太赫兹科学与电子信息学报, 2015, 13 (1): 142, 网络出版: 2015-11-30
GMSK 混合信号的PSP 盲分离算法
PSP blind separation algorithm for GMSK mixed signals
GMSK 混合信号 线性近似 盲分离 逐幸存路径处理 GMSK mixing signals linear approximation blind separation Per-Survivor Processing
摘要
针对GMSK 混合信号的单通道盲分离问题进行了研究。由于不能直接采用逐幸存路径处理(PSP)算法对GMSK 混合信号进行分离,考虑对GMSK 信号作线性近似处理,使得GMSK 混合信号适用于PSP 算法。该算法通过在符号序列和信道参数组成的联合空间进行最大似然估计,保留最优路径,输出符号对,从而获得分离信号。仿真结果表明,使用PSP 算法对GMSK 混合信号进行分离的误码率性能略优于粒子滤波算法误码率性能,但复杂度远低于粒子滤波算法。
Abstract
The single-channel blind separation of GMSK(Gaussian Minimum Shift Keying) mixing signals is researched. The GMSK mixing signals can not be separated by the Per-Survivor Processing (PSP) algorithm directly, therefore, linear approximation processing of the GMSK signal is considered, which enables GMSK signal to be separated by the PSP algorithm. This algorithm separates the GMSK mixing signals by maximum likelihood estimation in the joint space of the symbol sequential and the channel parameters, reserves the best path and outputs the symbol pairs to get the separated signals. Simulation results show that the bit error rate performance produced by the PSP algorithm on separating the GMSK mixing signals is slightly better than that produced by the particle filtering algorithm; and the complexity of the proposed PSP algorithm is much smaller.
张豪, 杨育红, 辛刚, 杜森. GMSK 混合信号的PSP 盲分离算法[J]. 太赫兹科学与电子信息学报, 2015, 13(1): 142. ZHANG Hao, YANG Yuhong, XIN Gang, DU Sen. PSP blind separation algorithm for GMSK mixed signals[J]. Journal of terahertz science and electronic information technology, 2015, 13(1): 142.