一种基于Kay瞬时测频的PSK解码方法

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Kay瞬时测频结合聚类分析的方法,可检测LFM、FSK和PSK信号。对相位编码信号,利用单脉冲多重相关积累算法从信号中提取相位跳变规律,并在此基础上给出了相位编码序列恢复方法。该处理方法在信噪比较高时,计算速度优于短时傅里叶变换(STFT)等方法。最后,通过计算机仿真显示了该方法具有较好的精度和处理结果。

A PSK Signal Decoding Method Based on Kay's Instantaneous Frequency Measurement

The modulation mode and parameters of radar signal are required to determine in electronic reconnaissance.The LFM,FSK and PSK signals can be detected by Kay's instantaneous frequency measurement and clustering method.For phase code signal,the rules of phase-shifting from signal are picked-up by using coherent integration of single pulse,and the method of recovering phase code sequence is proposed.The speed of new method is prior to the Short-Time Fourier Transform(STFT) method when the SNR is high.Finally,the computer simulation shows that this method has better precision and processing result.