Realization method of high-speed low density parity code (LDPC) decoder

Abstract

The invention provides a realization method of a high-speed low density parity code (LDPC) decoder. The method comprises the following steps that checking node information and variable node information are updated in a decoding process, numbers and filling formats of the checking node information and the variable node information which can be processed simultaneously are selected according to a row weight and a column weight satisfied according to a coding check matrix; the obtained checking node information and the variable node information are circularly shifted and rearranged, and rearranged data are processed by using a single instruction multiple data (SIMD)instruction, finally the updated checking node information and the variable node information are obtained. The realization method of the high-speed low density parity code (LDPC) decoder disclosed by the invention is short in design cycle, low in cost, easy to modify and extend, and further solves the problem of small throughput for realizing LDPC decoding and speeds up the decoding speed.

Description

technical field [0001] The invention belongs to the field of wireless communication channel coding, and relates to a method for realizing a decoder, in particular to a method for realizing a high-speed LDPC decoder. Background technique [0002] There are few reports and patents related to the realization of systems containing LDPC codes using virtual radio technology. The concept of virtual radio was proposed by V.Bose and others in 1999. Its goal is to replace special-purpose devices with the computing power of general-purpose computers to complete the digital signal processing process in wireless communication. Compared with the software radio based on the dedicated programmable device architecture, the virtual radio system has the characteristics of low development cost, short cycle, fast upgrade, and flexible configuration. It can support existing wireless networks of various modes, and can also support Future web models. [0003] The key point of the realization of t...

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Problems solved by technology

[0010] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a method for realizing a high-speed LDPC decoder junction, which is used to solve the problem of difficult modification and expansion of the LDPC decoder in the prior art, and the low throughput The problem

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