“LFMCW雷达信号多周期模糊函数分析”再研究

Comment on "Multi-period Ambiguity Function of LFMCW Radar Signal"

针对郭磊等人的论文"LFMCW雷达信号多周期模糊函数分析"中关于线性调频连续波(LFMCW)雷达信号单周期模糊函数的推导及其单周期、多周期距离自相关函数和模糊图仿真有误的情况,该文从周期调制连续波信号的单周期模糊函数定义出发,推导出LFMCW信号的单周期模糊函数,利用单周期模糊函数与周期模糊函数的关系获得LFMCW信号的周期模糊函数。仿真结果表明,LFMCW信号的单周期或周期模糊函数具有奇数个完整的"斜刀刃"和2个"半斜刀刃";周期速度自相关函数是单周期速度自相关函数在多普勒域的N(N为周期数)倍压缩;周期距离自相关函数是其单周期自相关函数的N次复制。

There is a wrong statement in Guo Lei＇s paper ＂Multi-period Ambiguity Function of LFMCW Radar Signal＂ which is about the single period ambiguity function of linear frequency modulated continuous wave（LFMCW） radar signal,its single period and multi-period range autocorrelation and ambiguity diagram.According to the single period ambiguity function（SPAF） of the cycle modulated continuous wave（CW） signal,the SPAF of the chirp-CW is deduced,and the period ambiguity function（PAF） of the chirp-CW is obtained by the relationship between SPAF and PAF.The SPAF or the multi-PAF of LFMCW has odd number of intact ＂knife-edge＂ and two ＂half-knife-edge＂ through simulation.The periodic velocity autocorrelation function is the N（N is the periodic number） times compression of the single velocity autocorrelation function of the LFMCW signal,and the compression times is the periodic number.The periodic range autocorrelation function can be obtained by copying N times of the single periodic range autocorrelation function along the time delay axis.