bin_state.m

来自「turbo码的译码」· M 代码 · 共 20 行

function bin_state = bin_state( int_state, m )
% Copyright Matt C. Valenti
% MPRG lab, Virginia Tech
% for academic use only

% converts an vector of integer into a matrix; the i-th row is the binary form 
% of m bits for the i-th integer

for j = 1:length( int_state )   % length(int_state)?=max_state?  --yzh
   for i = m:-1:1
       state(j,m-i+1) = fix( int_state(j)/ (2^(i-1)) );     % FIX(X) rounds the elements of X to the nearest integers towards zero.  --yzh
       int_state(j) = int_state(j) - state(j,m-i+1)*2^(i-1);    % remain of mod 2^(i-1), the leftmost bit is most significant  -yzh
   end
end

bin_state = state;