Parallel low intensity parity code encoding method and encoding apparatus

Abstract

The invention relates to a method for low-density parity check code parallel code, which is used to code the transmitted bit sequence s to attain the code letter c, while the code c is divided into two parts as information bit and the check bit. Wherein, c=[sT, cK+1, ..., cK]; the information bit and the check bit are grouped by z bits and marked as: s=[v(0)T, v(1)T, ..., v(kb-1)T] T [cK+1, ..., cN] T=[u(0)T, u(1)T, ..., u(mb-1)T]T; and the used check matrix H is the right formula. The method comprises: 1, calculating the row hm(j) of said matrix, while the x is preset; 2, (mb-1) paths parallel receive the transmitted bit sequence s; while each path uses relative hm(j), and calculating relative check bit. The invention also provides a code device. The invention can reduce the time delay inthe process of low-density parity check code parallel code.

Description

technical field [0001] The invention relates to the technical field of data transmission, in particular to a low-density parity-check code parallel encoding method and an encoding device. Background technique [0002] In order to improve the reliability of data transmission in the wireless communication environment and combat possible errors during data transmission, modern communication systems usually use a certain forward error correction code (FEC) to encode the transmitted data. In early voice communication systems, due to the relatively strong tolerance to transmission errors and high real-time requirements, convolutional coding with simple coding and decoding is generally used. However, in the data transmission system, higher requirements are put forward for the error correction capability. Simple convolutional coding is already difficult to meet the requirements of data transmission. Forward error correction with stronger error detection and error correction capabili...

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Problems solved by technology

[0037] However, it can be seen from the above formulas (10) (11) that the disadvantage of this encoding method is that the determination of the parity bits in the encoding process is serially calculated bit by bit (block), and the latter parity bit It must be calculated after the previous digit is determined

The above serial coding structure will inevitably introduce too much coding delay in the coding process of the long low-density parity-check code

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