Method and apparatus for interleaving low density parity check (LDPC) codes over mobile satellite channels

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United States of America Patent

PATENT NO 8650450
APP PUB NO 20090172492A1
SERIAL NO

12221363

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Abstract

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Systems, methods and apparatus are described to interleave LDPC coded data for reception over a mobile communications channel, such as, for example, a satellite channel. In exemplary embodiments of the present invention, a method for channel interleaving includes segmenting a large LDPC code block into smaller codewords, randomly shuffling the code segments of each codeword and then convolutionally interleaving the randomly shuffled code words. In exemplary embodiments of the present invention, such random shuffling can guarantee that no two consecutive input code segments will be closer than a defined minimum number of code segments at the output of the shuffler. In exemplary embodiments of the present invention, by keeping data in, for example, manageable sub-sections, accurate SNR estimations, which are needed for the best possible LDPC decoding performance, can be facilitated based on, for example, iterative bit decisions.

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Patent Owner(s)

Patent OwnerAddress
SIRIUS XM RADIO INC1221 AVENUE OF THE AMERICAS NEW YORK NY 10020

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Scarpa, Carl Plainsboro, US 46 239
Schell, Edward Jackson, US 33 84

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