CN110366228A - It is a kind of to jump relay cooperative transmission method based on interference is eliminated three - Google Patents
It is a kind of to jump relay cooperative transmission method based on interference is eliminated three Download PDFInfo
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Abstract
Relay cooperative transmission method is jumped based on interference is eliminated three the invention discloses a kind of, it is contemplated that actual signal transmission range and direct transmission range in cell, with two secondary junction network SR1、SR2As relaying i.e. by way of three jump, three transmission sub-periods assistance secondary emission end ST are by secondary source information xSTIt is transferred to secondary receiving end SD, wherein when directly relay forwarding cannot be carried out, transmitted by the way of eliminating interference, finally, the secondary source information x that secondary receiving end SD receives three transmission sub-periodsSTIt carries out MRC merging (maximum-ratio combing), completes final decoding.The present invention extends secondary transmission range, improves secondary transmission performance.In addition, the present invention can be realized more flexible relay selection compared with traditional single-hop and double jump relay cooperative transmission method, and there is lower secondary outage probability.
Description
Technical field
The invention belongs to mobile communication technology fields, more specifically, are related to a kind of based in three jumps for interfering elimination
After cooperation transmission method.
Background technique
In recent years, the hair of the 5th third-generation mobile communication (the 5th generation mobile networks, abbreviation 5G)
Exhibition causes the concern of whole world researcher.The developing direction of 5G first is that reduce cell size, this will significantly improve bee
Cell flux, energy efficiency and the user data rate of nest system.Dense network deployment has the above advantages, but can generate a system
Column problem, such as co-channel interference.Therefore, interference becomes the key constraints for improving data rate.Under current research, mention
Go out many for interfering the new solution eliminated.
With the development of 5G, cognitive radio technology (Cognitive Radio, abbreviation CR) is expected to by allowing secondary use
Family (Secondary User, abbreviation SU) is dynamically come using the licensed spectrum that primary user (Primary User, abbreviation PU) possesses
Improve spectrum efficiency.Although licensed band is widely used, the verified certain licensed bands of correlative study are not obtained sufficiently
It utilizes.Cognitive radio allows the licensed band that the utilization of secondary user's dynamic is underused perhaps, without causing to primary user
Harmful interference.
In general, secondary user's are operated in a manner of three kinds, referred to as interweaves, covers and bottom, to utilize licensed spectrum.Perhaps
Mostly the problem related to frequency spectrum share mode has obtained relevant research.Some researchers propose a kind of transport protocol, make
It obtains secondary user's and is capable of detecting when unappropriated licensed spectrum.Overlay frequency spectrum share mode is more sensitive to frequency spectrum perception error,
It will lead to secondary transmission low efficiency.The shortcomings that in order to overcome overlay frequency spectrum share, can use underlay frequency spectrum share skill
Art, this makes regardless of primary user's flow rate mode, and secondary user's may be by licensed spectrum.It is different from interleaving mode, only
Given threshold value is no more than to the interference of primary user, secondary user's can send signal.
Under underlay frequency spectrum mode, double bounce decoding forwarding (Dual-Hop Decode-and Forward, DH-DF)
The secondary transmission performance of relaying can be measured by secondary outage probability.However, still having several due to secondary transmission power limited
Problem needs to solve.For example, how to reduce the effective distance in high path loss environment, and expand transmission coverage area etc..Cause
This, it is some to enhance cognitive radio networks (Cognitive Radio Networks, abbreviation CRN) using multi-hop relay technology
The technology of performance has obtained extensive research.Multi-hop communication system effectively extends transmission range, and improves junction network
Service quality (Quality of Service, abbreviation QoS).
However, the quality of signal transmission may reduce with the increase of relaying hop count.Many common transport protocols,
Elimination (Interference Cancellation, abbreviation IC), relay selection and data balancing etc. are such as interfered, in tradition
Cognitive radio networks in applied, to reduce the interference of primary user and improve secondary transmission performance.Some researchers
Using the bottom cognitive radio networks eliminated based on interference, single-hop and double jump transmission are mainly had studied.Some research people simultaneously
Member derives a kind of cooperation outage probability model and a kind of cooperation Block Error Rate model, interferes to mitigate cochannel and improves system
Performance.Recently, some researchers by research emphasis be placed on for exist simultaneously two interference when interference elimination method on,
It establishes system model and carrys out Analysis interference elimination performance.
