Ldpc code–based communication method and communication apparatus

A low-density parity-check (LDPC) code-based communication method, the method comprising:

• receiving an LDPC codeword sequence;
• and
• decoding the LDPC codeword sequence based on a first LDPC base matrix and indication information, wherein the indication information comprises first information, the first information indicates a plurality of row pairs, each row pair in the plurality of row pairs comprises a first row and a second row, a set of column numbers of columns in which non-zero elements in first x elements of the first row in the row pair are located is a proper subset of a set of column numbers of columns in which non-zero elements in first x elements of the second row in the row pair are located, and x is a positive integer;
• and the plurality of first rows indicated by the first information form one or more row groups, each row group in the one or more row groups comprises at least two of the first rows, a column weight of each column in a matrix region of the second rows corresponding to the at least two first rows is less than or equal to 2, and the at least two first rows have an association relationship.

A communication apparatus, comprising:

• a processor;
• and
• an interface circuit configured to:
• receive a signal from an other communication apparatus different than the communication apparatus and transmit the signal to the processor, or send a signal from the processor to the other communication apparatus different than the communication apparatus;
• and the processor is configured to:
• obtain information bit sequence;
• perform low density parity check (LDPC) encoding on the information bit sequence based on a first LDPC base matrix and indication information to obtain an LDPC codeword sequence, wherein the indication information comprises first information, the first information indicates a plurality of row pairs, each row pair in the plurality of row pairs comprises a first row and a second row, a set of column numbers of columns in which non-zero elements in first x elements of the first row in the row pair are located is a proper subset of a set of column numbers of columns in which non-zero elements in first x elements of the second row in the row pair are located, and x is a positive integer;
• and the plurality of first rows indicated by the first information form one or more row groups, each row group in the one or more row groups comprises at least two of the first rows, a column weight of each column in a matrix region formed by the second rows corresponding to the at least two first rows is less than or equal to 2, and the at least two first rows have an association relationship;
• and
• send the LDPC codeword sequence.