Title :
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
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;
Conference_Titel :
Wireless Communications and Networking Conference, 2007.WCNC 2007. IEEE
Conference_Location :
Kowloon
Print_ISBN :
1-4244-0658-7
Electronic_ISBN :
1525-3511
DOI :
10.1109/WCNC.2007.128
