CN107707290A - Based on two-channel trunking method - Google Patents

Based on two-channel trunking method Download PDF

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Publication number
CN107707290A
CN107707290A CN201710939661.4A CN201710939661A CN107707290A CN 107707290 A CN107707290 A CN 107707290A CN 201710939661 A CN201710939661 A CN 201710939661A CN 107707290 A CN107707290 A CN 107707290A
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China
Prior art keywords
signal
main
main signal
receiver
composite
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CN201710939661.4A
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Chinese (zh)
Inventor
万智萍
倪伟传
刘少江
许志明
王凤
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Xinhua College Of Zhongshan University
Xinhua College of Sun Yat Sen University
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Xinhua College Of Zhongshan University
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Priority to CN201710939661.4A priority Critical patent/CN107707290A/en
Publication of CN107707290A publication Critical patent/CN107707290A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15564—Relay station antennae loop interference reduction
    • H04B7/15585—Relay station antennae loop interference reduction by interference cancellation

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses based on two-channel trunking method, including step：Master transmitter sends the first main signal；Master transmitter sends the second main signal；Secondary emitter sends the first composite signal after superposition numbering；Secondary receiver is detected to the first composite signal and cancels the first main signal；Secondary receiver detects to the first composite signal, cancels the first superposition code signal；Main receiver detects the second main signal and the first composite signal；Master transmitter sends the 3rd main signal；Secondary emitter sends the second composite signal of supercomposed coding, and the 3rd main signal is detected；Second composite signal includes the 3rd main signal and the second superposition code signal；The secondary reception composite signal of machine testing second, cancel the second main signal and the second superposition code signal；The secondary reception composite signal of machine testing second, cancels the second main signal.The present invention performs continuous interference decoding and eliminated in each time slot, reduces the influence of main signal and other signal, reduces the interference of time signal.

