New Ensemble of Time-invariant LDPC Convolutional Codes with High Performance
MU Liwei①② LIU Xingcheng③ ZHANG Han①②
①(School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006, China) ②(Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, South China Normal University, Guangzhou 510006, China) ③(Department of Electronic and Communications Engineering, Sun Yat-sen University, Guangzhou 510006, China)
In this paper, a new ensemble of the polynomial matrix of a time-invariant LDPC convolutional code is proposed. Based on the method of deriving time-invariant LDPC convolutional codes from QC (Quasi-Cyclic)- LDPC block codes, the elements over finite fields are used to generate directly the polynomial parity-check matrices of LDPC convolutional codes. A concrete example of using MDS (Maximum-Distance Separable) convolutional codes to derive the polynomial matrices is given. The proposed method ensures the fast encoding property, maximum encoding memory and designed rate. Simulation results show that the proposed LDPC convolutional codes exhibit low error floor and good decoding performance under BP (Belief Propagation) decoding algorithm over AWGN (Additive White Gaussian Noise) channel.
穆丽伟,刘星成, 张涵. 高性能时不变LDPC卷积码构造算法研究[J]. 电子与信息学报, 2016, 38(9): 2274-2279.
MU Liwei, LIU Xingcheng, ZHANG Han. New Ensemble of Time-invariant LDPC Convolutional Codes with High Performance. JEIT, 2016, 38(9): 2274-2279.
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