Fig. 3From: DOA estimation of spectrally overlapped LFM signals based on STFT and Hough transformThe single-source TF points selection method, (a) the TF distribution, (b) the grayscale image, (c) peak points in the parameter domain, (d) the detected line segments, (e) single-source TF points, (f) single-source TF points of each signalBack to article page