Description

Based on two-channel trunking method
Technical field
The present invention relates to the communication technology, more particularly to based on two-channel trunking method.
Background technology
In face of increasingly deficient radio spectrum resources, the theoretical proposition of cognitive radio networks, it has also become solve frequency spectrum money The important channel of source problem in short supply.However, although cognitive radio networks take full advantage of idle frequency spectrum, the frequency of network is improved Spectrum efficiency, can not but solve the interference problem that main permitted device is faced in shared frequency spectrum, this certainly reduces master The performance of system.In order to weigh service quality of the primary and secondary system in cognition wireless network, there are many associations based on theory of games Make spectrum-sharing techniques, such as the technology such as random geometry theory, multiple-input and multiple-output (MIMO) is combined applied to cognition wireless Network.But, it is necessary to which multiple stage of communication transmit identical main signal, together in these traditional cooperating relay frequency spectrum share schemes Belt transect carrys out main system and is disturbed the problems such as big and subsystem spectrum access chance is low.
The content of the invention
For overcome the deficiencies in the prior art, it is an object of the invention to provide based on two-channel trunking method, its energy It is big to solve the problems, such as that prior art is disturbed.
The purpose of the present invention is realized using following technical scheme：
Based on two-channel trunking method, applied to relay system, the relay system includes main system, from system, principal series Unite and communicated between system by double-channel, main system includes master transmitter and main receiver, includes two from hair from system Machine and two are penetrated from receiver, are corresponded from emitter and from receiver；Comprise the following steps：
S1：Master transmitter sends the first main signal；
S2：Secondary emitter, secondary receiver and main receiver receive first main signal, and the first main signal is examined Survey；
S3：Master transmitter sends the second main signal；One of them emitter sends the first compound letter after superposition numbering Number, and the second main signal is detected；First composite signal includes the first main signal and the first superposition code signal；
S4：The first composite signal is detected with corresponding receiver of one of them emitter, and cancels first Main signal, the second main signal is detected afterwards；
S5：Another receiver detects to the first composite signal, cancels the first superposition code signal afterwards, and right Second main signal is detected；
S6：Main receiver detects the second main signal and the first composite signal；
S7：Master transmitter sends the 3rd main signal；Another emitter sends the second composite signal of supercomposed coding, And the 3rd main signal is detected；Second composite signal includes the 3rd main signal and the second superposition code signal；
S8：One of them time receives the composite signal of machine testing second, and cancels the second main signal, cancels the second superposition afterwards The 3rd main signal of code signal and detection；
S9：Another time receives the composite signal of machine testing second, and cancels the 3rd main signal of the second main signal and detection, Main receiver detects the 3rd main signal and the second composite signal；
S10：Whether the timeslot number for judging current time slots is even number, if so, then circulating S3 to S6 steps, otherwise, circulates S7 To S9 steps, until current time slots number L=2N, N>=1.
Preferably, also comprise the following steps：
S11：When current time slots number is L+1, another emitter sends the triplex signal after supercomposed coding, its In one time receive the machine testing triplex signal, and cancel L main signals, cancel the 3rd superposition code signal afterwards；
S12：Another time receives machine testing triplex signal, cancels L main signals；
S13：Main receiver detects triplex signal.
Compared with prior art, the beneficial effects of the present invention are：
The present invention performs continuous interference decoding and eliminated, to retrieve in each time slot for secondary receiver The signal needed, reduce the influence of main signal and other signal, can be by the way that secondary signal be made for main receiver Carry out common decoded primary signal for noise, reduce the interference of time signal.
Brief description of the drawings
Fig. 1 is the flow chart of the trunking method based on dual signal of the present invention；
Fig. 2 is the subsystem throughput graph of the present invention.
Embodiment
Below, with reference to accompanying drawing and embodiment, the present invention is described further：
As shown in figure 1, the present invention, which provides one kind, is based on two-channel trunking method, applied to relay system, the relaying system System includes main system, communicated from system, main system and between system by double-channel, and main system includes master transmitter and master connects Receipts machine, include two from emitter and two from receiver from system, corresponded from emitter and from receiver；Including as follows Step：
In time slot 1, S1 and S2, S1 are performed：Master transmitter PT sends the first main signal xPU(1)；
S2：Secondary emitter STi, secondary receiver SRiFirst main signal x is received with main receiver PRPU(1), and to One main signal xPU(1) detected；
In time slot 2, S3 to S6, S3 are performed：Master transmitter PT sends the second main signal xPU(2)；One of them emitter ST1Send the first composite signal after superposition numberingAnd to the second main signal xPU(2) carry out Detection；First composite signalInclude the first main signal xPU(1) and first is superimposed code signal
S4：With one of them emitter ST1Corresponding secondary receiver SR1To the first composite signal x1(2) detected, And cancel the first main signal xPU(1) the second main signal x, is detected afterwardsPU(2)；
S5：Another receiver SR2To the first composite signal x1(2) detected, cancel the first superimposed code letter afterwards NumberAnd to the second main signal xPU(2) detected；
S6：Main receiver PR detects the second main signal xPUAnd the first composite signal x (2)1(2)；
In time slot 3, S7 to S9, S7 are performed：Master transmitter PT sends the 3rd main signal xPU(3)；Another transmitting Machine ST2Send the second composite signal of supercomposed codingAnd to the 3rd main signal xPU(3) carry out Detection；Second composite signal includes the 3rd main signal xPU(3) and second is superimposed code signal
S8：One of them receiver SR1Detect the second composite signal x2(3), and cancel the second main signal xPU(2), it Cancel the second superposition code signal afterwardsAnd the 3rd main signal x of detectionPU(3)；
S9：Another time receives the second composite signal of machine testing x2(3), and cancel the second main signal xPU(2) and detect 3rd main signal xPU(3), main receiver detects the 3rd main signal xPUAnd the second composite signal x (3)2(3)；
S10：Whether the timeslot number for judging current time slots is even number, the method that time slot 2 is repeated when time slot is even timeslots, S3 is then circulated to S6 steps, the method for otherwise, during odd numbered slots repeating time slot 3, circulation S7 to S9 steps, until current time slots Number L=2N, N>=1.
In time slot L+1, secondary transmitter ST2Send the composite signal after supercomposed codingIt is secondary to connect Receive device SR1Detect x2(L+1) signal, x is cancelledPU(L) signal, then cancelSignal.Secondary receiver SR2Detect x2(L + 1) signal, x is cancelledPU(L) signal.Main receiver PR detects x2(L+1) signal.
Using the double-channel trunking scheme, for secondary receiver, continuous interference decoding is performed in each time slot And elimination, to retrieve required signal, reduce the influence of main signal and other signal, can for main receiver Using by by secondary signal as noise come common decoded primary signal, reduce the interference of time signal.
In order to verify set forth herein two-channel trunking method validity, distribute to total transmitting of network in an experiment Power is 60dB, and other experiment parameters are constant, and then each algorithm runs 60s under the experiment condition, observes and records each algorithm Subsystem total throughout, obtained the result shown in Fig. 2.From figure 2 it can be seen that subsystem is always handled up in the operating condition Amount becomes larger with the running time.Wherein, contrast algorithm is better than using the total throughout situation of subsystem under this paper algorithms, this It is due to that this paper algorithms employ the optimal power allocation strategy based on outage probability, is ensureing the condition of main system interruption performance Under, more energy can be distributed for the transmitter of subsystem as much as possible, it is superfluous to avoid occurring main transmitter power, and secondary transmitting The phenomenon of device energy deficiency, therefore performance is preferable on lifting subsystem total throughout.
It will be apparent to those skilled in the art that technical scheme that can be as described above and design, make other various Corresponding change and deformation, and all these changes and deformation should all belong to the protection domain of the claims in the present invention Within.

