Title :
Performance analysis of finite-length LDPC codes
Author :
Xue, Yingjian ; Xiang, Haige
Author_Institution :
Dept. of Electron., Peking Univ., Beijing, China
Abstract :
In this paper, we are concerned with the finite-length analysis of low-density parity-check (LDPC) codes when used over additive white Gaussian noise (AWGN) channels. We present the iterative decoding algorithm of LDPC codes, and we also discuss the encoding methods and the bipartite graph representation of LDPC codes ensemble. Finite-length LDPC code performances are investigated, and the influence of cycle is pointed out. Simulation results show that irregular LDPC codes with variable and check node degree distribution optimized for infinite-length codes are not optimal for finite-length LDPC codes, and the error patterns of both regular and irregular codes are investigated as an effort to improve the performance and design methodology of finite-length LDPC codes.
Keywords :
AWGN channels; error detection codes; graph theory; iterative decoding; parity check codes; AWGN channels; additive white Gaussian noise channels; bipartite graph representation; cycle influence; error patterns; finite-length LDPC codes; irregular LDPC codes; iterative decoding algorithm; low-density parity-check codes; performance analysis; AWGN; Additive white noise; Belief propagation; Design methodology; Iterative algorithms; Iterative decoding; Maximum likelihood decoding; Parity check codes; Performance analysis; Turbo codes;
Conference_Titel :
Signal Processing Advances in Wireless Communications, 2003. SPAWC 2003. 4th IEEE Workshop on
Print_ISBN :
0-7803-7858-X
DOI :
10.1109/SPAWC.2003.1318927