However, existing single-hop and double jump relay cooperative transmission method, secondary transmission range is relatively small, transmission performance
It is to be improved.
Summary of the invention
Relay cooperative is jumped based on interference is eliminated three it is an object of the invention to overcome the deficiencies of the prior art and provide a kind of
Transmission method to extend secondary transmission range, and improves secondary transmission performance.
For achieving the above object, the present invention is based on interference is eliminated three to jump relay cooperative transmission method, and feature exists
In secondary emission end ST is operated with time division multiple access way, secondary junction network SR1、SR2It works in semiduplex mode, using solution
Code retransmission protocol, wherein each media access control frames form (three transmission sub-periods) by three continuous transmission stages, according to
It is secondary to be denoted as Tk1、Tk2、Tk3；
(1)、Tk1Transmit sub-period
The primary user network transmitting terminal PT for occupying authorization frequency spectrum initiates data transmission procedure, source information xPTIt is transferred to primary
Family network receiving terminal PD；Unlicensed spectrum user (secondary emission end ST) transmits information x under the premise of limiting own powerSTIt is (secondary
Grade source information) extremely secondary junction network SR1, this transmission process needs to ensure the QoS of primary user's network；
Secondary junction network SR1In any appliance first attempt to decode secondary source information xST, can be according to whether can
It is successfully decoded and is divided into two kinds of situations:
If 1.1), there is equipment that secondary source information x is successfully decodedST, then the equipment of successfully decoded is candidate most as relaying composition
Good relaying decoding set Θ1；
1.2), if all devices decode secondary source information xSTIt is all unsuccessful, then secondary junction network SR1Any appliance is attempted
To interference information (source information) x of primary userPTIt is decoded, also according to whether capable of being successfully decoded and be divided into two kinds of situations:
If there is equipment that source information x is successfully decodedPT, then secondary junction network SR1By source information xPTIt eliminates, all devices are again
It is secondary to secondary source information xSTIt is decoded, the equipment of successfully decoded forms candidate best relay decoding set Θ as relaying1If not having
Have to secondary source information xSTThe equipment of successfully decoded, then transmit failure；
If all devices decode source information xPTIt is all unsuccessful, then transmit failure；
Transmission fails, then best relay decoding set Θ1For sky；
At the same time, secondary receiving end SD passes through direct channels link pair source information xPTIt is decoded, it is secondary if success
Receiving end SD is by source information xPTIt eliminates, recovers secondary source information xSTIf unsuccessful, secondary receiving end SD will be received
Information is as secondary source information xST；
(2)、Tk2Transmit sub-period
Investigate secondary junction network SR1Candidate best relay decoding set Θ1If candidate best relay decoding set Θ1It is non-
Sky, then from candidate best relay decoding set Θ1Middle selection is used as the maximum relaying of secondary receiving end SD Signal to Interference plus Noise Ratio in best
After then continuing to transmit secondary source information x by best relaySTTo secondary junction network SR2；If candidate best relay decoding set
Θ1For empty set, then secondary emission end ST will transmit information xSTIt is transmitted to secondary junction network SR2；
Secondary junction network SR2In any appliance first attempt to decode secondary source information xST, according to step 1.1), 1.2)
Identical method obtains candidate best relay decoding set Θ2；
At the same time, secondary receiving end SD passes through direct channels link pair source information xPTIt is decoded, it is secondary if success
Receiving end SD is by source information xPTIt eliminates, recovers secondary source information xSTIf unsuccessful, secondary receiving end SD will be received
Information is as secondary source information xST；
(3), Tk3 transmits sub-period
Investigate secondary junction network SR2Candidate best relay decoding set Θ2If candidate best relay decoding set Θ2It is non-
Sky, then from candidate best relay decoding set Θ2Middle selection is used as the maximum relaying of secondary receiving end SD Signal to Interference plus Noise Ratio in best
After then secondary junction network SR2Continue to transmit secondary source information x by its best relaySTTo secondary receiving end SD；If candidate
Best relay decoding set Θ2For empty set, then secondary junction network SR1Or secondary emission end ST will transmit information xSTIt is transmitted to secondary
Receiving end SD；
At the same time, secondary receiving end SD passes through direct channels link pair source information xPTIt is decoded, it is secondary if success
Receiving end SD is by source information xPTIt eliminates, recovers secondary source information xSTIf unsuccessful, secondary receiving end SD will be received
Information is as secondary source information xST；
After three transmission sub-period ends of transmission, secondary receiving end SD believes the secondary source that three transmission sub-periods receive
Cease xSTIt carries out MRC merging (maximum-ratio combing), completes final decoding.
