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由于线性调频信号（LFM）的线性时频调制规律，即其模糊度和Wigner－Ville分布（WVD）图象均具有线性峰脊特性，本文利用LFM信号的这一特性，用对其回波的互模糊度函数和WVD进行分析，着重讨论沿着斜脊方向进行后置积累的检测和识别多目标回波的性能，指出WVD后置积累的检测和分辨性能比通用匹配滤波器优越。
Due to the linear time-frequency modulation of the LFM signal, that is, its ambiguities and Wigner-Ville distribution (WVD) images have linear peak ridge characteristics, this paper uses the characteristics of the LFM signal, Mutual ambiguity function and WVD are analyzed. The performance of post-accumulation detection and identification of multi-target echoes along the ridge direction are discussed. The detection and resolution performance of WVD post-accumulation is superior to that of general matched filter.