基于偏时域相干算法的信号分离  

A Method of Separating Signals Based on Partial Time-domain Coherent Algorithm

作　　者：韩峰[1] 麻硕士[1] 崔红梅[1] 樊昕[2] 梁立涛[2] 

机构地区：[1]内蒙古农业大学机电工程学院,呼和浩特010018 [2]内蒙古工业大学机械学院,呼和浩特010051

出　　处：《弹箭与制导学报》2008年第2期189-192,共4页Journal of Projectiles,Rockets,Missiles and Guidance

基　　金：国家自然科学基金(60672138)资助

摘　　要：基于偏时域相干算法的信号分离方法能够高质量地分离确定性信号,对于混有随机噪声或爆炸、断裂等瞬态过程的信号也具有较好的分离效果。该方法利用偏时域相干函数这一高阶统计量对信号的瞬时混叠模型进行分析,在完成参数估计的基础上实现各信号分离。该方法与自适应分离方法的输入信号模型等价,但概念、算法简明。对具有噪声频谱特点的瞬态和随机信号进行了实验研究,结果表明该方法在分离非平稳信号方面比自适应分离方法具有更强的功能和更高的准确度。The method of separating signals based on partial time-domain coherent algorithm can precisely separate nonrandom signals and satisfactorily handle signals mixed with random noise or instantaneous signals such as explosion or fracture component. A instant-mixing model was analyzed first by applying partial time-domain coherent function, i.e. a second order statistics. Then, the parameters of the model were estimated and each component contained in the mix was eventually separated. The input signal model for this solution is virtually the same as that of the self-adapting separation but the idea and algorithm are simple and easy for understand. As is shown from the results of computer simulation experiments on random noise and instantaneous signals with the frequency features of color noises, both function and separating precision of this solution are better than those of the self-adapting in separating the impulsive signals.

关 键 词：信号分离 瞬态信号 时域相干 自适应 

分 类 号：TN911[电子电信—通信与信息系统]