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 LDPC are provided to generate a LDPC code having different code word length using information of a given parity check matrix. CONSTITUTION: A demodulator(930) demodulates a received signal. A reduced pattern determination unit determines a location of reduced information bit. An LDPC decoder(940) decodes a decoded signal by considering the position of determined reduced information bit. The reduced pattern determination unit determines a position of the reduced information bit and determines the number of the reduced information bits. The reduced pattern determination unit determines the number of reduced bit groups based on the number of the reduced information bits and obtains an order of predetermined bit groups. [Reference numerals] (1020) Reduced/punched pattern determination or estimation unit; (910) Control unit; (930) Demodulator; (940) LDPC decoder