CN108880629A - A kind of collaboration communication method based on Space Time Coding and physical-layer network coding - Google Patents
A kind of collaboration communication method based on Space Time Coding and physical-layer network coding 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
- H04B7/022—Site diversity; Macro-diversity
- H04B7/026—Co-operative diversity, e.g. using fixed or mobile stations as relays
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
- H04L1/0054—Maximum-likelihood or sequential decoding, e.g. Viterbi, Fano, ZJ algorithms
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/22—Demodulator circuits; Receiver circuits
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Abstract
A kind of collaboration communication method based on Space Time Coding and physical-layer network coding, the present invention relates to the collaboration communication methods based on Space Time Coding and physical-layer network coding.The present invention is in order to which the network throughput for solving the problems, such as existing communication system is low and the bit error rate of communication system is high.Communication means of the invention after quadrature carrier modulation is respectively adopted to the information of two user nodes, is broadcasted by Alamouti Space Time Coding from respective two transmitting antennas in the broadcast phase of multi-user Cooperation network model.Relay node R and destination node D is all made of the mapping that maximum-likelihood decoding completes physical-layer network coding.Compared with traditional physical-layer network coding, as bit error rate BER=10‑3When, collaboration communication method of the invention can provide the bit error rate gain of general 7dB.Correspondingly, there has also been very big promotions for grid handling capacity due to the reduction of bit error rate.The present invention is used for wireless communication field.
Description
Technical field
The present invention relates to wireless communication fields, and in particular to based on Alamouti Space Time Coding and physical-layer network coding
Collaboration communication method.
Background technique
Compared to wire communication, the big outstanding feature of the one of wireless communication is exactly the multipath effect of wireless channel, that is, is emitted
There are the propagation paths that a plurality of time delay is different between node and receiving node, when the maximum delay of multipath is greater than the code word duration
When, frequency selective fading can be caused.MIMO technology by utilize radio communication channel multipath transmisstion the characteristics of and it is advanced
Signal processing technology efficiently uses wireless space resource, fights the negative effect of wireless fading channel.Cooperative diversity technique
Appearance, which solves MIMO technology, can not apply to the problems in practical wireless communication systems, but since user needs to send its cooperation
The information of partner consumes additional system capacity, throughput of system is caused to decline.Additionally due to the broadcast characteristic of wireless channel,
That is the electromagnetic wave that a sending node is sent can be received simultaneously by multiple nodes.Likewise, receiving node can also be with
The signal of the transmission from multiple sending nodes is received simultaneously.This broadcast characteristic can cause interfering with each other between signal, give
Entire communication process causes negative impact.
Shengli Zhang et al. was put forward for the first time physical-layer network coding (Physical-Layer in 2006
Network Coding, PNC) concept.Its basic thought is exactly that will mutually be folded in relay node using appropriate mapping mechanism
The electromagnetic signal added is mapped as the exclusive or of responding digital bit stream, so that interference becomes a part of network code algorithm operating.
It can greatly improve the handling capacity of system, for example, comparing Traditional routing solutions in bidirectional relay channel, the system of PNC is gulped down
The amount of spitting can promote 100%.It hereafter, is always to wirelessly communicate to the research of the cooperation communication system based on physical-layer network coding
The research hotspot in field.
The traditional collaboration communication of cooperation communication system very good solution based on physical-layer network coding needs to consume additional
System resource leads to the problem of throughput degradation.However, facing the communication requirement of growing user's high-speed high quality, eventually
Holding multiple antennas chemical conversion is the inexorable trend of Development of Wireless Communications.Under the wireless communications environment of multi-antenna terminal, research joint is empty
When coding and physical-layer network coding cooperation communication system have very strong theoretical value.However, related terminal more days at present
The cooperative system performance study based on physical-layer network coding of line is actually rare.
Summary of the invention
The purpose of the present invention is to solve the network throughput of existing communication system is low and the bit error rate of communication system
High disadvantage, and propose a kind of collaboration communication method based on Alamouti Space Time Coding and physical-layer network coding.
