多径衰落和多用户干扰下的CDMA并行捕获研究

Research on CDMA parallel acquisition in the presence of multi path fading and multi user interference

文章针对移动通信环境中存在的多径衰落和多用户干扰问题，研究了基于并行相关累加器结构的ＣＤＭＡ同步捕获方法，给出了多径衰落信道的数学模型和同步捕获系统模型，采用状态转移函数导出平均捕获时间计算公式，在综合考虑多径衰落，扩频序列自相关，多用户干扰和背景噪声的基础上，详细分析检测器判决变量的统计分布及对系统性能的影响。

This paper investigates the CDMA acquisition method based on parallel architecture with focus on the multi path fading and multi user problems existing in the mobile communication environment.The mathematical channel model and acquisition system model are presented. The mean acquisition time is calculated using state transform function.The statistic distribution of the judge variable is carefully analyzed by considering the ensemble effects of fading,PN code autocorrelation,multi user interference and background noise.