Method and apparatus for channel encoding and decoding in a communication system using low-density parity-check codes

摘要

A method for channel decoding using a Low-Density Parity-Check (LDPC) code, the method comprising: demodulating a signal transmitted from a transmitter; 5 determining position information of the punctured parity bits by estimating information about a predetermined order of parity bit sets to be punctured and the number of parity bit sets ; and decoding data using the position information of the punctured parity bits, wherein determining position of punctured parity bits comprises: determining a number of parity bits to be punctured; determining a number of parity bit sets to be punctured 10 based on the determined number of parity bits to be punctured; and acquiring a predetermined order of parity bit sets, wherein the predetermined order of parity bit sets is 6, 4, 18, 9, 13, 8, 15, 20, 5, 17, 2, 24, 10, 22, 12, 3, 16, 23, 1, 14, 0, 21, 19, 7, 11, when a codeword length is 16200. DETERMINE OR ESTIMATE PUNCTURING/SHORTENING 1001 PATTERNS FROM RECEIVED SIGNAL ANY PUNCTURED! NO SHORTENED BITS? DELIVER PUNCTURING/SHORTENING F PATTERNS TO LDPC DECODER 1005 SET DETERMINE THAT PUNCTURED BIT IS ERASURE BIT AND SET DETERMINE THAT 1007 PROBABILITY THAT VALUE OF SHORTENED BIT WILL BE 0 IS I DECODING 1009 (..JND