A kind of collaboration communication method based on Space Time Coding and physical-layer network coding includes the following steps：
Step 1：Broadcast phase in multi-user Cooperation network model generates user node S respectively1With user node S2
Dibit information, using quadrature carrier to generate user node S1With user node S2Dibit information be modulated, obtain
User node S1With user node S2Modulated signal；
Step 2：The user node S that step 1 is obtained1With user node S2Modulated signal carry out Alamouti sky when
Coding obtains sending signal, and transmitting antenna is broadcast to relay node R and destination node D for signal is sent；
Step 3：Relay node R and destination node D is respectively received the user node S that transmitting antenna is sent in step 21
With user node S2Mixed signalWithIt is describedWithRespectively indicate relay node R and purpose
The signal that the jth root antenna of node D is received in kth time slot, k=1,2；The every antenna of relay node R and destination node D point
Not Cai Yong attached Correlation Demodulator shown in Fig. 2 demodulation acquisition is carried out to the mixed signal receivedWithFor handling in next step；It is describedWithThe respectively jth root antenna of relay node R is in kth time slot
Receive the inphase component and quadrature component of signal；WithThe jth root antenna of respectively destination node D is in kth
Gap receives the inphase component and quadrature component of signal；
Step 4：Relay node R is according to Alamouti Space Time Coding, the signal that will be obtained after correlation demodulationWith
After carrying out linear combining, Maximum Likelihood Detection is carried out, i.e. acquisition user node S1With user node S2Estimated informationIt is describedIndicate the user S that relay node R is decodediJ-th of information；
Step 5：The user node S that relay node R obtains step 41With user node S2Estimated informationIt is advanced
After row QPSK modulation, then Alamouti Space Time Coding is carried out, the signal after coding is sent by relay node R in relay stages
Give destination node D；
Step 6：Destination node D receive relay node R transmission coding after signal after, by as shown in Fig. 2
Signal is obtained after correlation demodulationIt is illustrated respectively in the jth root of relay stages destination node D
The inphase component and quadrature component for the signal that antenna is received in kth time slot, k=3,4；Destination node D is according to Alamouti sky
When encode, the signal that will be received in four time slotsIt carries out linear combining and obtains user's section
Point S1With user node S2Pooling information, Maximum Likelihood Detection is carried out to obtained pooling information, that is, has decoded in step 1 and has used
Family node S1With user node S2Dibit information, that is, it is logical to complete the cooperation based on Space Time Coding and physical-layer network coding
Letter.
Beneficial effects of the present invention are：
Compared with prior art, the most prominent feature and significant beneficial effect is the present invention：Communication of the invention
Quadrature carrier modulation is respectively adopted to the information of two user nodes in the broadcast phase of multi-user Cooperation network model in method
Afterwards, it is broadcasted by Alamouti Space Time Coding from respective two transmitting antennas.Relay node R and destination node D are adopted
The mapping of physical-layer network coding is completed with maximum-likelihood decoding.The present invention not only reduces the bit error rate of communication system, and
Also improve the network throughput of communication system.
The present invention is directed to further increase the performance of wireless communication system, the same of the network throughput of communication system is improved
When, reduce the bit error rate of communication system.The present invention not only increases the network throughput of communication system, also reduces communication system
The bit error rate of system.Compared with traditional physical-layer network coding, as bit error rate BER=10-3When, collaboration communication of the invention
Method can provide the bit error rate gain of general 7dB.Correspondingly, grid handling capacity also has due to the reduction of bit error rate
Very big promotion.
Detailed description of the invention
Fig. 1 is traffic model schematic diagram of the invention；
Fig. 2 is the principle assumption diagram of Correlation Demodulator；
Fig. 3 is the signal processing flow at relay node R；
Fig. 4 is the communication system bit error rate with signal-to-noise ratio change curve；
Fig. 5 is communication system throughput with signal-to-noise ratio change curve.
