一种同步组网跳频信号的盲分离方法  

A Blind Separation Method for Synchronous-networking Frequency Hopping Signals

作　　者：耿健[1] 杨威[1] GENG Jian;YANG Wei(School of Electronics and Information,Nanchang Institute of Technology,Nanchang 330044,China)

机构地区：[1]南昌理工学院电子与信息学院,南昌330044

出　　处：《电讯技术》2018年第12期1464-1469,共6页Telecommunication Engineering

摘　　要：针对多路混合的同步组网跳频信号,提出了一种基于时频分析的盲分离方法。首先利用同步组网的各跳频信号中各信号跳时相同、跳周期相同等特点,利用平滑伪魏格纳分布(SPWVD)提取信号在时频分布上的特征值。在此基础上,采用基于短时傅里叶变换(STFT)时频比方法对同步组网跳频电台信号进行分离。仿真实验表明,这种方法能有效分离同步组网电台跳频信号,且在跳频间隔较小时,依然具有良好的分离效果。A novel method for seperating synchronous-networking frequency hopping(FH)signals based on time-frequency analysis is proposed.Since the hop rate and hop period of synchronous-networking FH signals are the same,a method on smoothed-pseudo Wigner-Ville Distribution(SPWVD)is applied to extract the characteristics of signals.Then the blind separation algorithm of FH signals with time-frequency ration of matrix based on Short Time Fourier Transform(STFT)is improved.Simulation results show that the proposed algorithm is effective in separation of synchronous-networking FH signals,even though the interval between FH signals is relatively small.

关 键 词：同步组网 跳频信号 盲源分离 时频分布 

分 类 号：TN911.7[电子电信—通信与信息系统]