Abstract: A 5th generation (5G) or pre-5G communication system for supporting a data transmission rate higher than that of a 4th generation (4G) communication system such as long term evolution (LTE) is disclosed. The present disclosure relates to a rate compatible low-density parity-check (RC-LDPC) encoding method and device therefor. The encoding method includes using LDPC in a communication system, including the operations of LDPC encoding information bits by a first encoding rate, and performing a concatenated single parity check (SPC) encoding for the encoded bits by at least one second encoding rate lower than the first encoding rate.

Abstract: 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 a long term evolution (LTE). A method and apparatus for transmitting a signal in a transmitting apparatus in a communication system supporting a rate compatible-low density parity check (RC-LDPC) code are provided. The method includes encoding information bits based on a first parity check matrix and a first code rate to generate a codeword, processing the codeword to generate a transmission signal, and transmitting the transmission signal.

Abstract: Methods and apparatuses are provided for transmitting signaling information by a transmitting apparatus in a broadcasting system. A controller generates a codeword by encoding information bits of the signaling information. The codeword includes the information bits and parity bits. The controller punctures one or more of the parity bits to generate a punctured codeword. The controller generates a plurality of frames. The plurality of frames include a first frame including at least a part of the punctured codeword and a second frame including at least one additional parity bit for the signaling information. A transmitter transmits the plurality of frames. The at least a part of the punctured codeword is included in a preamble part of the first frame and the at least one additional parity bit is included in a preamble part of the second frame.

Abstract: A method and an apparatus are provided for transmitting and receiving signaling information in a digital broadcasting system. The method includes encoding first signaling information for a physical layer to generate a first coded block; encoding second signaling information to generate a second coded block; and transmitting a frame including the first coded block, the second coded block, and at least one physical layer pipe (PLP) data. The first signaling information has a fixed number of bits, and the second signaling information has a variable number of bits. The first signaling information includes information indicating a forward error correction (FEC) type of the second signaling information for receiving the second information, and the second signaling information includes information indicating a modulation scheme used for a related PLP data.

Abstract: A method is provided for channel encoding in a communication system using an LDPC code. The method includes encoding input bits using a BCH code, shortening bits of the encoded input bits according to a number of bit groups to be shortened and an order among a plurality of orders according to which the bit groups are shortened, wherein the number of bit groups to be shortened is based on a number of bits to be shortened, which is based on a number of the encoded input bits, encoding information bits including the encoded input bits and the shortened one or more bits, using an LDPC code to generate parity bits, puncturing bits in the parity bits based on a puncturing parameter among puncturing parameters, and transmitting a signal generated from the encoded information bits based on the punctured bits. The plurality of orders being based on the puncturing parameters and including first and second orders.

Abstract: A method and an apparatus are provided for transmitting and receiving signaling information in a digital broadcasting system. First signaling information for a physical layer is encoded to generate a first coded block. Second signaling information is encoded to generate a second coded block. A frame including the first coded block, the second coded block and at least one physical layer pipe (PLP) data is transmitted. The first signaling information has a fixed number of bits. The second signaling information has a variable number of bits. The first signaling information includes information indicating a forward error correction (FEC) type of the second signaling information for receiving the second information. The second signaling information includes information indicating an FEC type used for a related PLP data.

Abstract: A method is provided for channel encoding in a communication system using a Low-Density Parity Check (LDPC) code. The method includes grouping information bits into a plurality of groups, determining an order of the plurality of groups to be shortened, according to a code rate, determining a length of information bits to be obtained by shortening the plurality of groups, shortening the plurality of groups on a group basis in the determined order, based on the determined length of the information bits, and LDPC-encoding shortened information bits.

Abstract: 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 a long term evolution (LTE). A method includes decoding a codeword corresponding to a preset decoding scheme to detect reliability information of each of codeword bits included in the codeword, wherein at least one of a number of quantization bits and a range of a quantization level used for detecting reliability information in the decoding scheme is determined based on a degree of a node on a bipartite graph of a low density parity check (LDPC) code.

Abstract: The present disclosure relates to a 5G or pre-5G communication system for supporting a higher data transmission rate beyond the 4G communication system such as LTE. A decoding method using a polar code according to an embodiment of the present disclosure comprises the steps of: determining a first function for decoding input bits and a second function, which is independent from a log likelihood ratio (LLR) value of a previous input bit by the first function; and decoding the input bits in parallel using the first function and the second function. Also, the method comprises the steps of: determining an internal frozen bit using at least one input frozen bit which has a predetermined value of a predetermined position from among the input bits; and determining LLR values for layer bits sequentially from the higher layers of N layers.

