QC-LDPC Coding Methods And Apparatus

A method, comprising:

• generating, by a processor of an apparatus, a quasi-cyclic-low-density parity-check (QC-LDPC) code;
• encoding, by the processor, data using the QC-LDPC code;
• and
• transmitting, by the processor via a transceiver of the apparatus, the encoded data to another apparatus,
• wherein the QC-LDPC code comprises a plurality of codebooks embedded therein,
• wherein the encoding of the data using the QC-LDPC code comprises:
• selecting a codebook from the plurality of codebooks such that a small codebook is selected for encoding unless a larger codebook is necessary for the encoding;
• and
• encoding the data using the selected codebook,
• wherein the generating of the QC-LDPC code further comprises:
• generating a respective table of shift values for each lifting factor of a first set of lifting factors;
• and
• optimizing the first set of lifting factors to produce a second set of lifting factors,
• wherein a number of lifting factors of the first set is greater than a number of lifting factors of the second set,
• wherein a first lifting factor that exists in the first set but not in the second set shares a respective table of shift values of a second lifting factor that exists in both the first set and the second set, and
• wherein the second lifting factor is smaller than the first lifting factor in value and closest to the first lifting factor than other lifting factors in the first set.

A method, comprising:

• generating, by a processor of an apparatus, a quasi-cyclic-low-density parity-check (QC-LDPC) code that comprises at least one quasi-row orthogonal layer;
• encoding, by the processor, data using the QC-LDPC code;
• and
• transmitting, by the processor via a transceiver of the apparatus, the encoded data to another apparatus,
• wherein the QC-LDPC code comprises a plurality of codebooks embedded therein, and
• wherein the encoding of the data using the QC-LDPC code comprises:
• selecting a codebook from the plurality of codebooks such that a small codebook is selected for encoding unless a larger codebook is necessary for the encoding;
• and
• encoding the data using the selected codebook.

A method, comprising:

• generating, by a processor of an apparatus, a quasi-cyclic-low-density parity-check (QC-LDPC) code that comprises a kernel matrix that corresponds to a code rate of at least a threshold value;
• encoding, by the processor, data using the QC-LDPC code;
• and
• transmitting, by the processor via a transceiver of the apparatus, the encoded data to another apparatus,
• wherein the kernel matrix comprises a plurality of rows and a plurality of columns of bits, wherein two or more of the columns comprise punctured columns having a specific pattern of bits,
• wherein the QC-LDPC code comprises a plurality of codebooks embedded therein, and
• wherein the encoding of the data using the QC-LDPC code comprises:
• selecting a codebook from the plurality of codebooks such that a small codebook is selected for encoding unless a larger codebook is necessary for the encoding;
• and
• encoding the data using the selected codebook.