双向机会中继AF协作CE-OFDM系统性能分析  

PERFORMANCE ANALYSIS OF TWO-WAY OPPORTUNISTIC RELAYING AMPLIFY-AND-FORWARD CE-OFDM SYSTEMS

作　　者：严国飞[1] 

机构地区：[1]杭州电子科技大学通信工程学院,浙江杭州310018

出　　处：《南阳理工学院学报》2013年第6期25-28,共4页Journal of Nanyang Institute of Technology

摘　　要：本文研究两源节点之间具有直达路径的双向机会中继放大前传(TWOR-AF)协作恒包络正交频分多址复用(CE-OFDM)系统的误码性能。利用矩生成函数(MGF)的方法,推导矩形M进制正交幅度调制的TWOR-AF协作CE-OFDM系统的平均误比特率(BER)下界解析表达式。仿真表明在小相位调制系数和高信噪比时下界与平均误比特率很吻合。数值和仿真结果均阐明了中继节点数目和相位调制系数对具有直达链路TWOR-AF协作CEOFDM系统的平均误码性能有影响,具有直达链路的TWOR-AF协作CE-OFDM系统的误码性能相比无直达链路的得到一定改善。In this paper, we investigate the symbol error rate （SER） performance of two-way opportunistic amplify-and-forward （TWOR-AF） relaying constant envelope orthogonal frequency-division multiple （CE-OFDM） system with direct link between two sources. Using the moment generating function-based analysis approach, we obtain the lower bound expression of average SER for TWOR-AF CE-OFDM systems with rectangular M-ary quadrature amplitude modulation. Simulation results show that the lower bound match the average SER for TWOR-AF CE-OFDM systems very well under a small phase modulation index value and a high signal-to- noise rate. Both numerical and simulation results elaborate the effect of phase modulation index and the number of relay node on the SER of TWOR-AF CE-OFDM system with direct link . The Performance of TWOR-AF CE-OFDM system with direct link is better than without direct link.

关 键 词：双向机会中继 放大前传 恒包络正交频分复用 矩形MQAM 误码率 

分 类 号：TN929.5[电子电信—通信与信息系统]