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.
出处
《武汉大学学报(理学版)》
CAS
CSCD
北大核心
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)
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
interleaver-division multiple-access (IDMA)
multi-user detection (MUD)
probability data association (PDA)
quadrature amplitude modulation (QAM)