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- W4310561336 abstract "CC-GLPDC codes are a class of generalized low-density parity-check (GLDPC) codes where the constraint nodes (CNs) represent convolutional codes. This allows for efficient decoding in the trellis with the forward-backward algorithm, and the strength of the component codes easily can be controlled by the encoder memory without changing the graph structure. In this letter, we extend the class of CC-GLDPC codes by introducing different types of irregularity at the CNs and investigating their effect on the BP and MAP decoding thresholds for the binary erasure channel (BEC). For the considered class of codes, an exhaustive grid search is performed to find the BP-optimized and MAP-optimized ensembles and compare their thresholds with the regular ensemble of the same design rate. The results show that irregularity can significantly improve the BP thresholds, whereas the thresholds of the MAP-optimized ensembles are only slightly different from the regular ensembles. Simulation results for the AWGN channel are presented as well and compared to the corresponding thresholds." @default.
- W4310561336 created "2022-12-12" @default.
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- W4310561336 date "2022-11-30" @default.
- W4310561336 modified "2023-09-26" @default.
- W4310561336 title "Improving the Thresholds of Generalized LDPC Codes with Convolutional Code Constraints" @default.
- W4310561336 doi "https://doi.org/10.48550/arxiv.2211.17056" @default.
- W4310561336 hasPublicationYear "2022" @default.
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