bin_state.m

用Matlab仿真turbocode的算法

function bin_state=bin_state(int_state,m,form)
%To convert an vector of integer(base 10) into a matrix; the i-th row is the binary form 
%of m bits for the i-th integer
%form-->form of desired output(unipolar or bipolar)

for j=1:length(int_state)
   for i=m:-1:1
       state(j,m-i+1)=fix(int_state(j)/ (2^(i-1)));
       int_state(j)=int_state(j)-state(j,m-i+1)*2^(i-1);
   end
end

switch form
    case 'unipolar'
        bin_state=state;
    otherwise
        bin_state = -2*state+1;
end