Abstract: Methods and apparatuses are provided for transmitting signaling information by a transmitting apparatus in a broadcasting system. A controller generates a codeword by encoding information bits of the signaling information. The codeword includes the information bits and parity bits. The controller punctures one or more of the parity bits to generate a punctured codeword. The controller generates a plurality of frames. The plurality of frames include a first frame including at least a part of the punctured codeword and a second frame including at least one additional parity bit for the signaling information. A transmitter transmits the plurality of frames. The at least a part of the punctured codeword is included in a preamble part of the first frame and the at least one additional parity bit is included in a preamble part of the second frame.

Abstract: Methods and apparatuses are provided for transmitting data. A codeword is generated by encoding an information word. Parity bits of the codeword are grouped into a plurality of groups. The parity bits are interleaved according to a predetermined order. One or more of the interleaved parity bits are punctured to generate a punctured codeword. A frame including a portion of the punctured codeword is transmitted.

Abstract: A method and apparatus are provided for transmitting and receiving signaling information in a digital broadcasting/communication system. A method for transmitting the signaling includes encoding signaling information for a physical layer to generate at least one coded block; and transmitting a frame comprising the at least one coded block.

Abstract: A 5th generation (5G) or pre-5G communication system for supporting a data transmission rate higher than that of a 4th generation (4G) communication system such as long term evolution (LTE) is disclosed. The present disclosure relates to a rate compatible low-density parity-check (RC-LDPC) encoding method and device therefor. The encoding method includes using LDPC in a communication system, including the operations of LDPC encoding information bits by a first encoding rate, and performing a concatenated single parity check (SPC) encoding for the encoded bits by at least one second encoding rate lower than the first encoding rate.

Abstract: 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 a long term evolution (LTE). A method and apparatus for transmitting a signal in a transmitting apparatus in a communication system supporting a rate compatible-low density parity check (RC-LDPC) code are provided. The method includes encoding information bits based on a first parity check matrix and a first code rate to generate a codeword, processing the codeword to generate a transmission signal, and transmitting the transmission signal.

Abstract: Fifth Generation (5G) or pre-5G communication system for supporting a data transfer rate higher than that of a fourth Generation (4G) communication system, such as Long Term Evolution (LTE), and subsequent systems. The present disclosure provides a method for transmitting a signal by a transmission terminal in a communication system using a Low Density Parity Check (LDPC) code. The method include receiving a change request for changing a coding rate of the LDPC code, from a reception terminal; determining a first coding rate based on the change request; and transmitting information on the first coding rate in respond to the change request, to a reception terminal, wherein the change request for changing the coding rate comprises at least one of information indicating a coding rate determined by the reception terminal, or information indicating a state of the reception terminal.

Abstract: A method and apparatus for transmitting and receiving a preamble having sequence information for an OFDM system is provided. The preamble transmission method includes generating a preamble block including at least one frame having a header with a known sequence and a code block containing control information and transmitting the preamble block mapped to Orthogonal Frequency Division Multiplexing (OFDM) cells by repeating in frequency axis direction.

Abstract: 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 a long term evolution (LTE). A method includes decoding a codeword corresponding to a preset decoding scheme to detect reliability information of each of codeword bits included in the codeword, wherein at least one of a number of quantization bits and a range of a quantization level used for detecting reliability information in the decoding scheme is determined based on a degree of a node on a bipartite graph of a low density parity check (LDPC) code.

Abstract: A channel encoding method in a communication or broadcasting system is provided. The channel encoding method includes reading a first sequence corresponding to a parity check matrix, converting the first sequence to a second sequence by applying a certain rule to a block size corresponding to a parity check matrix and the first sequence, and encoding information bits based on the second sequence. The block size has at least two different integer values.

Abstract: An apparatus and method for configuring a broadcast service data in a digital broadcasting communication system are provided. The method includes mapping a first zone, corresponding to broadcast service data of a first type, and a second zone, corresponding to broadcast service data of a second type, in a frame individually. Preferably, the broadcast service data included in the first zone and the second zone is sliced into sub-slices according to a different number of service slicings for each zone.

Abstract: Apparatus and method for receiving a frame including control information in a broadcasting system are provided. A frame for a broadcast service is received and includes at least one Physical Layer Pipe (PLP) and indication information for indicating a change/no-change of control information for the broadcast service in the next frame. Indication information, which includes information on a position in which the control information will change, is extracted from the frame and used to determine the position in which the control information will change.