The object of the present invention is achieved like this.
Relay cooperative transmission method is jumped based on interference is eliminated three the invention proposes a kind of, it is contemplated that the reality in cell
Signal transmission ranges and direct transmission range, with two secondary junction network SR1、SR2It is by way of three jumps, three as relaying
A transmission sub-period assists secondary emission end ST by secondary source information xSTIt is transferred to secondary receiving end SD, wherein cannot be direct
When carrying out relay forwarding, transmitted by the way of eliminating interference, finally, secondary receiving end SD receives three transmission sub-periods
The secondary source information x arrivedSTIt carries out MRC merging (maximum-ratio combing), completes final decoding.The present invention extends secondary transmission model
It encloses, improves secondary transmission performance.In addition, the present invention can compared with traditional single-hop and double jump relay cooperative transmission method
It realizes more flexible relay selection, and there is lower secondary outage probability.
Detailed description of the invention
Fig. 1 is that three eliminated the present invention is based on interference jump a kind of specific embodiment schematic diagram of relay cooperative transmission method；
Fig. 2 is that three eliminated the present invention is based on interference jump a kind of specific embodiment flow chart of relay cooperative transmission method；
Fig. 3 is Tk2Transmit the schematic diagram of transmission process of sub-period；
Fig. 4 is Tk3Transmit the schematic diagram of transmission process of sub-period.
Specific embodiment
A specific embodiment of the invention is described with reference to the accompanying drawing, preferably so as to those skilled in the art
Understand the present invention.Requiring particular attention is that in the following description, when known function and the detailed description of design perhaps
When can desalinate main contents of the invention, these descriptions will be ignored herein.
One, three relay cooperative transmission is jumped
In the present embodiment, as shown in Figure 1, jumping relay cooperative transmission based on interference is eliminated three includes authorization spectrum users
(primary user) transmission network and unlicensed spectrum user (secondary user's) transmission network, the cognition wireless scene use Underlay
Frequency spectrum access model, primary user network transmitting terminal PT are secondary using authorization spectrum transmissions information to primary user network receiving terminal PD
Transmitting terminal ST waits for an opportunity to access primary user's authorization frequency spectrum according to certain rule, and passes through secondary junction network SR1、SR2Transmit secondary source
Information xSTTo secondary receiving end SD, wherein secondary junction network separately includes N1、N2A candidate relay, each relaying work
Semiduplex mode, using decoding retransmission protocol.It is done as shown in Figure 1, primary user can generate secondary user's and relay transmission network
It disturbs, equally, there is also interference to primary user's network for secondary user's transmission network.In order to ensure the service quality of authorization spectrum users
(Quality of Service), secondary transmission network must control own transmission power.
In the present embodiment, secondary as shown in Fig. 2, the present invention is based on interference is eliminated three to jump relay cooperative transmission method
Transmitting terminal ST is operated with time division multiple access way, secondary junction network SR1、SR2It works in semiduplex mode, is forwarded using decoding
Agreement, wherein each media access control frames form (three transmission sub-periods) by three continuous transmission stages, are successively denoted as
Tk1、Tk2、Tk3。
1、Tk1Transmit sub-period
The primary user network transmitting terminal PT for occupying authorization frequency spectrum initiates data transmission procedure, source information xPTIt is transferred to primary
Family network receiving terminal PD；Unlicensed spectrum user (secondary emission end ST) transmits information x under the premise of limiting own powerSTIt is (secondary
Grade source information) extremely secondary junction network SR1, this transmission process needs to ensure the QoS of primary user's network；
Secondary junction network SR1In any appliance first attempt to decode secondary source information xST, can be according to whether can
It is successfully decoded and is divided into two kinds of situations:
If 1.1), there is equipment that secondary source information x is successfully decodedST, then the equipment of successfully decoded is candidate most as relaying composition
Good relaying decoding set Θ1；
1.2), if all devices decode secondary source information xSTIt is all unsuccessful, then secondary junction network SR1Any appliance is attempted
To interference information (source information) x of primary userPTIt is decoded, also according to whether capable of being successfully decoded and be divided into two kinds of situations:
If there is equipment that source information x is successfully decodedPT, then secondary junction network SR1By source information xPTIt eliminates, all devices are again
