Structured low-density parity-check (LDPC) code

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United States of America Patent

PATENT NO RE49225
SERIAL NO

16938158

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id='REI-00001' date='20220927' 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.id='REI-00001' id='REI-00002' date='20220927' System and method for operating a wireless device to encode data using low-density parity-check (LDPC) encoding is discussed. One example method includes: computing a number of modulated orthogonal frequency-division multiplexing (OFDM) symbols for transmitting the data; computing a number of shortening bits; distributing the number of shortening bits over the at least one LDPC codeword; computing a number of puncturing bits for the at least one LDPC codeword; distributing the number of puncturing bits over the at least one LDPC codeword; determining a criterion using at least one of the number of shortening bits and the number of puncturing bits; if the criterion is met, increasing the number of modulated OFDM symbols and recalculating the number of puncturing bits; generating the encoded data using the number of shortening bits, the number of puncturing bits, and the at least one LDPC codeword; and transmitting the encoded data.id='REI-00002'

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MALIKIE INNOVATIONS LIMITED92 GEORGES STREET LOWER THE GLASSHOUSES GH2 DUN LAOGHAIRE DUBLIN A96 VR66

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Burns, Nina K Clarksville, US 2 222
Chaudhry, Muhammad Gaithersburg, US 7 326
Livshitz, Michael Rockville, US 21 517
Purkovic, Aleksandar Potomac, US 20 532
Sukhobok, Sergey Rockville, US 12 417

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