Figure 2From: Motion parameter estimation of multiple ground moving targets in multi-static passive radar systemsSpectrogram and ambiguity function of Doppler signature for two targets at high and low SNR. (a) Spectrogram (SNR = -45 dB). (b) Ambiguity function (SNR = -45 dB). (c) Spectrogram (SNR = -53 dB). (d) Ambiguity function (SNR = -53 dB).Back to article page