用于LDPC码快速译码的改进多比特翻转算法

An Improved Multi-bits Flipping Algorithm for High-Speed LDPC Decoding

为了提高RRWBF算法的译码速度,本文提出一种改进的多比特翻转机制加快IRRWBF算法的收敛速度。传统多比特翻转机制会导致IRRWBF算法,在译码过程中大量出现正确译码比特错误翻转的现象,进而影响LDPC码的译码性能。为此,本文提出一种单\多比特切换机制来消减传统多比特翻转译码过程中引入的错误翻转,进而在加快IRRWBF算法译码速度的同时,尽可能获得更优的译码性能。

In order to improve the decoding speed of the RRWBF algorithm,we propose a multiple-bits selection mechanism to accelerate the decoding convergence speed of the RRWBF algorithm.However,the RRWBF algorithm with the multiple-bits selection mechanism will appear the wrong bit flipping,which can impair the decoding performance of the RRWBF algorithm.Hence,a single/multiple-bits switch mechanism is proposed to reduce the wrong bit flipping in the process of the multiple-bits flipping decoding.Simulation results show that the RRWBF algorithm with the multiple-bits selection and the single/multiple-bits switch mechanism have a much faster decoding speed at the cost of a little decoding performance loss as compared with the RRWBF algorithm.