MATLAB: How to divide a signal into blocks

algorithmsignal

I have a noise signal and I want -for some integer K- to break the signal into blocks of K samples, such that the first N samples make up the first block, the next K samples make up the second block, and so on,as below.I want to know if this algorithm correct or not :
   x = radar_noise;                %  input signal
  K = 1000;                       %  K CAPITAL is Block Size
  L = length(x) - mod(length(x),K);       %  only full blocks
  zk = reshape(x(1:L), K, []);
  %M=zeros(K,K);                 %  M ZEROS covariance matrix L*L
  M=[];
  for i=1:size(zk,1)            %  LOOP covariance matrix calculation
      Mz=zk(i,:)*zk(i,:)';  %
      M=M+Mz;
  end
  M=M/K;

Best Answer

x = radar_noise;                %  input signal
K = 1000;                       %  K CAPITAL is Block Size
L = length(x) - mod(length(x),K);  %  only full blocks
zk = reshape(x(1:L), K, []);
This will create zk with each block going down a columns, as you have in your existing code.
It appears to me that in your existing code, once calculate K and L, you then immediately use them with their opposite purposes, using K as if it the number of blocks and using L as if it is a block size.
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