Fig 1.
The flow chart of BP decoding for LDPC codes over GF(q) on AWAN channel.
Fig 2.
Poisson probability vs. the term number m with different mean A.
Fig 3.
PDF of noise amplitude z for A = 1 and L = 0, 1, 2, ….
Fig 4.
LLR for AWGN and AWAN channels.
Table 1.
Results of convergence comparisons at different BER by utilizing Wilcoxon rank test (α = 0.05).
Fig 5.
BER performance of the optimized FFT BP algorithm on AWAN channel.
Fig 6.
Performance comparison of LDPC codes over GF(2) and GF(64) on AWAN channel.
Fig 7.
Performance comparison of QC LDPC codes on AWAN channel with A = 0.1 and Γ = 0.1.
Table 2.
Effect of AWAN channel parameters on performance of the optimized FFT BP.
Fig 8.
Performance comparison of the proposed method with piecewise fitting.