A Perturbation Method for Decoding LDPC Concatenated with CRC

Author

Xiao Dongliang ; Lu Jianhua ; Lin Chunlei ; Jiao Bingli

Author_Institution

Dept. of Electron. Eng., Tsinghua Univ., Beijing

fYear

2007

fDate

11-15 March 2007

Firstpage

667

Lastpage

671

Abstract

In this paper, a novel decoding algorithm using perturbation techniques for LDPC concatenated with CRC (LDPC-CRC) is proposed. The CRC is used to check the residual error of the BP algorithm, while a new parameter is introduced to LDPC decoding to describe the reliability of each bit in the iterative decoding algorithm. Upon an error is detected, re-decoding process with perturbation method will be aroused. Simulation results show that this method lowers the error floor for codeword length of several hundred bits effectively.

Keywords

concatenated codes; cyclic redundancy check codes; iterative decoding; parity check codes; perturbation theory; BP algorithm; LDPC decoding; codeword length; cyclic redundancy check; iterative decoding algorithm; low density parity check code; perturbation method; perturbation techniques; residual error; AWGN; Communications Society; Concatenated codes; Cyclic redundancy check; Iterative algorithms; Iterative decoding; Joining processes; Message passing; Parity check codes; Perturbation methods;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference, 2007.WCNC 2007. IEEE

Conference_Location

Kowloon

ISSN

1525-3511

Print_ISBN

1-4244-0658-7

Electronic_ISBN

1525-3511

Type

conf

DOI

10.1109/WCNC.2007.128

Filename

4224373