Specific embodiment
Specific embodiment one：A kind of collaboration communication method based on Space Time Coding and physical-layer network coding includes following
Step：
Step 1：Broadcast phase in multi-user Cooperation network model generates user node S respectively1With user node S2
Dibit information, using quadrature carrier to generate user node S1With user node S2Dibit information be modulated, obtain
User node S1With user node S2Modulated signal；
Step 2：The user node S that step 1 is obtained1With user node S2Modulated signal carry out Alamouti sky when
Coding obtains sending signal, and transmitting antenna is broadcast to relay node R and destination node D for signal is sent；
Step 3：Relay node R and destination node D is respectively received the user node S that transmitting antenna is sent in step 21
With user node S2Mixed signalWithIt is describedWithRespectively indicate relay node R and mesh
Node D the signal that is received in kth time slot of jth root antenna, k=1,2；The every antenna of relay node R and destination node D
Attached Correlation Demodulator shown in Fig. 2 is respectively adopted, demodulation acquisition is carried out to the mixed signal receivedWithFor handling in next step；It is describedWithThe respectively jth root antenna of relay node R is in kth time slot
Receive the inphase component and quadrature component of signal；WithThe jth root antenna of respectively destination node D is in kth
Gap receives the inphase component and quadrature component of signal；
Step 4：Relay node R is according to Alamouti Space Time Coding, the signal that will be obtained after correlation demodulationWith
After carrying out linear combining, Maximum Likelihood Detection is carried out, i.e. acquisition user node S1With user node S2Estimated informationIt is describedIndicate the user S that relay node R is decodediJ-th of information；
Step 5：The user node S that relay node R obtains step 41With user node S2Estimated informationIt is advanced
After row QPSK modulation, then Alamouti Space Time Coding is carried out, the signal after coding is sent by relay node R in relay stages
Give destination node D；
Step 6：Destination node D receive relay node R transmission coding after signal after, by as shown in Fig. 2
Signal is obtained after correlation demodulationIt is illustrated respectively in the jth root of relay stages destination node D
The inphase component and quadrature component for the signal that antenna is received in kth time slot, k=3,4；Destination node D is according to Alamouti sky
When encode, the signal that will be received in four time slotsIt carries out linear combining and obtains user's section
Point S1With user node S2Pooling information, Maximum Likelihood Detection is carried out to obtained pooling information, that is, has decoded in step 1 and has used
Family node S1With user node S2Dibit information, that is, complete the collaboration communication of Space Time Coding and physical-layer network coding.
Specific embodiment two：The present embodiment is different from the first embodiment in that：Multi-user in the step 1
Collaborative network model includes user node S1, user node S2, relay node R and destination node D, each node configure double antenna,
Each node transmitting power is identical, and each node uses semiduplex working method.
Channel in multi-user Cooperation network model between each node is quasi-static and obedience Rayleigh flat decline, and
And it receives function and obtains accurate channel state information CSI.
Two user nodes are using quadrature carrier simultaneously to relay node and destination node broadcast message.
Other steps and parameter are same as the specific embodiment one.
Specific embodiment three：The present embodiment is different from the first and the second embodiment in that：Divide in the step 1
It Sheng Cheng not user node S1With user node S2Dibit information, using quadrature carrier to generate user node S1It is saved with user
Point S2Dibit information be modulated, obtain user node S1With user node S2The detailed process of modulated signal be：
Broadcast phase generates user node S1Dibit information (x11, x12), generate user node S2Dibit information (x21,
x22), wherein xijIndicate user node SiJth root transmitting antenna need the bit information that sends, i=1,2 be user node sequence
Number, j=1,2 be transmitting antenna serial number；
Using quadrature carrier to generation user node S1With user node S2Dibit information be modulated, obtain respectively
(x11(t)=x11cos2πfcT, x12(t)=x12cos2πfcAnd (x t)21(t)=x21sin2πfcT, x22(t)=x22sin2π
fcT), wherein t is moment, fcFor carrier frequency.
Other steps and parameter are the same as one or two specific embodiments.
Specific embodiment four：Unlike one of present embodiment and specific embodiment one to three：The step 2
In user node S that step 1 is obtained1With user node S2Modulated signal carry out Alamouti Space Time Coding, sent
The detailed process that transmission signal is broadcast to relay node R and destination node D is by signal, transmitting antenna：
Obtain user node S1Transmission signal beWithObtain user node S2Transmission signal beWithWhereinIt is x12(t) conjugation,It is x11(t) conjugation,It is x22(t) be total to
Yoke,It is x21(t) conjugation；
In first time slot of broadcast phase, user node S1With user node S2Signal is sent respectivelyWithIn second time slot of broadcast phase, user node S1With user node S2Signal is sent respectivelyWith
Other steps and parameter are identical as one of specific embodiment one to three.
