TAS/SEC系统在N-Nakagami信道下的性能分析  

Performance analysis of TAS/SEC system under N-Nakagami fading channels

作　　者：徐凌伟[1] 张浩[1,2] GULLIVER T A 

机构地区：[1]中国海洋大学信息科学与工程学院,山东青岛266100 [2]维多利亚大学电子与计算机工程学院

出　　处：《山东大学学报（工学版）》2015年第4期84-90,共7页Journal of Shandong University（Engineering Science）

基　　金：国家自然科学基金资助项目(61301139;61304222);山东省自然科学基金资助项目(ZR2012FQ021);青岛市国际科技合作资助项目(12-1-4-137-hz)

摘　　要：为了降低移动设备的硬件复杂度,提出了一种基于发射天线选择和切换检测合并的传输机制。利用信噪比的概率密度函数,分别生成了相移键控调制、正交幅度调制、脉冲幅度调制的矩生成函数,将其进行积分,得到了平均符号误码率的精确表达式。将信噪比的概率密度函数进行积分,得到了中断概率的闭合表达式。仿真结果表明,系统的性能可以通过增加发射/接收天线数和衰弱系数、减小衰弱因子来改善。In order to reduce hardware complexity of mobile devices, a new transmission scheme was proposed based on transmit antenna selection and switch-and-examine combining. The probability density function of the signal-to-noise ra- tio was used to generate the moment generating functions for phase shift keying modulation, quadrature amplitude mod- ulation, and pulse amplitude modulation. By integrating the moment generating functions, the exact average symbol error probability expressions were derived. The exact closed-form outage probability expressions were also derived by integrating the probability density function of the signal-to-noise ratio. The simulation results showed that the system performance was improved with the transmitting/receiving antennas and the fading coefficient increased, while the fading factor decreased.

关 键 词：发射天线选择 切换检测合并 N-Nakagami信道 平均符号误码率 中断概率 

分 类 号：TN929.5[电子电信—通信与信息系统]