Acta Photonica Sinica, Volume. 41, Issue 3, 277(2012)
Optimization of Two BP-based Decoding Algorithms for LDPC Codes Based on MMSE Criterion under Weak Turbulence Channel
Due to high complexity of Belief Propagation(BP) algorithm, several kind of BP-based simplified decoding algorithms are analyzed. Based on the Minimum Mean Square Erro(MMSE) criterion, optimal design of the scaled BP-based and offset BP-based algorithms is discussed. The theoretical formulas and numerical calculations on the optimal factors for these two BP-based algorithms are provdied. The simualtion resutls for the (6,3)regualr LDPC codes of lengths 1008 on the weak atmospheric turbulence channel demonstrate that the scaeld BP-based and offset BP-based aglorithms with the proposed factors are better than Min-Sum Algorithm, and even can achieve the performance better than that of the BP algorithm,and have lower complexity compared with BP algortihm.
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LENG Jiao-feng, HAO Shi-qi, L Xu-guang, ZHOU Jian-guo, ZHAO Nan-xiang. Optimization of Two BP-based Decoding Algorithms for LDPC Codes Based on MMSE Criterion under Weak Turbulence Channel[J]. Acta Photonica Sinica, 2012, 41(3): 277
Received: Jul. 20, 2011
Accepted: --
Published Online: Mar. 30, 2012
The Author Email: Jiao-feng LENG (lengjiaofeng@Yahoo.cn)