% -*- texinfo -*- % @deftypefn {Function File} {} egolaydec (@var{R}) % % Given @var{R}, the received Extended Golay code, this function tries to % decode @var{R} using the Extended Golay code parity check matrix. % Extended Golay code (24,12) which can correct upto 3 errors. % % The received code @var{R}, needs to be of length Nx24, for encoding. We can % decode several codes at once, if they are stacked as a matrix of 24columns, % each code in a separate row. % % The generator G used in here is same as obtained from the % function egolaygen. % % The function returns the error-corrected code word from the received % word. If decoding failed, the second return value is 1, otherwise it is 0. % % Extended Golay code (24,12) which can correct upto 3 % errors. Decoding algorithm follows from Lin & Costello. % % Ref: Lin & Costello, pg 128, Ch4, 'Error Control Coding', 2nd ed, Pearson. % % @example % @group % M=[rand(10,12)>0.5]; % C1=egolayenc(M); % C1(:,1)=mod(C1(:,1)+1,2) % C2=egolaydec(C1) % @end group % @end example % % @end deftypefn % @seealso{egolaygen,egolayenc}

Generated on Sat 16-May-2009 00:04:49 by