Patent ID: 7493548

Claim:
A method for operating a transmitter that generates parity-check bits p=(p 0 , . . . , p m−1 ) based on a current symbol set s=(s 0 , . . . , s k−1 ), the method comprising the steps of: receiving the current symbol set s=(s 0 , . . . , S k−1 ); using a matrix H to determine the parity-check bits wherein H is represented by H bm or a column or row permutation of the matrix H bm , where H bm = ⁢ 40 - - - 22 - 49 23 43 - - - 50 1 - - 48 35 - - 13 - 30 - 39 50 - - 4 - 2 - - - - 49 33 - - 38 37 - - 4 1 - - - 45 - - - 0 22 - - 20 42 - - 51 - - 48 35 - - - 44 - 18 - 47 11 - - - 17 - - 51 - - - 5 - 25 - 6 - 45 - 13 40 - - 33 - - 34 24 - - - 23 - - 46 1 - 27 - 1 - - - 38 - 44 - - 18 - - 23 - - 8 0 35 - - 49 - 17 - 30 - - - 34 - - 19 ⁢ ⁢ 1 0 - - - - - - - - - - - 0 0 - - - - - - - - - - - 0 0 - - - - - - - - - - - 0 0 - - - - - - - - - - - 0 0 - - - - - - - - - - - 0 0 - - - - - 0 - - - - - 0 0 - - - - - - - - - - - 0 0 - - - - - - - - - - - 0 0 - - - - - - - - - - - 0 0 - - - - - - - - - - - 0 0 1 - - - - - - - - - - 0 ; and transmitting the parity-check bits along with the current symbol set.