Structured low-density parity-check (LDPC) code

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United States of America Patent

PATENT NO RE46692
SERIAL NO

14527483

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Abstract

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A method for constructing a low-density parity-check (LDPC) code using a structured base parity check matrix with permutation matrix, pseudo-permutation matrix, or zero matrix as constituent sub-matrices; and expanding the structured base parity check matrix into an expanded parity check matrix. A method for constructing a LDPC code using a structured base parity check matrix H=[Hd|Hp], Hd is the data portion, and Hp is the parity portion of the parity check matrix; the parity portion of the structured base parity check matrix is such so that when expanded, an inverse of the parity portion of the expanded parity check matrix is sparse; and expanding the structured base parity check matrix into an expanded parity check matrix. A method for encoding variable sized data by using the expanded LDPC code; and applying shortening, puncturing.

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Patent Owner(s)

  • BLACKBERRY LIMITED

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Burns, Nina Columbia, US 7 365
Chaudhry, Muhammad Gaithersburg, US 7 314
Livshitz, Michael Rockville, US 20 487
Purkovic, Aleksandar Potomac, US 20 499
Sukhobok, Sergey Rockville, US 12 404

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