This application discloses an information processing method and apparatus, a communications device, and a communications system. The method includes: encoding an input sequence by using a low density parity check LDPC matrix to obtain a bit sequence D, where a base matrix of the LDPC matrix is represented by a matrix of m rows and n columns, each column corresponds to a group of Z continuous bits in the bit sequence D, and both n and Z are integers greater than 0; and obtaining an output bit sequence based on a bit sequence V, where the bit sequence V is obtained by permuting groups of bits corresponding to at least two parity check columns in the bit sequence D.

The present invention related to a 5G or pre-5G communication system to be provided to support a higher data transmission rate since 4G communication systems like LTE. The present invention relates to a method and an apparatus for encoding a channel in a communication or broadcasting system supporting parity-check matrices having various sizes are provided. The method for encoding a channel includes determining a block size of the parity-check matrix; reading a sequence for generating the parity-check matrix, and transforming the sequence by applying a previously defined operation to the sequence based on the determined block size.

This application discloses an information processing method and apparatus, a communications device, and a communications system. The method includes: encoding an input sequence by using a low-density parity-check (LDPC) matrix, to obtain a bit sequence D, where 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 obtaining an output bit sequence based on a bit sequence V, where the bit sequence V is obtained by permuting two groups of bits corresponding to at least two parity check columns in the bit sequence D.

A processor of an apparatus selects a codebook from a plurality of codebooks embedded in a quasi-cyclic-low-density parity-check (QC-LDPC) code. The processor stores the selected codebook in a memory associated with the processor. The processor also encodes data using the selected codebook to generate a plurality of modulation symbols of the data. The processor further controls a transmitter of the apparatus to multiplex, convert, filter, amplify and radiate the modulation symbols as electromagnetic waves through one or more antennas of the apparatus. In selecting the codebook from the plurality of codebooks embedded in the QC-LDPC code, the processor selects the codebook according to one or more rules such that a small codebook requiring a shorter amount of processing latency for the encoding is selected for the encoding unless a larger codebook corresponding to a larger amount of processing latency for the encoding is necessary for the encoding.

Disclosed relates to a decoder for LDPC code, including: a variable node processing unit; a check node processing unit; a memory for storing iterative messages of edges of a parity-check matrix for LDPC code; and a controller for controlling the node processing units to perform iterations of decoding until the decoding ends, wherein, in each iteration of decoding, the controller controls the variable node processing unit to compute variable node messages in a traversing manner for all variable nodes and updates the iterative messages in the memory according to the computed variable node messages, and controls the check node processing unit to compute check node messages in a traversing manner for all check nodes and updates the iterative messages in the memory according to the computed check node messages.

The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). A channel encoding method in a communication or broadcasting system includes identifying an input bit size, determining a block size (Z), determining an LDPC sequence for LDPC encoding, and performing the LDPC encoding based on the LDPC sequence and the block size.

Disclosed is a method of wireless communication. The method is performed at a first wireless node. The method comprises: obtaining a sequence of bits to be encoded, selecting a puncturing pattern from a plurality of puncturing patterns, generating, based on the sequence of bits to be encoded, a sequence of parity bits in accordance with a binary linear block coding scheme, puncturing, based on the selected puncturing pattern, at least one of the sequence of bits to be encoded or the sequence of parity bits, generating a plurality of modulation symbols based on remaining bits in the sequence of bits to be encoded and based on remaining bits in the sequence of parity bits, and transmitting, to a second wireless node, the plurality of modulation symbols.

This application discloses a method and an apparatus for processing information, a communications device, and a communications system. The communications device is configured to obtain a starting position of an output bit sequence in a coded block in a circular buffer, and determine the output bit sequence in the coded block based on a length of the output bit sequence and the starting position. A value of the starting position is one of {p.sub.0, p.sub.1, p.sub.2 . . . , p.sub.k.sub.max.sub.1}, where 0p.sub.k<N.sub.CB, p.sub.k is an integer, k is an integer, 0k<k.sub.max, N.sub.CB is a size of the coded block, and k.sub.max is an integer greater than or equal to 4. Because a bit sequence for an initial transmission or a retransmission is properly determined, decoding performance of a communications device at a receive end after receiving the bit sequence is improved, a decoding success rate is improved, and a quantity of retransmissions is further reduced.

The present invention related to a 5G or pre-5G communication system to be provided to support a higher data transmission rate since 4G communication systems like LTE. The present invention relates to a method and an apparatus for encoding a channel in a communication or broadcasting system supporting parity-check matrices having various sizes are provided. The method for encoding a channel includes determining a block size of the parity-check matrix; reading a sequence for generating the parity-check matrix, and transforming the sequence by applying a previously defined operation to the sequence based on the determined block size.

The present invention related to a 5G or pre-5G communication system to be provided to support a higher data transmission rate since 4G communication systems like LTE. The present invention relates to a method and an apparatus for encoding a channel in a communication or broadcasting system supporting parity-check matrices having various sizes are provided. The method for encoding a channel includes determining a block size of the parity-check matrix; reading a sequence for generating the parity-check matrix, and transforming the sequence by applying a previously defined operation to the sequence based on the determined block size.