Abstract
Since short cycles and trapping sets are culprits of performance and error floor of low-density parity-check (LDPC) codes, it is necessary to obtain information about the number and the distribution of all cycles in Tanner graphs. However, the established algorithms could not efficiently search all cycles on account of restrictions from both the structure and the girth of Tanner graphs. The proposed algorithm solve the above problems with message-passing schedule, counting and enumerating the cycles simultaneously. With information derived from the proposed algorithm, performance will be enhanced and error floor will be lower, which is meaningful for both adjustment and design of LDPC codes. Furthermore, the proposed algorithm can be applied on general bipartite graphs.
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Yang, K., Zhang, B., Zhan, Y., Guo, D. (2017). Design and Analysis of Efficient Algorithm for Counting and Enumerating Cycles in LDPC Codes. In: Balas, V., Jain, L., Zhao, X. (eds) Information Technology and Intelligent Transportation Systems. Advances in Intelligent Systems and Computing, vol 454. Springer, Cham. https://doi.org/10.1007/978-3-319-38789-5_23
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DOI: https://doi.org/10.1007/978-3-319-38789-5_23
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