摘要:
A method for decoding a non-binary Low Density Parity Check (LDPC) code by a decoding apparatus in a communication system is provided. The method includes selecting a predetermined number of symbol messages from among received symbol messages, performing a variable node update process on the selected symbol messages to generate variable node updated symbol messages, performing a check node update process on the variable node updated symbol messages, and performing a decoding operation based on the result of the variable node update process and the check node update process, wherein the performing of the check node update process includes generating an intermediate message for the variable node updated symbol messages using symbol messages which are selected based on reliability, and generating an output message of each edge between a variable node and a check node.
摘要:
A list decoding method for a polar code includes generating a tree-type decoding graph for input codeword symbols; the generating a tree-type decoding graph including, generating a decoding path list to which a decoding edge is added based on a reliability of a decoding path, the decoding path list being generated such that, among decoding paths generated based on the decoding edge, decoding paths within a threshold number of critical paths survive within the decoding path list in an order of high likelihood probability, and determining an estimation value, which corresponds to a decoding path having a maximum likelihood probability from among decoding paths of the decoding path list, as an information word.
摘要:
A system and method for processing a block Low Density Parity Check (LDPC) code are provided. The system includes, a decoding apparatus for decoding a block LDPC code using a parity check matrix, the parity check matrix including an information part and a parity part, the parity part including a first section (B) including a plurality of first permutation matrices, a second section (D) including a second permutation matrix, a third section (T) including a plurality of identity matrices (I) arranged diagonally within the third section and a plurality of third permutation matrices arranged below the plurality of identity matrices, and a fourth section (E) including a fourth permutation matrix.
摘要:
A method and an apparatus for performing a Superposition Coded Modulation (SCM) scheme in a broadcasting or communication system including a controller are provided. The method includes controlling an SCM coefficient by the controller. The SCM coefficient is controlled according to a channel capacity of each layer of one or more layers in which information included in a signal is encoded.
摘要:
A method of decoding a non-binary Low Density Parity Check (LDPC) code is provided. The method includes a plurality of messages to perform hard decision for all messages except for one message, and combines the hard-decided values with the one message that is not hard-decided, to update a final output message.
摘要:
A method and an apparatus for performing a Superposition Coded Modulation (SCM) scheme in a broadcasting or communication system including a controller are provided. The method includes controlling an SCM coefficient by the controller. The SCM coefficient is controlled according to a channel capacity of each layer of one or more layers in which information included in a signal is encoded.
摘要:
A method and an apparatus for performing a Superposition Coded Modulation (SCM) scheme in a broadcasting or communication system including a controller are provided. The method includes controlling an SCM coefficient by the controller. The SCM coefficient is controlled according to a channel capacity of each layer of one or more layers in which information included in a signal is encoded.