www.gusucode.com > SIMULINK Sigma-Delta Toolbox 工具箱matlab源码程序 > SIMULINK Sigma-Delta Toolbox/Sigma-Delta_Toolbox/SNRestimation.m
% simout is the modulator output to test, f is the input frequency used for % the test function snr= SNRestimation(simout, f) fs = 48e3; testsig = simout(30:fs); N = length(testsig); spec=fft(testsig.*ds_hann(N)')/(N/4); snr = calculateSNR(spec(1:fs/2),f);