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Scheme for combining space-time code cooperation, relay selection and power distribution

A technology of space-time coding and space-time group coding, applied in power management, space transmit diversity, diversity/multi-antenna system, etc. The effect of following conflict of selection, guaranteeing diversity order and bit error rate performance, and low algorithm complexity

Inactive Publication Date: 2013-01-02
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0006] The problem to be solved by the present invention is: how to provide a new space-time coding cooperative relay selection and power allocation joint scheme, which can overcome the defects in the prior art and solve the problem of relay selection and power allocation in cooperative communication. The problem of high complexity and difficult realization of power distribution

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  • Scheme for combining space-time code cooperation, relay selection and power distribution
  • Scheme for combining space-time code cooperation, relay selection and power distribution
  • Scheme for combining space-time code cooperation, relay selection and power distribution

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with accompanying drawing:

[0027] Given a cooperative communication network model based on 802.11a such as figure 1 As shown, the original terminal S achieves the purpose of transmitting data to the destination terminal D through cooperation with the relay terminal.

[0028] There are M single-antenna terminals in the network, including 1 source terminal, 1 destination terminal and M-2 potential relay terminals, among which there are N (N≤M-2) terminals that can correctly decode the source node information , the N terminals and the source terminal together form a virtual antenna array VAA cell, from which K terminals are selected as relay terminals, and the source terminal can also be used as a relay cooperation terminal. It is assumed that the distance between the terminals in the VAA cell is small, so that the source terminal can perform broadcast communication with the terminals in the VAA cell w...

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Abstract

The invention discloses a scheme for combining space-time code cooperation, relay selection and power distribution, which comprises the following steps: measuring the state information of information channels of a source terminal, a candidate relay terminal and a target terminal in communication; making relative decisions of relay selection, space-time code cooperation and power distribution by the target terminal according to the measured state information of the information channels, and returning the decision information to the source terminal and the relay terminal; informing the source terminal by the relay terminal to send data; sharing the data to be sent with the relay terminal by the source terminal; carrying out space-time block coding on the data sent by the source terminal by the relay terminal; obtaining each transmitted data according to the decision information; distributing power based on a resource contribution rate by the relay terminal according to the decision information, and sending the data to the target terminal by using the power value; carrying out space-time decoding on the received signals by the target terminal to obtain the initial sending data, and sending confirmation information to a source node.

Description

technical field [0001] The invention relates to the technical field of wireless network communication, in particular to a joint scheme of relay selection and power allocation in a space-time coding cooperation scheme. Background technique [0002] Cooperative diversity is a technology that realizes space diversity by sharing antennas of different terminals. This technology can effectively resist multipath fading and improve system capacity. Cooperative diversity technology can be used in various occasions such as wireless ad hoc networks, wireless local area networks, and wireless sensor networks. In the future, these networks will be combined to form a new ubiquitous intelligent network, which will cause major changes in the field of mobile communications. [0003] Cooperative diversity can resist the multipath fading of wireless channel, and can improve the system capacity. Combined with space-time block coding, it can improve the system performance more effectively. [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/02H04B7/04H04W28/18H04W52/24
Inventor 隆克平刘健郑国强邝育军
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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