基于短时傅里叶变换的相位编码信号分析

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.

Phase Coded Signal Analysis Based on STFT

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.