www.gusucode.com > Student Competition - Code Generation Training工具箱matlab源码 > Student Competition - Code Generation Training/CodeGenFX/Exercises/Exercise2/noiseEstimator.m
function SwHat = noiseEstimator(Yf, n, par, NFFT) %#codegen global Tab % Estimate noise amplitude spectrum Sy = abs(Yf); if n/2 - floor(n/2) == 0 % replace highest amplitude values in Tab Tab(:,end) = Sy(:); else % replace smallest amplitudes values in Tab Tab(:,1) = Sy(:); end % Sort in ascending order PSD values from last D frames Tab = sort(Tab,2); SwHat = par.wOverEstGain*Tab(:,floor(par.q*par.D));