Improved Log-BP Algorithm Based on GDL for M-ary APSK Modulated LDPC Code

Author

Wang, Ying ; Xie, Ley ; Chen, Huifang ; Wang, Kuang

Author_Institution

Dept. of Inf. Sci. & Electron. Eng., Zhejiang Univ., Hangzhou

fYear

2008

Firstpage

30

Lastpage

34

Abstract

Based on Generalized Distributive Law (GDL), improved belief propagation (BP) algorithm in logarithm domain for M-ary APSK modulated Low-density parity-check (LDPC) code which can get a better tradeoff between error performance and decoding complexity is proposed. Also the Min-Sum approximation of the improved log-BP algorithm is deduced. Simulation shows that the improved log-BP and Min-Sum algorithms achieve a better bit error rate(BER) compared with the corresponding binary algorithms when decoding a short frame 16APSK modulated LDPC code based on DVB-S2 standard.

Keywords

amplitude shift keying; decoding; digital video broadcasting; error statistics; parity check codes; phase shift keying; DVB-S2 standard; GDL; M-ary APSK modulated LDPC code; belief propagation algorithm; binary algorithms; bit error rate; decoding complexity; generalized distributive law; log-BP algorithm; low-density parity-check code; min-sum approximation; Approximation algorithms; Belief propagation; Code standards; Degradation; Digital video broadcasting; Information science; Iterative algorithms; Iterative decoding; Modulation coding; Parity check codes;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems for Communications, 2008. ICCSC 2008. 4th IEEE International Conference on

Conference_Location

Shanghai

Print_ISBN

978-1-4244-1707-0

Electronic_ISBN

978-1-4244-1708-7

Type

conf

DOI

10.1109/ICCSC.2008.14

Filename

4536706