multfromrx.m

在matlab中

function M = multFromRx(rxword,m)

% M = multFromRx(rxword,m)
%
% Generate multiplicity matrix from received codeword.  Arguments
% are the received vector and the exponent m of the field GF(2^m)
% in which the vector's elements lie.  The order of elements for
% the rows is 0,1,2,... in binary representation and for the
% columns it is the power order of alpha.

M = zeros(2^m,2^m-1);
n = 2^m - 1;

for i=0:n
   Js = find(rxword==i);
   for j=Js
     M(i+1,j) = 1;
   end
end