Fsk / psk radar signal is the signal with both fsk and psk modulation at one time . it is with large bandwidth time product ( bt ) , thumbtack - like ambiguity function and well ability of anti - emi . the fsk / psk signals of which the frequency - hopping and bi - phase sequences were randomly chosen often have high sidelobe level Fsk / psk信号是同时进行频移键控( fsk )和相移键控( psk )调制的信号,该信号具有大时带宽积( bt )和高分辨特性,并具有“图钉型”模糊图结构、低截获概率( lpi )特性和较好的抗干扰能力,受到了广泛的重视。