Method and system for providing reduced memory low density...

Details Method and system for providing reduced memory low density... Method and system for providing reduced memory low density...

H - Electricity

03

M

H03M 13/00 (2006.01) H03M 13/11 (2006.01) H03M 13/15 (2006.01) H03M 13/19 (2006.01) H04L 1/22 (2006.01) H04L 27/20 (2006.01) H04L 27/36 (2006.01)

Patent

CA 2486044

An approach is provided for generating Low Density Parity Check (LDPC) codes. An LDPC encoder (203) generates a LDPC code with an outer Bose Chaudhuri Hocquenghem (BCH) code. For a rate 315 code, the approach provides a degree profile that yields reduced memory requirements for storage of the edge values without significantly affecting the performance with respect to an "unmodified" rate 3/5 code. The relevant parameters for the reduced memory LDPC codes are as follows: q= 72, n/dpc = 64800, k idpc = n BCH = 38880, k BCH = 38688. The above approach has particular application in digital video broadcast services over satellite.

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