Patent ID: 8291289

Claim:
A transceiver, comprising: an LDPC encoder operable to apply the following expanded parity check matrix to input data to generate encoded data: 61 75 4 63 56 - 1 - 1 - 1 - 1 - 1 - 1 8 - 1 2 17 25 56 74 77 20 - 1 - 1 - 1 64 24 4 67 - 1 7 - 1 - 1 - 1 28 21 68 10 7 14 65 - 1 - 1 - 1 23 - 1 - 1 - 1 75 - 1 48 38 43 78 76 - 1 - 1 - 1 - 1 5 36 - 1 15 72 - 1 - 1 40 2 53 25 - 1 52 62 - 1 20 - 1 - 1 44 - 1 - 1 - 1 - 1 69 23 64 10 22 - 1 21 - 1 - 1 - 1 - 1 - 1 68 23 29 - 1 12 0 68 20 55 61 - 1 40 - 1 - 1 - 1 52 - 1 - 1 - 1 44 58 8 34 64 78 - 1 - 1 11 78 24 - 1 - 1 - 1 - 1 - 1 58 â¢ 1 0 - 1 - 1 - 1 - 1 - 1 - 1 - 1 0 0 - 1 - 1 - 1 - 1 - 1 - 1 - 1 0 0 - 1 - 1 - 1 - 1 - 1 - 1 - 1 0 0 - 1 - 1 - 1 0 - 1 - 1 - 1 0 0 - 1 - 1 - 1 - 1 - 1 - 1 - 1 0 0 - 1 - 1 - 1 - 1 - 1 - 1 - 1 0 0 1 - 1 - 1 - 1 - 1 - 1 - 1 0 wherein âˆ’1 represents an 81Ã—81 all-zero square matrix, and any other integer, s ij , represents an 81Ã—81 identity matrix circularly right shifted by a shift amount equal to the integer value of s ij ; a channel encoder operable to channel encode the encoded data; a modulator operable to modulate the channel encoded data onto a carrier; a transmitter operable to transmit the modulated channel encoded data over a transmission medium; a receiver operable to receive modulated channel encoded data from the transmission medium; a demodulator operable to demodulate the received modulated channel encoded data; a channel decoder operable to channel decode the demodulated channel encoded data; and an LDPC decoder operable to apply said expanded parity check matrix to the channel decoded data to generate decoded data.