基于PDA算法的IDMA高阶调制系统  

IDMA Higher-Order Modulated Systems Based on PDA Algorithm

作　　者：朱亮[1] 朱秋萍[1] 王卫兵[1] 

机构地区：[1]武汉大学电子信息学院,湖北武汉430072

出　　处：《武汉大学学报（理学版）》2009年第4期497-500,共4页Journal of Wuhan University:Natural Science Edition

基　　金：国家自然科学基金资助项目(90307017)

摘　　要：本文运用概率数据关联(PDA)算法来实现交织区分多址(IDMA)的高阶调制系统设计,并将近似后的Log-MAP算法应用到基于PDA算法的逐码片迭代多用户检测器中,从而提高了IDMA系统传输速率,并降低了正交幅度调制(QAM)-IDMA系统多用户检测器的复杂度.仿真结果表明,增加Turbo迭代次数可以使得近似后的Max-Log-MAP算法具有Log-MAP算法相同的误比特率性能.Aiming at the issues that practical interleaver-division multiple-access（IDMA） systems do not cover the high-speed transfer in next generational wireless cellular telecommunication, the probability data association （PDA） algorithm was applied to IDMA highe-order modulated systems. Meanwhile, the reasonable approximate Log-MAP algorithm was adopted to chip by chip iterative multi-user detection （MUD）based on PDA to reduce the MUD complexity of QAM-IDMA systems. Simulation results show that the bit error rate performance of Max-Log-MAP algorithm approaches that of Log-MAP algorithm by increasing the number of the Turbo iterations.

关 键 词：交织区分多址 多用户检测 概率数据关联 正交幅度调制 

分 类 号：TN929.5[电子电信—通信与信息系统]