exmp2_10.m

来自「用dsp解压mp3程序的算法」· M 代码 · 共 9 行

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% exmp2_10.m - Generate and check the mean (0) and 
%              variance (1) of white noise
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

N = 1024;                      % length of sequence
vn = (rand(1,N)-0.5)*sqrt(12); % zero-mean, unit variance
mx = mean(vn)                  % check if mean = 0?
variance = std(vn,1)^2         % check if variance = 1?