checksum.m

LDPC codes .Using the matlab.

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function check_sum = CheckSum(codeword, checkMatrix_H)
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% @author   Andreas Waadt, 13. November 2005
% @param     codeword : the (received) codeword, which is checked
%           checkMatrix_H : the parity check matrix of the code
% @return   check_sum : the binary check sum vector
% This function calculates the checksum for a given codeword 
% and a Parity-Check-Matrix H (checkMatrix_H).
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check_sum = mod( codeword*checkMatrix_H', 2);

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