| 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： |
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| 基金项目: |
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| 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 |
