Fig. 5From: Signal-to-noise ratio estimation for M-QAM signals in η−μand κ−μfading channelsVariance of the estimate \(\hat {\gamma }\) as a function of the number of samples N for different values of SNR γ and 64-QAM modulation considering κ−μ fading with κ=1.1 and μ=0.3Back to article page