It is secondary to secondary source information xSTIt is decoded, the equipment of successfully decoded forms candidate best relay decoding set Θ as relaying1If not having
Have to secondary source information xSTThe equipment of successfully decoded, then transmit failure；
If all devices decode source information xPTIt is all unsuccessful, then transmit failure；
Transmission fails, then best relay decoding set Θ1For sky；
At the same time, secondary receiving end SD passes through direct channels link pair source information xPTIt is decoded, it is secondary if success
Receiving end SD is by source information xPTIt eliminates, recovers secondary source information xSTIf unsuccessful, secondary receiving end SD will be received
Information is as secondary source information xST。
Tk1It transmits in sub-period, primary user's network receiving terminal PD, secondary receiving end SD, secondary junction network SR1, signal table
It is as follows up to formula:
In formula, label (1) represents transmission sub-period Tk1, using interference cancellation techniques, secondary junction network SR1And secondary
Receiving end SD can effectively eliminate the interference information for carrying out primary user.E indicates transmission power, and h indicates channel gain coefficient.It eliminates
Signal expression after interference is respectively as follows:
2、Tk2Transmit sub-period
Investigate secondary junction network SR1Candidate best relay decoding set Θ1If candidate best relay decoding set Θ1It is non-
Sky, then from candidate best relay decoding set Θ1Middle selection is used as the maximum relaying of secondary receiving end SD Signal to Interference plus Noise Ratio in best
After then continuing to transmit secondary source information x by best relaySTTo secondary junction network SR2；If candidate best relay decoding set
Θ1For empty set, then secondary emission end ST will transmit information xSTIt is transmitted to secondary junction network SR2；
Secondary junction network SR2In any appliance first attempt to decode secondary source information xST, according to step 1.1), 1.2)
Identical method obtains candidate best relay decoding set Θ2；
At the same time, secondary receiving end SD passes through direct channels link pair source information xPTIt is decoded, it is secondary if success
Receiving end SD is by source information xPTIt eliminates, recovers secondary source information xSTIf unsuccessful, secondary receiving end SD will be received
Information is as secondary source information xST。
In the present embodiment, as shown in figure 3, in transmission sub-period Tk2, candidate best relay decoding set Θ1There are two kinds of feelings
Condition: Ω1Indicate secondary junction network SR1It can be successfully decoded, i.e., at least one relaying can be successfully decoded, Ξ1Indicate secondary
Junction network SR1Network all devices decode failure, i.e., candidate best relay decoding set Θ1For empty set.
1st kind of situation: if Θ1=Ξ1, then in transmission sub-period Tk2, secondary emission end ST directly transmits a signal in secondary
After network SR2, secondary receiving end SD, secondary junction network SR2Signal expression is received to be respectively as follows:
In formula, label (2) represents transmission sub-period Tk2, secondary receiving end SD, secondary junction network SR2Disappear by interference
Signal expression after removing is respectively as follows:
2nd kind of situation: if Θ1=Ω1, secondary junction network SR1, secondary receiving end SD transmit secondary source information xSTTo secondary
Grade junction network SR2, primary user's network receiving terminal PD, secondary receiving end SD and secondary junction network SR2In transmission sub-period Tk2
Reception signal expression be respectively as follows:
In secondary receiving end SD and secondary junction network SR2After place completes interference elimination, signal expression are as follows:
3, Tk3 transmits sub-period
Investigate secondary junction network SR2Candidate best relay decoding set Θ2If candidate best relay decoding set Θ2It is non-
Sky, then from candidate best relay decoding set Θ2Middle selection is used as the maximum relaying of secondary receiving end SD Signal to Interference plus Noise Ratio in best
After then secondary junction network SR2Continue to transmit secondary source information x by its best relaySTTo secondary receiving end SD；If candidate
Best relay decoding set Θ2For empty set, then secondary junction network SR1Or secondary emission end ST will transmit information xSTIt is transmitted to secondary
Receiving end SD；
At the same time, secondary receiving end SD passes through direct channels link pair source information xPTIt is decoded, it is secondary if success
Receiving end SD is by source information xPTIt eliminates, recovers secondary source information xSTIf unsuccessful, secondary receiving end SD will be received
Information is as secondary source information xST。
In the present embodiment, as shown in figure 4, in transmission sub-period Tk3, secondary junction network SR2Candidate best relay solution
Code collection Θ2There is also two kinds of situations, if candidate best relay decoding set Θ2For empty set, i.e. Θ2=Ξ2, secondary junction network SR1Or
Secondary emission end ST will transmit information xSTIt is transmitted to secondary receiving end SD.
