Low-density parity check (LDPC) decoders using partial syndrome early termination

An apparatus comprising:

• a receiver configured to receive a signal comprising low-density parity-check (LDPC) encoded data and generate log likelihood ratio (LLR) values corresponding to the LDPC encoded data;
• and
• one or more processors configured to:
• identify a number of punctured parity bits corresponding to the LDPC encoded data;
• determine that the number of punctured parity bits is less than a threshold;
• determine, using the LLR values and a first parity check matrix corresponding to the LDPC encoded data, a first value indicating whether there is an error in the LLR values, by removing contributions of the punctured parity bits to the first parity check matrix;
• and
• determine, using the first value, that there is an error in the LLR values.

A method comprising:

• receiving, by a receiver, a signal comprising low-density parity-check (LDPC) encoded data and generating log likelihood ratio (LLR) values corresponding to the LDPC encoded data;
• and
• identifying, by one or more processors, a number of punctured parity bits corresponding to the LDPC encoded data;
• determine, by the one or more processors, that the number of punctured parity bits is less than a threshold;
• removing, by the one or more processors from a first parity check matrix corresponding to the LDPC encoded data, one or more rows corresponding to the number of punctured parity bits to generate a second parity check matrix;
• determining, by the one or more processors using the LLR values and the second parity check matrix, that there is an error in the LLR values;
• and
• decoding, by an LDPC decoder based at least on the determination, the LLR values to resolve the error.