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基于PDA算法的IDMA高阶调制系统

IDMA Higher-Order Modulated Systems Based on PDA Algorithm
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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)
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参考文献10

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