Fig. 7From: Intra-pulse modulation recognition using short-time ramanujan Fourier transform spectrogramScatter plots of 5th vs 27th moments of 4 type modulation signals classes based on ST-RFT and STFT: (a) STFT based algorithm for SNR = 5 dB; (b) STFT based algorithm for SNR = -5 dB; (c) ST-RFT based algorithm for SNR = 5 dB; (d) ST-RFT based algorithm for SNR = -5 dBBack to article page