et al. | Performance analysis of two way decode and forward relay network with maximum ratio transmission | |
| CN112039553B (en) | Two-node opportunity mutual cooperation communication method and system based on environment backscattering | |
| Fikadu et al. | Outage probability analysis of dual-hop full-duplex decode-and-forward relaying over generalized multipath fading conditions | |
| Kothapalli et al. | Performance of a bi-directional relaying system with one full duplex relay | |
| ONAY et al. | Ambient Backscatter Communication Based Cooperative Relaying for Heterogeneous Cognitive Radio Networks. | |
| Kakitani et al. | Energy efficiency of amplify-and-forward, repetition coding and parallel coding in short range communications | |
| Dun et al. | Power allocation for half-duplex relay-based D2D communication with qos guarantee |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200728 |