Specific embodiment five：Unlike one of present embodiment and specific embodiment one to four：The step 3
Described in mixed signalWithSpecially：
Wherein, hSiRmn、hSiDmnRespectively indicate user node SiN-th antenna and relay node R and destination node D the
Channel fading coefficient (m, n=1,2) between m root antenna；Respectively indicate relay node R and destination node D
The noise signal (j, k=1,2) that is received in kth time slot of jth root antenna；It is xijConjugation；
Other steps and parameter are identical as one of specific embodiment one to four.
Specific embodiment six：Unlike one of present embodiment and specific embodiment one to five：The step 4
The middle signal that will be obtained after correlation demodulationWithAfter carrying out linear combining, Maximum Likelihood Detection is carried out, i.e. acquisition user
Node S1With user node S2Estimated informationDetailed process be：
The pooling information for two users' node that linear combining obtains is：
Wherein,It is hSiRmnConjugation；The jth root antenna of relay node R is illustrated respectively in kth
The inphase component and quadrature component for the noise signal that time slot receives, j, k=1,2；It isConjugation；It isConjugation；It isConjugation；It isConjugation；
Other steps and parameter are identical as one of specific embodiment one to five.
Specific embodiment seven：Unlike one of present embodiment and specific embodiment one to six：The step 5
The user node S that middle relay node R obtains step 41With user node S2Estimated informationAfter first carrying out QPSK modulation,
Alamouti Space Time Coding is carried out again, and the signal after coding is sent to destination node D's in relay stages by relay node R
Detailed process is：
The estimated information that relay node R obtains decodingQPSK modulation is carried out first to obtain：
To xR1(t) and xR2(t) Alamouti Space Time Coding is carried out, i.e., in third time slot relay node R to destination node
D sends signal4th time slot sends signalEntire signal processing flow at relay node R is such as
Shown in attached drawing 3.
Other steps and parameter are identical as one of specific embodiment one to six.
Specific embodiment eight：Unlike one of present embodiment and specific embodiment one to seven：The step 6
The middle signal that will be received in four time slotsIt carries out linear combining and obtains user node S1
With user node S2Pooling information be specially：
Wherein hSiDmn, hRDmnRespectively indicate SiN-th transmitting antenna of-D link and R-D link is to m root receiving antenna
Complex channel fading coefficients (m, n=1,2)；It isConjugation；It isConjugation；It isConjugation；It isConjugation；Indicate the user node S that destination node D is obtainediOn jth root transmitting antenna
The pooling information of transmitting information, i, j=1,2.
Other steps and parameter are identical as one of specific embodiment one to seven.
Embodiment one：
Each node is all made of semiduplex working method in the present embodiment, and transmission power is identical, completes primary every use
The transmission that family sends 2 bit informations needs 4 time slots.
Each user node sends the 0 of 1024 bits at random in the present embodiment, 1 information, and the channel in each step is
Quasi-static Rayleigh flat fading channel, and it is 0 that its channel fading coefficient, which is obedience mean value, variance σ2Multiple Gauss it is random
Variable.Attached two users' collaborative network shown in FIG. 1 is symmetrical network, for signal-to-noise ratio angle, S1-R link and S2-R link
Signal-to-noise ratio it is equal, i.e. SNRS1R=SNRS2R=SNRSR；The signal-to-noise ratio of S1-D link and S2-D link is also equal, i.e. SNRS1D=
SNRS2D=SNRSD.In addition, each link signal-to-noise ratio in attached two users' collaborative network model shown in FIG. 1 is identical, i.e. SNRSR
=SNRSD=SNRRD。
After 1000 Monte Carlo simulations are tested, collaboration communication method of the invention and tradition are compiled based on physical layer network
The collaboration communication method of code is compared, and system bit error rate is as shown in Fig. 4 with the change curve of link Signal to Noise Ratio (SNR).In Fig. 4,
Abscissa indicates each link Signal to Noise Ratio (SNR), and range is [0,20] dB；Ordinate indicates that system bit error rate, range are
[10-7,10-1].Figure 4, it is seen that the system bit error rate of collaboration communication method of the invention is based on physics lower than tradition
The bit error rate of the cooperation communication system of layer network coding.Compared with traditional physical-layer network coding, as bit error rate BER=
10-3When, collaboration communication method of the invention can provide the bit error rate gain of general 7dB.
