Information processing method and communications apparatus

An apparatus, comprising:

• a processor;
• and
• a non-transitory computer-readable storage medium coupled to the processor and storing programming instructions for execution by the processor, the programming instructions instruct the processor to:
• encode an input sequence by using a low-density parity-check LDPC matrix, to obtain a bit sequence D, wherein a base matrix of the LDPC matrix is represented as a matrix of m rows and n columns, each column corresponds to a group of Z consecutive bits in the bit sequence D, and n and Z are both integers greater than 0;
• and
• obtain an output bit sequence based on a bit sequence V, wherein the bit sequence V is obtained by permuting at least two groups of bits corresponding to at least two parity check columns in the bit sequence D, the at least two parity check columns are at least two of column (n−m) to column (n−1) of the base matrix, group j of Z consecutive bits in the bit sequence V is group P(j) of Z consecutive bits in the bit sequence D, j is an integer, and 0≤j<n.