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US 7,802,172 B2Granted
Variable-rate low-density parity check codes with constant blocklength
AssigneesSTMicroelectronics S.r.l., The Regents of the University of California
InventorsAndres I. Vila Casado, Wen-Yen Weng, Richard D. Wesel, Nicola Moschini, Massimiliano Siti, Stefano Valle, Engling Yeo
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Abstract
Low density parity check (LDPC) codes (LDPCCs) have an identical code blocklength and different code rates. At least one of the rows of a higher-rate LDPC matrix is obtained by combining a plurality of rows of a lower-rate LDPC matrix with the identical code blocklength as the higher-rate LDPC matrix.
Claims36
A data transmission apparatus, comprising:
- a low density parity check (LDPC) code (LDPCC) coder for coding a plurality of codes having various rates, wherein the plurality of codes have an identical code blocklength and different code rates, and at least one row of a higher-rate LDPC matrix is obtained by combining a plurality of rows of a lower-rate LDPC matrix with the identical code blocklength as the higher-rate LDPC matrix.
A method of data transmission, comprising:
- coding a plurality of codes having various rates using a low density parity check (LDPC) code (LDPCC) coder, wherein the plurality of codes have an identical code blocklength and different code rates, and at least one row of a higher-rate LDPC matrix is obtained by combining a plurality of rows of a lower-rate LDPC matrix with the identical code blocklength as the higher-rate LDPC matrix.
Dependencies are inferred from the claim text.