After 1000 Monte Carlo simulations are tested, collaboration communication method of the invention and tradition are compiled based on physical layer network
The collaboration communication method of code is compared, and network throughput is as shown in Figure 5 with the change curve of Signal to Noise Ratio (SNR).In Fig. 5, abscissa table
Show each link Signal to Noise Ratio (SNR), range is [0,20] dB；Ordinate indicate system Normalized throughput, range be [0,
1.1].From figure 5 it can be seen that due to the reduction of system bit error rate, the network throughput of collaboration communication method of the invention
The handling capacity of cooperation communication system higher than tradition based on physical-layer network coding.
The present invention can also have other various embodiments, without deviating from the spirit and substance of the present invention, this field
Technical staff makes various corresponding changes and modifications in accordance with the present invention, but these corresponding changes and modifications all should belong to
The protection scope of the appended claims of the present invention.
Claims (8)
1. a kind of collaboration communication method based on Space Time Coding and physical-layer network coding, it is characterised in that：It is described based on it is empty when
The collaboration communication method of coding and physical-layer network coding includes the following steps：
Step 1：Broadcast phase in multi-user Cooperation network model generates user node S respectively1With user node S2Two
Bit information, using quadrature carrier to generation user node S1With user node S2Dibit information be modulated, obtain user
Node S1With user node S2Modulated signal；
Step 2：The user node S that step 1 is obtained1With user node S2Modulated signal carry out Alamouti Space Time Coding,
It obtains sending signal, transmitting antenna is broadcast to relay node R and destination node D for signal is sent；
Step 3：Relay node R and destination node D is respectively received the user node S that transmitting antenna is sent in step 21With with
Family node S2Mixed signalWithIt is describedWithRespectively indicate relay node R and destination node
The signal that the jth root antenna of D is received in kth time slot, k=1,2；The every antenna of relay node R and destination node D is adopted respectively
Demodulation acquisition is carried out to the mixed signal received with Correlation DemodulatorWithIt is describedWithRespectively the jth root antenna of relay node R is in the inphase component and quadrature component for receiving signal in kth time slot；
WithRespectively the jth root antenna of destination node D is in the inphase component and quadrature component for receiving signal in kth time slot；
Step 4：Relay node R is according to Alamouti Space Time Coding, the signal that will be obtained after correlation demodulationWithIt carries out
After linear combining, Maximum Likelihood Detection is carried out, i.e. acquisition user node S1With user node S2Estimated informationIt is described
Indicate the user S that relay node R is decodediJ-th of information；
Step 5：The user node S that relay node R obtains step 41With user node S2Estimated informationFirst carry out
After QPSK modulation, then Alamouti Space Time Coding is carried out, the signal after coding is sent to by relay node R in relay stages
Destination node D；
Step 6：Destination node D receive relay node R transmission coding after signal after, letter is obtained after correlation demodulation
NumberThe jth root antenna for being illustrated respectively in relay stages destination node D is received in kth time slot
The inphase component and quadrature component of the signal arrived, k=3,4；Destination node D is according to Alamouti Space Time Coding, by four time slots
The signal inside receivedIt carries out linear combining and obtains user node S1With user node S2's
Pooling information carries out Maximum Likelihood Detection to obtained pooling information, that is, has decoded user node S in step 11It is saved with user
Point S2Dibit information, that is, complete the collaboration communication of Space Time Coding and physical-layer network coding.
2. a kind of collaboration communication method based on Space Time Coding and physical-layer network coding according to claim 1, feature
It is：Multi-user Cooperation network model includes user node S in the step 11, user node S2, relay node R and purpose section
Point D, each node configure double antenna, and each node transmitting power is identical, and each node uses semiduplex working method.
3. a kind of collaboration communication method based on Space Time Coding and physical-layer network coding according to claim 1 or claim 2, special
Sign is：User node S is generated in the step 1 respectively1With user node S2Dibit information, using quadrature carrier to life
At user node S1With user node S2Dibit information be modulated, obtain user node S1With user node S2Modulation
The detailed process of signal is：
Broadcast phase generates user node S1Dibit information (x11, x12), generate user node S2Dibit information (x21, x22),
Wherein xijIndicate user node SiJth root transmitting antenna need the bit information that sends, i=1,2 be user node serial number, j
=1,2 be transmitting antenna serial number；
Using quadrature carrier to generation user node S1With user node S2Dibit information be modulated, respectively obtain (x11
(t)=x11cos2πfcT, x12(t)=x12cos2πfcAnd (x t)21(t)=x21sin2πfcT, x22(t)=x22sin2πfcT),
Middle t is moment, fcFor carrier frequency.
