www.pudn.com > space-timecodingBrankaVuceticJinhongYuan.rar > branch_metric.m, change:2004-03-19,size:399b

function metric = branch_metric(sig,q_test,ch_coefs) 
 
[n,m] = size(ch_coefs); 
[q_dim,foo] = size(q_test); 
sig = repmat(sig,q_dim,1); 
outsum = 0; 
for j=1:m % outer sum 
  insum = 0; 
  
	for i=1:n % inner sum 
      insum1 = ch_coefs(i,j) .* q_test(:,i); 
      insum = insum + insum1; 
  end 
    outsum1 = abs(sig(:,j) - insum) .^ 2; 
  outsum = outsum + outsum1; 
end 
   
metric = outsum;