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基于短时傅里叶变换的相位编码信号分析
董海
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(中国西南电子技术研究所，成都 610036)

摘要:

在电子侦察中，需要判断截获的雷达信号的调制方式和调制参数。利用递归式短时傅里叶变换(STFT)和相参积累的分析方法，可对相位编码信号进行检测和解码。与一些常规方法相比，该方法在较低信噪比时也可以得到较好的分析结果。最后，通过计算机仿真验证了该方法的有效性。

关键词: 电子侦察信号处理时频分析短时傅里叶变换相参积累

DOI：10.3969/j.issn.1001-893X.

基金项目:

Phase Coded Signal Analysis Based on STFT

DONG Hai

(Southwest China Institute of Electronic Technology, Chengdu 610036，China)

Abstract:

The modulation feature parameter recognition of radar signal is import ant in electronic reconnaissance.The phasecoded signal can be detected and dec oded by using recursive shorttime Fourier transform(STFT) and coherent integra tion. Compare d with routine ways, the new method can obtain preferable analytic result in low er SNR. Finally the validity of the method is proved by computer simulation.

Key words: electronic reconnaissance signal processing time frequency analysis short time Fourier transform(STFT) coherent integration