4. a kind of collaboration communication method based on Space Time Coding and physical-layer network coding according to claim 3, feature
It is：The user node S that step 1 is obtained in the step 21With user node S2Modulated signal to carry out Alamouti empty
When encode, obtain sending signal, transmitting antenna, which will send signal and be broadcast to the detailed process of relay node R and destination node D, is：
Obtain user node S1Transmission signal beWithObtain user node S2Transmission signal beWithWhereinIt is x12(t) conjugation,It is x11(t) conjugation,It is x22(t) be total to
Yoke,It is x21(t) conjugation；
In first time slot of broadcast phase, user node S1With user node S2Signal is sent respectivelyWith
In second time slot of broadcast phase, user node S1With user node S2Signal is sent respectivelyWith
5. a kind of collaboration communication method based on Space Time Coding and physical-layer network coding according to claim 4, feature
It is：Mixed signal described in the step 3WithSpecially：
Wherein, hSiRmn、hSiDmnRespectively indicate user node SiN-th antenna and relay node R and destination node D m root
Channel fading coefficient between antenna, m, n=1,2；Respectively indicate relay node R's and destination node D
The noise signal that jth root antenna is received in kth time slot, j, k=1,2；It is xijConjugation.
6. a kind of collaboration communication method based on Space Time Coding and physical-layer network coding according to claim 5, feature
It is：The signal that will be obtained after correlation demodulation in the step 4WithAfter carrying out linear combining, maximum likelihood is carried out
Detection, i.e. acquisition user node S1With user node S2Estimated informationDetailed process be：
The pooling information for two users' node that linear combining obtains is：
Wherein,It is hSiRmnConjugation；The jth root antenna for being illustrated respectively in relay node R connects in kth time slot
The inphase component and quadrature component of the noise signal received, j, k=1,2；It isConjugation；It is's
Conjugation；It isConjugation；It isConjugation.
7. a kind of collaboration communication method based on Space Time Coding and physical-layer network coding according to claim 6, feature
It is：The user node S that relay node R obtains step 4 in the step 51With user node S2Estimated informationFirst
After carrying out QPSK modulation, then Alamouti Space Time Coding is carried out, the signal after coding is sent out by relay node R in relay stages
The detailed process for giving destination node D is：
The estimated information that relay node R obtains decodingQPSK modulation is carried out first to obtain：
To xR1(t) and xR2(t) Alamouti Space Time Coding is carried out, i.e., is sent in third time slot relay node R to destination node D
Signal4th time slot sends signal
8. a kind of collaboration communication method based on Space Time Coding and physical-layer network coding according to claim 7, feature
It is：The signal that will be received in four time slots in the step 6Carry out linear combining
Obtain user node S1With user node S2Pooling information be specially：
Wherein hSiDmn, hRDmnRespectively indicate SiComplex channel of n-th transmitting antenna of-D link and R-D link to m root receiving antenna
Fading coefficients, m, n=1,2；It isConjugation；It isConjugation；It isConjugation；It isConjugation,Indicate the user node S that destination node D is obtainediTransmitting information on jth root transmitting antenna
Pooling information, i, j=1,2.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109672505A (en) * | 2019-01-24 | 2019-04-23 | 中国人民解放军海军工程大学 | A kind of orthogonal cooperation transmission method based on sub-carrier indices modulation |
| CN114337924A (en) * | 2021-12-28 | 2022-04-12 | 福州大学 | Mapping design method under physical layer network coding |
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| CN109672505A (en) * | 2019-01-24 | 2019-04-23 | 中国人民解放军海军工程大学 | A kind of orthogonal cooperation transmission method based on sub-carrier indices modulation |
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| CN114337924A (en) * | 2021-12-28 | 2022-04-12 | 福州大学 | Mapping design method under physical layer network coding |
| CN114337924B (en) * | 2021-12-28 | 2023-08-04 | 福州大学 | Mapping design method under physical layer network coding |
| CN114938251A (en) * | 2022-05-18 | 2022-08-23 | 厦门大学 | Underwater acoustic physical layer network coding relay system based on general software radio platform |
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