(1)、Θ2=Ξ2, i.e. SR2For empty set.According to whether there is candidate best relay decoding set, also condition is in two kinds of situation.
1st kind of situation: if secondary junction network SR1Candidate best relay decoding set Θ1It also is empty set, then in primary user
The signal expression of network receiving terminal PD and secondary receiving end SD are as follows:
Use for reference transmission sub-period Tk2Analysis, the secondary receiving end SD final signal expression formula after interference is eliminated are as follows:
2nd kind of situation: if secondary junction network SR1Candidate best relay decoding set Θ1For non-empty, can successfully solve
Code signal, the then signal received in primary user's network receiving terminal PD and secondary receiving end SD are as follows:
Similarly, secondary receiving end SD signal expression after interference is eliminated are as follows:
(2)、Θ2=Ω2, i.e. SR2There are best decoding set, then the signal expression at secondary receiving end SD are as follows:
After interference is eliminated, simplify are as follows:
After three transmission sub-period ends of transmission, secondary receiving end SD believes the secondary source that three transmission sub-periods receive
Cease xSTIt carries out MRC merging (maximum-ratio combing), completes final decoding.
Indeed, it is possible to be regarded as the transmission process in multi-hop transmission.As secondary source information xSTIt is sent in k-th
After when, above-mentioned relay selection will be executed, until signal be sent to K+2 relaying.Therefore, three relaying is jumped based on interference is eliminated three
Cooperation transmission is the simplest form of multi-hop model.
Two, secondary network constraint condition
Under cognitive radio scene Underlay model, primary user's Web vector graphic authorization frequency spectrum, secondary user's network is borrowed
The frequency spectrum of primary user's network realizes information transmission, therefore the QoS of primary user's network must be protected.
To the requirement of secondary network transmission power in traditional mechanism, a kind of restrictive condition, i.e. its transmission power are only considered not
Influence the QoS of primary user's network.And improve mechanism proposed in this paper, both consider primary user's network QoS, subsystem hair
Penetrating power must not exceed primary user network power given threshold ξ, and take into account secondary user's own system power limit EThr, cannot
More than the maximum transmission power of default.The control of secondary network transmission power directly affects primary user and secondary user's
Outage probability.
In the present embodiment, secondary emission end and secondary junction network SR1、SR2Maximum transmission power be denoted as respectively:
Wherein:
Wherein, EPTFor main source user transmission power,RAFor primary user's transmission rate,It is primary
The channel variance coefficient of family network transmitting terminal PT to primary user's network receiving terminal PD,For secondary junction network SR1To master
The channel variance coefficient of user network receiving end PD,For secondary junction network SR2To primary user's network receiving terminal PD's
Channel variance coefficient.
Three, simulation analysis
By Monte Carlo simulation, first using interference cancellation mechanisms perception coordination mechanism (single relaying with double relaying) with
Traditional mechanism is made comparisons, and is analyzed it and is interrupted probabilistic simulation result.It improves mechanism and traditional mechanism secondly, being compared using emulation
Secondary energy efficiency of transmission, and analyzed.Assuming that each relaying cluster includes that there are two relayings in simulations.It is imitative to simplify
Very, it is set in link all in mechanism and all obeys Rayleigh fading.Secondary outage probability of the invention is substantially reduced.
Importantly, this invention takes more flexible relay route selection mechanisms, relative to double bounce cooperation transmission
The characteristics of scheme, three jump cooperation transmission schemes more meet multi-hop cooperation transmission network.
Although the illustrative specific embodiment of the present invention is described above, in order to the technology of the art
Personnel understand the present invention, it should be apparent that the present invention is not limited to the range of specific embodiment, to the common skill of the art
For art personnel, if various change the attached claims limit and determine the spirit and scope of the present invention in, these
Variation is it will be apparent that all utilize the innovation and creation of present inventive concept in the column of protection.
