Optimal power allocation to minimize SER for multinode amplify-and-forward cooperative communication systems

中国邮电高校学报(英文) ›› 2008, Vol. 15 ›› Issue (4): 14-18.doi:

Optimal power allocation to minimize SER for multinode amplify-and-forward cooperative communication systems

林霏,刘喜梅,罗涛,乐光新

Digital Communications and Networking Laboratory, Beijing University of Posts and Telecommunications, Beijing 100876, China

收稿日期:2008-02-03 修回日期:1900-01-01 出版日期:2008-12-30
通讯作者: 林霏

Optimal power allocation to minimize SER for multinode amplify-and-forward cooperative communication systems

LIN Fei, LIU Xi-mei, LUO Tao, YUE Guang-xin

Digital Communications and Networking Laboratory, Beijing University of Posts and Telecommunications, Beijing 100876, China

Received:2008-02-03 Revised:1900-01-01 Online:2008-12-30
Contact: LIN Fei

摘要/Abstract

摘要：

An optimal power allocation (OPA) method with mean channel gains is proposed for a multinode amplify-and-forward cooperative communication system. By making use of M-PSK modulation, a closed-form symbol-error-rate (SER) formulation and corresponding upper bound are first derived. Subsequently the OPA method is utilized to minimize the SER. Comparison of the SER of the proposed OPA method with that of the equal power allocation (EPA) method, shows that the SER of both methods, which is approximately optimal performance, is almost the same when relays are near the source. OPA outperforms the EPA when the relays are near the middle between the source and destination or near the destination. The proposed OPA method depends only on the ratio of mean channel gains of the source-to-relay to those of the relay-to-destination. Extensive simulations are performed to validate the theoretical results.

关键词:

amplify-and-forward,;multinode;cooperative;communications,;SER,;power;allocation

Abstract:

Key words:

amplify-and-forward;multinode cooperative communications;SER;power allocation

LIN Fei, LIU Xi-mei, LUO Tao, YUE Guang-xin. Optimal power allocation to minimize SER for multinode amplify-and-forward cooperative communication systems[J]. Acta Metallurgica Sinica(English letters), 2008, 15(4): 14-18.

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Optimal power allocation to minimize SER for multinode amplify-and-forward cooperative communication systems

Optimal power allocation to minimize SER for multinode amplify-and-forward cooperative communication systems

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