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

摘要

A method for a channel encoding in a communication system using a Low-Density Parity Check (LDPC) code. The method includes dividing information bits into a plurality of bit 5 groups; determining a number of information bits to be shortened; determining a number of bit groups to be shortened based on the determined number of information bits to be shortened; shortening information bits in the determined number of bit groups according to a predetermined order; and LDPC encoding shortened information bits. 3MO939_1 (GHMaters) P84002.AU.I READ COLUMN GROUP INFORMATION OF DVB-S2 LDPC CODE TO BE 601 SUBJECTED TO SHORTENING DETERMINE CODE LENGTH N2 AND INFORMATION LENGTH K2 603 OF SHORTENED LDPC CODE DETERMINE VALUE A60 ACCORDING TO SHORTENING STEP 1 605 SELECT INFORMATION ON (A+1) COLUMN GROUPS 607 ACCORDING TO SHORTENING STEP 2 GENERATE SHORTENED LDPC CODE USING DVB-82 LDPC CODE GENERATION METHOD 609 ACCORDING TO SHORTENING STEP 3 GENERATE FINAL LDPC CODE BY APPLYING ADDITIONAL SHORTING 611 ACCORDING TO SHORTENING STEP 4 APPLY PUNCTURING IN LDPC ENCODING 61 PROCESS WHEN PUNCTURING IS NEEDED 613