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An Iterative Decoding Scheme for Davey-MacKay Construction
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DOI：10.1109/CC.2018.8398515.png)
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Abstract
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In the Davey-MacKay (DM) construction, the inner decoder treats unknown transmitted bits as random independent substitution errors. It limits the synchronization capability of the inner decoder. and thus weakens the error-correcting capability of the DM construction. In order to improve the performance of the DM construction, an iterative decoding scheme is proposed, which iteratively utilizes the more accurate estimates of transmitted codewords. In the proposed scheme, the estimated average bit error rates and the estimated low-density parity-check (LDPC) codewords from the outer decoder are fed back into the inner decoder to update the synchronization process. Simulation results show that the proposed iterative decoding scheme significantly outperforms the traditional DM construction.
Keywords:
Davey-MacKay construction
iterative decoding
LDPC code
synchronization error
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