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一种同步组网跳频信号的盲分离方法
耿健,杨威
0
(南昌理工学院 电子与信息学院,南昌 330044)
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。
关键词:  同步组网  跳频信号  盲源分离  时频分布
DOI:
基金项目:
A blind separation method for synchronous-networking frequency hopping signals
GENG Jian,YANG Wei
(School of Electronics and Information,Nanchang Institute of Technology,Nanchang 330044,China)
Abstract:
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.
Key words:  synchronous-networking  frequency hopping signals  blind separation  time-frequency analysis
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