同频不同速率数字调制混合信号的单通道盲分离  

Single-channel blind separation of digital modulated signals with close carriers and different data rates

作　　者：涂世龙 郑辉 

机构地区：[1]信号盲处理国家重点实验室,四川成都610041

出　　处：《电路与系统学报》2010年第3期43-47,42,共6页Journal of Circuits and Systems

摘　　要：针对同频不同速率数字调制混合信号的单通道盲分离问题,建立了信号的状态空间转移模型,提出了基于粒子滤波的盲分离算法,并重点推导了重要性采样概率密度函数的表达式和粒子权值更新公式。仿真结果表明,粒子滤波算法可以对各项信号参数进行实时动态跟踪,从而有效的实现信号的分离。A state-space model is established for single-channel mixture of two digital modulated signals with close carriers and different data rates. A particle filtering based blind separation algorithm is proposed and the probability density function （pdf） used in importance sampling as well as particle weight updating formula are derived. Simulation results show that the proposed algorithm is extra efficient for the separation since it tracks all the signal parameters well.

关 键 词：盲分离 单通道 不同调制速率 粒子滤波 

分 类 号：TN911.7[电子电信—通信与信息系统]