等增益合并下协作MTM系统的性能分析  被引量:1

Performance Analysis of Cooperative MTM Communication with Equal Gain Combining

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作  者:宫丰奎[1] 李连本[1] 叶鹏[1] 张南[1] 

机构地区:[1]西安电子科技大学ISN国家重点实验室,西安710071

出  处:《电子科技大学学报》2013年第3期360-364,共5页Journal of University of Electronic Science and Technology of China

基  金:国家自然科学基金(61001207);中央高校基本科研业务费(K5051301001;K5051201035);高等学校学科创新引智计划(B08038)

摘  要:针对双移动(MTM)系统的重叠衰落信道特性,给出了基于等增益合并(EGC)的协作实现方案,分析了该方案在双跳译码转发(DF)协议下的接收机性能。假定MTM信道服从重叠Nakagami-m衰落,通过帕德近似方法得到了输出信噪比对应矩母函数(MGF)的近似式,并进一步推导出M-PSK调制方式下系统的近似误符号率。仿真表明,不同信道参数下,理论和仿真曲线基本吻合,MGF且较性能最优的最大比合并,采用EGC性能损失约为1 dB。A cooperative communication scheme with equal gain combining (EGC) is presented to deal with the severe double fading channels in mobile-to-mobile (MTM) systems. Performance analysis of this scheme is addressed for the dual-hop decode-and-forward (DF) protocol. Double Nakagami-m fading is assumed for the considered MTM eharmels. The approximate expression of the moment-generating function (MGF) of the output signal-to-noise ratio is firstly provided by using the Pad6 approximation. Furthermore, the closed-form expression of the approximate symbol error rate is derived for M-phase-shift keying modulation. Simulation results show that the theoretical results match the corresponding simulation curves under various channel parameters. Compared with optimum maximum ratio combining, the performance degradation caused by EGC is about 1 dB.

关 键 词:协作通信 译码转发 重叠Nakagami-m衰落 等增益合并 移动对移动通信 

分 类 号:TN911[电子电信—通信与信息系统]

 

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