Claims (2)
1. a kind of jump relay cooperative transmission method based on interference is eliminated three, which is characterized in that secondary emission end ST is more with the time-division
Location mode operates, secondary junction network SR1、SR2It works in semiduplex mode, using decoding retransmission protocol, wherein each matchmaker
Body access control frame forms (three transmission sub-periods) by three continuous transmission stages, is successively denoted as Tk1、Tk2、Tk3；
(1)、Tk1Transmit sub-period
The primary user network transmitting terminal PT for occupying authorization frequency spectrum initiates data transmission procedure, source information xPTIt is transferred to primary user's net
Network receiving end PD；Unlicensed spectrum user (secondary emission end ST) transmits information x under the premise of limiting own powerST(secondary source
Information) extremely secondary junction network SR1, this transmission process needs to ensure the QoS of primary user's network；
Secondary junction network SR1In any appliance first attempt to decode secondary source information xST, can be according to whether can succeed
Decoding is divided into two kinds of situations:
If 1.1), there is equipment that secondary source information x is successfully decodedST, then the equipment of successfully decoded as relaying composition it is candidate best in
After decoding set Θ1；
1.2), if all devices decode secondary source information xSTIt is all unsuccessful, then secondary junction network SR1Any appliance is attempted to master
Interference information (source information) x of userPTIt is decoded, also according to whether capable of being successfully decoded and be divided into two kinds of situations:
If there is equipment that source information x is successfully decodedPT, then secondary junction network SR1By source information xPTIt eliminates, all devices are right again
Secondary source information xSTIt is decoded, the equipment of successfully decoded forms candidate best relay decoding set Θ as relaying1If not right
Secondary source information xSTThe equipment of successfully decoded, then transmit failure；
If all devices decode source information xPTIt is all unsuccessful, then transmit failure；
Transmission fails, then best relay decoding set Θ1For sky；
At the same time, secondary receiving end SD passes through direct channels link pair source information xPTIt is decoded, if success, secondary is received
Hold SD by source information xPTIt eliminates, recovers secondary source information xSTIf unsuccessful, secondary receiving end SD is by received information
As secondary source information xST；
(2)、Tk2Transmit sub-period
Investigate secondary junction network SR1Candidate best relay decoding set Θ1If candidate best relay decoding set Θ1For non-empty,
Then from candidate best relay decoding set Θ1Middle selection makes the maximum relaying of secondary receiving end SD Signal to Interference plus Noise Ratio be used as best relay,
Then continue to transmit secondary source information x by best relaySTTo secondary junction network SR2；If candidate best relay decoding set Θ1
For empty set, then secondary emission end ST will transmit information xSTIt is transmitted to secondary junction network SR2；
Secondary junction network SR2In any appliance first attempt to decode secondary source information xST, according to step 1.1), 1.2) identical
Method, obtain candidate best relay decoding set Θ2；
At the same time, secondary receiving end SD passes through direct channels link pair source information xPTIt is decoded, if success, secondary is received
Hold SD by source information xPTIt eliminates, recovers secondary source information xSTIf unsuccessful, secondary receiving end SD is by received information
As secondary source information xST；
(3), Tk3 transmits sub-period
Investigate secondary junction network SR2Candidate best relay decoding set Θ2If candidate best relay decoding set Θ2For non-empty,
Then from candidate best relay decoding set Θ2Middle selection makes the maximum relaying of secondary receiving end SD Signal to Interference plus Noise Ratio be used as best relay,
Then secondary junction network SR2Continue to transmit secondary source information x by its best relaySTTo secondary receiving end SD；If candidate is most
Good relaying decoding set Θ2For empty set, then secondary junction network SR1Or secondary emission end ST will transmit information xSTSecondary is transmitted to connect
Receiving end SD；
At the same time, secondary receiving end SD passes through direct channels link pair source information xPTIt is decoded, if success, secondary is received
Hold SD by source information xPTIt eliminates, recovers secondary source information xSTIf unsuccessful, secondary receiving end SD is by received information
As secondary source information xST；
After three transmission sub-period ends of transmission, secondary receiving end SD transmits the secondary source information x that sub-periods receive for threeST
It carries out MRC merging (maximum-ratio combing), completes final decoding.
2. according to claim 1 jump relay cooperative transmission method based on interference is eliminated three, which is characterized in that secondary hair
Penetrate end and secondary junction network SR1、SR2Maximum transmission power be respectively as follows:
Wherein:
Wherein, ξ is main user network power setting threshold value, EThrFor secondary user's own system power limit,RA
For primary user's transmission rate,For main user network transmitting terminal PT to the channel variance system of primary user's network receiving terminal PD
Number,For secondary junction network SR1To the channel variance coefficient of primary user's network receiving terminal PD,For secondary relaying
Network SR2To the channel variance coefficient of primary user's network receiving terminal PD.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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