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 channel encoding in a communications system, the programming instructions, when executed by the processor, causing the processor to:
• encode an input sequence by using a low density parity check (LDPC) matrix to obtain a bit sequence D, wherein the input sequence is control information or data information to be sent from a terminal to a base station of the communications system, wherein a base matrix of the LDPC matrix is represented by a matrix of m rows and n columns, wherein each column corresponds to a group of Z continuous bits in the bit sequence D, and wherein both n and Z are integers greater than 0;
• obtain a bit sequence V by permuting groups of bits corresponding to at least two parity check columns in the bit sequence D, wherein the at least two parity check columns are at least two columns of a column (n−m) to a column (n−1) of the base matrix, wherein a group j of Z continuous bits in the bit sequence V are a group P(j) of Z continuous bits in the bit sequence D, and wherein j is an integer that is smaller than n and greater than or equal to 0;
• and
• obtaining an output bit sequence based on the bit sequence V.