A Distributed Power Allocation for Cooperative Transmission in Cognitive Radio Systems

Guo  Yan-Yan; Kang Gui-Xia; Zhang  Ning-Bo; Zhang  Ping

doi:10.3724/SP.J.1146.2009.00957

Volume 32 Issue 10

Dec. 2010

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Guo Yan-Yan, Kang Gui-Xia, Zhang Ning-Bo, Zhang Ping. A Distributed Power Allocation for Cooperative Transmission in Cognitive Radio Systems[J]. Journal of Electronics & Information Technology, 2010, 32(10): 2463-2467. doi: 10.3724/SP.J.1146.2009.00957

Citation:

Guo Yan-Yan, Kang Gui-Xia, Zhang Ning-Bo, Zhang Ping. A Distributed Power Allocation for Cooperative Transmission in Cognitive Radio Systems[J]. Journal of Electronics & Information Technology, 2010, 32(10): 2463-2467. doi: 10.3724/SP.J.1146.2009.00957

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A Distributed Power Allocation for Cooperative Transmission in Cognitive Radio Systems

doi: 10.3724/SP.J.1146.2009.00957

Received Date: 2009-07-03
Rev Recd Date: 2010-03-11
Publish Date: 2010-10-19

Abstract

Abstract

The cooperative communication can get better performance of systems than the direct transmission. In particular, how to manage cooperative relays and allocate power among them especially for Cognitive Radio (CR) is one of the most important issue in wireless cooperative diversity systems. For CR systems, cooperative power allocation strategy need consider avoiding the interference with the primary (licensed) users. In this paper, a distributed transmit power allocation algorithm for multi-relays based on Amplify and Forward (AF) cooperative transmission is proposed for spectrum sharing CR systems. It optimizes the performance of the CR system, while the interference experienced by the licensed users is limited. The simulations validate the effectiveness of proposed algorithm by comparing it with the direct transmission and the scheme where equal weights are assigned to the relays.
- Cognitive Radio (CR),
- Cooperative diversity,
- Outage probability,
- Distributed power allocation

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References(1)

References

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