IRA-LDPC (irregular repeat-accumulate-low-density parity check) code construction method and encoder thereof

Abstract

The invention belongs to the technical field of wireless communication channel encoding, and particularly relates to a high-performance algebraic construction method of an IRA-LDPC (irregular repeat-accumulate-low-density parity check) code and a corresponding low-complexity fast encoder. The algebraic construction method comprises the following steps: constructing a method and an expression for a residual class pair array; designing a method and an expression for a first parameter of residual class pairs; designing a method and an expression for a second parameter of the residual class pairs; and constructing a method and an expression for calculating line coordinates of the location of each ''1'' element in a parity check matrix. The encoder comprises an encoder body structure module and a circuit, encoding-enabled signal generation module and a circuit, a signal generator sub-module and a circuit for parallel implementation of check position selection, a sub-module and a circuit for parallel implementation of check position calculation and storage, and an output module and a circuit for encoded data.

Description

technical field [0001] The invention belongs to the technical field of wireless communication channel coding, and in particular relates to an algebraic construction method of a high-performance IRA-LDPC code and a corresponding coder structure. The invention can be used as one of the best selection schemes of the physical layer forward error correction code in the long-term evolution (LTE) industrial standard of mobile communication, fixed wireless communication, satellite communication and space communication. Background technique [0002] The channel error correction code technology is mainly used to solve the problem of transmission reliability. The IRA-LDPC code involved in the present invention is a channel error correction code technology whose performance is close to the Shannon limit and can run at high speed. [0003] The LDPC code is essentially a linear block code, which is defined by the sparse parity check matrix H, and the code word sequence of the LDPC code ...

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Problems solved by technology

[0008] In order to overcome the shortcoming that the IRA-LDPC code adopted in the DVB-S2 standard needs a large amount of ROM space to store the code list, the invention provides a kind of construction method of the IRA-LDPC code, and the invention solves the problem that the IRA-LDPC code H d The storage space problem of the matrix, and the corresponding encoder hardware complexity is lower, the running speed is faster, and the simulation performance is also slightly superior, which can be better applied in the actual engineering of wireless communication

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