Reliability ratio based weighted bit-flipping decoding for LDPC codes

Author

Guo, Feng ; Hanzo, Lajos

Author_Institution

Sch. of ECS, Southampton Univ., UK

Volume

1

fYear

2005

fDate

30 May-1 June 2005

Firstpage

709

Abstract

In this contribution, a novel reliability-ratio based weighted bit-flipping (RRWBF) algorithm is proposed for decoding low density parity check (LDPC) codes. The RRWBF algorithm proposed is benchmarked against the conventional weighted bit-flipping (WBF) algorithm and the improved weighted bit-flipping (IWBF) algorithm. More than 1 and 2 dB coding gain was achieved at a BER of 10^-5 while invoking the RRWBF algorithm in comparison to the two benchmarking schemes, when communicating over an AWGN and an uncorrelated Rayleigh channel, respectively. Furthermore, the decoding complexity of the proposed RRWBF algorithm is maintained at the same level as that of the conventional WBF algorithm.

Keywords

AWGN channels; Rayleigh channels; decoding; error statistics; parity check codes; AWGN channel; BER; LDPC codes; RRWBF; decoding complexity; low density parity check codes; reliability-ratio based weighted bit-flipping; uncorrelated Rayleigh channel; AWGN; Bit error rate; Gain; Gaussian noise; Information theory; Iterative decoding; Parity check codes; Phase change materials; Rayleigh channels; Sum product algorithm;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2005. VTC 2005-Spring. 2005 IEEE 61st

ISSN

1550-2252

Print_ISBN

0-7803-8887-9

Type

conf

DOI

10.1109/VETECS.2005.1543385

Filename

1543385