BER Performance Analysis and Optimum Power Allocation for a Cooperative Diversity System Based on Quadrature Signaling

摘要：

In this paper, an adaptive cooperative diversity system based on quadrature signaling is proposed. With the decodeand-forward(DF) relaying protocol, a tight closed-form approximate bit error rate(BER) for binary phase shift keying(BPSK) constellation modulation is derived, and the effect of inter-user channel quality and power scale factor on system performance is investigated. Theoretical and simulation results show that the proposed system with equal power allocation strategy offers substantial performance gain over non-cooperative system under the channel scenarios of interest, and the full diversity order of two is achieved at high inter-user channel signal-to-noise ratios(SNRs). Furthermore, the derived BER expression makes it possible to optimize the system performance numerically, by finding an optimum power scale factor, which can provide additional benefits when compared to the equal power allocation system.

关键词： wireless communication cooperative diversity decode-and-forward quadrature signaling power allocation

作者: Jing Li Jianhua Ge Lijuan Qi Yong Wang

作者单位: State Key Lab.of Integrated Service Networks,Xidian University,Xian,710071,China

会议类型: 国际会议

会议名称: The IET 2nd International Conference on Wireless,Mobile & Multimedia Networks(第二届IET国际无线移动多媒体网络会议)

会议地点: 北京

会议语种:英文

在线出版日期: 2008-10-12（万方平台首次上网日期，不代表论文的发表时间）