OP (Orthogonal Projection) and antenna selection combined asymmetric TWR (Two-Way Relay) communication method
An antenna selection, two-way relay technology, applied in wireless communication, electrical components and other directions, can solve the problems of the relay antenna selection method has not been studied in depth, the information transmission scheme needs to be further studied, and signal coding cannot be performed.
Active Publication Date: 2019-02-19
CHANGAN UNIV
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However, in the application scenarios of wireless sensor networks, the design and structure of communication nodes are relatively simple. User nodes usually only have a single transceiver antenna and cannot perform signal encoding. Even if SN nodes are equipped with multiple antennas, it is not suitable to use complex Signal Encoding Scheme
Therefore, in this application scenario, the asymmetric TWR network is not suitable for directly adopting the traditional MU-MIMO technology to realize two-way information interaction between multiple users, and its information transmission scheme needs further research
At the same time, in the information transmission process of the asymmetric TWR network, reasonable selection of the transmitting and receiving antennas of the relay node can effectively improve the network transmission performance, but the relay antenna selection method of the asymmetric TWR network has not been studied in depth.
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[0059] The present invention is described in further detail below in conjunction with accompanying drawing:
[0060] refer to figure 1 , the asymmetric two-way relay communication method of joint orthogonal projection and antenna selection of the present invention comprises the following steps:
[0061] 1) Establish an asymmetric TWR communication network model in the wireless sensor network
[0062] Sink node SN and N user nodes At the same time, a multi-antenna relay station RS is used for two-way information exchange. The sink node SN, multi-antenna relay station RS and each user node are respectively equipped with N antennas, M antennas and 1 antenna, and the sink node SN, multi-antenna relay station RS and Each user node works in half-duplex mode, there is no direct link between the user node and the sink node SN, the wireless channel is assumed to obey quasi-static and flat Rayleigh fading, the fading coefficients of different channels are independent of each other, a...
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The invention discloses an OP (Orthogonal Projection) and antenna selection combined asymmetric TWR (Two-Way Relay) communication method which comprises the following steps of: 1, establishing an asymmetric TWR communication network model in a wireless sensor network; 2, according to the asymmetric TWR communication network model, designing a transmission solution of an asymmetric TWR communication network on the basis of OP and ANC (Analog Network Coding) theories; and 3, calculating an optimal antenna set of a multi-antenna RS (Relay Station) in the asymmetric TWR communication network, andthen completing OP and antenna selection combined asymmetric TWR communication on the basis of the multi-antenna RS. The method can effectively promote network transmission performance on the basis ofrelay antenna selection in the asymmetric TWR communication network.
Description
technical field [0001] The invention belongs to the technical field of wireless communication, and relates to an asymmetric two-way relay communication method combining orthogonal projection and antenna selection. Background technique [0002] In a wireless cooperative communication network, multiple wireless nodes can cooperate with each other and share antennas and wireless channels with each other, so as to obtain space diversity and improve the reliability and throughput of information transmission. Two-way relay (Two-Way Relay, TWR) communication network is a new network architecture in wireless cooperative communication, and it is also a hot field of wireless cooperative communication research in recent years. In the basic TWR communication network, it contains two source nodes and one relay node. There is no direct wireless link between the two source nodes, and they simultaneously perform two-way information exchange through the relay node. The entire information ex...
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IPC IPC(8): H04W40/22
CPCH04W40/22
Inventor 李巍
Owner CHANGAN UNIV