METHOD AND SYSTEM FOR PROVIDING SHORT-BLOCK LENGTH LOW DENSITY PARITY CHECK (LDPC) CODE IN SUPPORT OF BROADBAND SATELLITE APPLICATION

摘要

PROBLEM TO BE SOLVED: To provide an approach for encoding a short-frame length low density parity check (LDPC) code. SOLUTION: An encoder (203) generates a LDPC code having an outer Bose Chaudhuri Hocqenghem (BCH) code. Structure is imposed on the LDPC code by restricting a portion of the parity check matrix to be lower triangular and/or satisfying other requirements such that communication between bit nodes and check nodes of a decoder (305) is simplified. Further, a cyclic redundancy check (CRC) encoder (209) is supplied to encode the input signal according to a CRC code. This approach has particular application in digital video broadcast services over a satellite. COPYRIGHT: (C)2005,JPO&NCIPI