Claims (2)

1. be based on two-channel trunking method, it is characterised in that applied to relay system, the relay system include main system, from System, main system and is communicated between system by double-channel, and main system includes master transmitter and main receiver, includes from system Two, from emitter and two from receiver, correspond from emitter and from receiver；Comprise the following steps：
S1：Master transmitter sends the first main signal；
S2：Secondary emitter, secondary receiver and main receiver receive first main signal, and the first main signal is detected；
S3：Master transmitter sends the second main signal；One of them emitter sends the first composite signal after superposition numbering, and Second main signal is detected；First composite signal includes the first main signal and the first superposition code signal；
S4：The first composite signal is detected with corresponding receiver of one of them emitter, and cancels the first main letter Number, the second main signal is detected afterwards；
S5：Another receiver detects to the first composite signal, cancels the first superposition code signal afterwards, and to second Main signal is detected；
S6：Main receiver detects the second main signal and the first composite signal；
S7：Master transmitter sends the 3rd main signal；Another emitter sends the second composite signal of supercomposed coding, and right 3rd main signal is detected；Second composite signal includes the 3rd main signal and the second superposition code signal；
S8：One of them time receives the composite signal of machine testing second, and cancels the second main signal, cancels the second superimposed code letter afterwards Number and detection the 3rd main signal；
S9：Another time receives the composite signal of machine testing second, and cancels the 3rd main signal of the second main signal and detection, and master connects Receive device and detect the 3rd main signal and the second composite signal；
S10：Whether the timeslot number for judging current time slots is even number, if so, then circulating S3 to S6 steps, otherwise, circulates S7 to S9 Step, until current time slots number L=2N, N>=1.
2. trunking method as claimed in claim 1, it is characterised in that also comprise the following steps：
S11：When current time slots number is L+1, another emitter sends the triplex signal after supercomposed coding, wherein one Individual secondary reception machine testing triplex signal, and cancel L main signals, cancel the 3rd superposition code signal afterwards；
S12：Another time receives machine testing triplex signal, cancels L main signals；
S13：Main receiver detects triplex signal.
CN201710939661.4A 2017-10-11 2017-10-11 Based on two-channel trunking method Pending CN107707290A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108650008A (en) * 2018-05-17 2018-10-12 北京邮电大学 Communication means based on cognition network and equipment

Citations (3)

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Publication number Priority date Publication date Assignee Title
CN104270228A (en) * 2014-09-01 2015-01-07 西安电子科技大学 Adaptive cooperative transmission method in MIMO-CCRN (Multiple Input Multiple Output-Cooperative Cognitive Radio Network)
CN105072621A (en) * 2015-07-24 2015-11-18 南京邮电大学 Time-sharing cooperative communication implementation method based on OFDM cognitive network
CN105162538A (en) * 2015-07-31 2015-12-16 浙江工业大学 Cognitive user selection method based on optimal performance

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
CN104270228A (en) * 2014-09-01 2015-01-07 西安电子科技大学 Adaptive cooperative transmission method in MIMO-CCRN (Multiple Input Multiple Output-Cooperative Cognitive Radio Network)
CN105072621A (en) * 2015-07-24 2015-11-18 南京邮电大学 Time-sharing cooperative communication implementation method based on OFDM cognitive network
CN105162538A (en) * 2015-07-31 2015-12-16 浙江工业大学 Cognitive user selection method based on optimal performance

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Title
CHAO ZHAI等: "Cooperative Spectrum Sharing Based on Two-Path Successive Relaying", 《IEEE TRANSACTIONS ON COMMUNICATIONS》 *
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108650008A (en) * 2018-05-17 2018-10-12 北京邮电大学 Communication means based on cognition network and equipment
CN108650008B (en) * 2018-05-17 2020-07-07 北京邮电大学 Communication method and device based on cognitive network

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