Distributed decoding forwarding bidirectional relay selection method under dissymmetrical speeds

A two-way relay, decoding and forwarding technology, applied in radio relay systems, digital transmission systems, electrical components, etc., can solve problems such as poor practicability

Active Publication Date: 2013-04-24
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the existing two-way relay selection method is not very practical and needs to be improved for specific application

Method used

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  • Distributed decoding forwarding bidirectional relay selection method under dissymmetrical speeds
  • Distributed decoding forwarding bidirectional relay selection method under dissymmetrical speeds
  • Distributed decoding forwarding bidirectional relay selection method under dissymmetrical speeds

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Embodiment Construction

[0030] like figure 1 As shown, it is assumed that all candidate relays R in the decoding and forwarding two-way relay system i , i∈{1,2,…,N}, can obtain the channel state information between it and the source node through channel estimation. When the relay R i After receiving the combined signal sent by the source node, the binary information sent by the source node will be decoded. When decoding is successful, relay R i The decoded information is coded and modulated, and superimposed and coded to obtain

[0031] s R , i = α i s A + β i s B

[0032] here α i and beta i is the relay R i The superposition coding power distribution factor of the terminal, there is 0i ,β i i +β i =1 to meet the trans...

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Abstract

A distributed decoding forwarding bidirectional relay selection method under dissymmetrical speeds is suitable for a decoding forwarding bidirectional relay system adopting superposition coding. The method is based on a passive selection method for achieving relay selection after source nodes send data. In overall consideration of nonsymmetry of target speeds of the tow source nodes in a network, by means of using of balancing technique, according to channel state information, the best bidirectional relay selection is carried out, and system performance optimation under any business types and link characteristics can be achieved.

Description

technical field [0001] The invention relates to an opportunistic relay selection method for a decode-and-forward two-way relay communication system at an asymmetric rate, and belongs to the technical field of wireless communication. Background technique [0002] At the beginning of this century, researchers proposed a cooperative diversity (relay) technology to solve the problem that small mobile terminals cannot be equipped with multiple antennas. Different from traditional point-to-point communication, cooperative diversity technology allows different user nodes in a wireless network to share each other's antennas and other network resources, which is expected to greatly increase the capacity and multiplexing gain of wireless networks. At the same time, it also has great development potential in anti-channel fading, covering shadow areas, expanding the effective coverage radius of wireless cellular systems, and enhancing data rates in specific areas. It has become the key ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04B7/14
Inventor 郑宝玉吉晓东陈守宁崔景伍
Owner NANJING UNIV OF POSTS & TELECOMM
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