Method and system for providing long and short block length...

Details Method and system for providing long and short block length... Method and system for providing long and short block length...

H - Electricity

03

M

H03M 13/11 (2006.01) H03M 13/15 (2006.01) H03M 13/29 (2006.01) H04L 1/00 (2006.01)

Patent

CA 2486048

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 1/3 rate, the relevant parameters are as follows: q = 120, n ldpc = 64,800, k ldpc = n BCH = 21600, k BCH = 21408 (12 bit error correcting BCH). For 1/ 4 rate, the LDPC code has the following relevant parameters: q = 135, n ldpc = 64,800, k ldpc = n BCH = 16200, k BCH = 16008 (12 bit error correcting BCH). For 2/5 rate, the following parameters exist: q = 108, n ldpc = 64800, k ldpc = n BCH = 25920, k BCH = 25728 (12 bit error correcting BCH). The above approach has particular application in digital video broadcast services over satellite.

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