APPARATUS AND METHOD FOR CHANNEL ENCODING AND DECODING IN COMMUNICATION SYSTEM USING LOW-DENSITY PARITY-CHECK CODES

摘要

PURPOSE: A channel encoding/decoding method and a device thereof in a communication system using an LDPC code are provided to optimize encoding/decoding performance using information of a give parity check matrix and to generate an LDPC code having different code word length. CONSTITUTION: A demodulator(1630) demodulates a transmitted signal from a transmitter. A punch pattern estimator(1620) determines location information of a punched parity bit. An LDPC decoder(1640) decodes data using the location information of the punched parity bit. The location information of the punched parity bit determines the number of the punched parity bits and determines the number of punched parity bit groups based on the number of the punched parity bits. The location information of the punched parity bit is determined by an order of a predetermined punched parity bit groups. [Reference numerals] (1610) Control unit; (1620) Reduced/punched pattern determiner or estimator; (1630) Demodulator; (1640) LDPC decoder