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基于WBF和LLR-BP相结合的LDPC译码算法
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摘要
针对现有LDPC译码算法中的LLR-BP算法计算复杂度高、难以实现等问题,提出了基于WBF和LLR-BP相结合的LDPC译码算法。在LLR-BP算法译码迭代中引入WBF译码算法的加权翻转判据策略,使得译码误差概率大的码字翻转,减少迭代次数,加快译码算法的收敛速度。对该算法进行了不同码率、不同码长、不同最大迭代次数的仿真,仿真结果表明,该算法有效提高了译码速度、降低了LDPC码的译码复杂度。
In order to solve the problems of high computational complexity and difficulty in implementation of the LLR-BP algorithm in the existing LDPC decoding algorithm, a LDPC decoding algorithm based on WBF and LLR-BP is proposed. In this paper, the WBF decoding algorithm is introduced into the iterative decoding algorithm of LLR-BP algorithm, which makes code of the high decoding error probability flipped, reduces the number of iterations and accelerates the convergence speed of the decoding algorithm. The algorithm is simulated at different code rate and different code length, the maximum number of iterations. The simulation results show that the algorithm can effectively improve the decoding speed and reduce the decoding complexity of LDPC codes.
引文
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