Overview 0.95 0.9 0.85 0.8 0.75 0.7 0.65 0.6 0.55 -15 -10 5 0 5 10 15 SNR(dB) 5 users and 20 samples each user,P=0.005 77 Overview -15 -10 -5 0 5 10 15 0.55 0.6 0.65 0.7 0.75 0.8 0.85 0.9 0.95 SNR (dB) probability of detecting correctly 5 users and 20 samples each user, Pfa =0.005