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| Power Allocation and Relay Selection in Multi-source Cooperative Networks |
| Hui Hui①② Zhu Shi-hua① Lü Gang-ming① Sun Xiao-dong① |
①(School of Electronics and Information Engineering, Xi’an Jiaotong University, Xi’an 710049, China)
②(School of Automation and Information Engineering, Xi’an University of Technology, Xi’an 710048, China) |
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Abstract In order to minimizing the total transmit power while guaranteeing the outage performance at the same time, in this paper a distributed power allocation and relay selection scheme is proposed for amplify-and-forward cooperative networks with multiple sources and multiple relays. In the proposed scheme, sources select their relays independently, and introduce channel-related timers to compete for their preferred relay. Then the selected relays independently determine whether to forward the messages or not according to a forwarding threshold. Simulation results show that the proposed scheme can reduce the total transmit power of the network significantly and has a similar performance to the optimal central-controlled scheme with a much lower overhead.
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Received: 15 October 2009
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Corresponding Authors:
Zhu Shi-hua
E-mail: szhu@mail.xjtu.edu.cn
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2010, Vol. 32 
