Title :
MMSE-based design of scaled and offset BP-based decoding algorithms on the fast Rayleigh fading channel
Author :
Zheng, He ; Hu, Hanying
Author_Institution :
Dept. of Commun. Eng., Inf. Sci. & Technol. Inst., Zhengzhou
Abstract :
In this paper, we use the minimum mean square error (MMSE) criterion to design the scaled and offset belief propagation (BP)-based decoding algorithms for short low-density parity-check (LDPC) codes on the fast Rayleigh fading channel. Based on the MMSE criterion, the theoretical formulas and numerical calculations on the optimum factors for these two improved BP-based algorithms are provided. The simulation results for several short (Chen et al., 2005 and Gallager, 1962) regular LDPC codes on the fast Rayleigh fading channel demonstrate that the scaled and offset BP-based algorithms with our proposed factors can achieve the performance better than that of the BP algorithm
Keywords :
Rayleigh channels; decoding; least mean squares methods; parity check codes; BP-based decoding algorithms; LDPC codes; MMSE-based design; belief propagation based decoding algorithms; fast Rayleigh fading channel; minimum mean square error criterion; optimum factors; short low-density parity-check codes; AWGN; Algorithm design and analysis; Design engineering; Fading; Helium; Iterative algorithms; Iterative decoding; Parity check codes; Rayleigh channels; Sparse matrices;
Conference_Titel :
Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on
Conference_Location :
Island of Kos
Print_ISBN :
0-7803-9389-9
DOI :
10.1109/ISCAS.2006.1693021
