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- W3154655145 abstract "Multitype quasi-cyclic (QC) low-density parity-check (LDPC) codes are a class of protograph LDPC codes lifted cyclically from protographs with multiple edges, represented by two weight and slope matrices. For a given weight-matrix, an approach is proposed to find the maximum-achievable girth $g_{max }$ of the corresponding multitype QC-LDPC codes by some inevitable chains having less complexity than the existing methods. This advantage leads to some new patterns of the weight matrices such that the corresponding codes have some improvements in terms of the maximum-achievable girths or the minimum-distance upper-bounds. In continue, for a given weight-matrix with maximum-achievable girth $g_{max }$ , some slope-matrices are constructed by a depth-first search algorithm for which the corresponding multitype QC-LDPC codes with even girth $g$ , $gle g_{max }$ , have smaller lengths, higher rates, or larger minimum-distances than the state-of-the-art achievements. Simulation results show that the constructed codes have some error-rate advantages than PEG, random-like, CCSDS, and 802.11n/ac IEEE standard LDPC codes." @default.
- W3154655145 created "2021-04-26" @default.
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- W3154655145 date "2021-01-01" @default.
- W3154655145 modified "2023-10-17" @default.
- W3154655145 title "On the Construction of Multitype Quasi-Cyclic Low-Density Parity-Check Codes With Different Girth and Length" @default.
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- W3154655145 doi "https://doi.org/10.1109/access.2021.3071846" @default.
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