Design of Protograph-LDPC-Based BICM-ID for Multi-Level-Cell (MLC) NAND Flash Memory
Design of Protograph-LDPC-Based BICM-ID for Multi-Level-Cell (MLC) NAND Flash Memory
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基于 Protograph-LDPC 的 BICM-ID 多级单元 (MLC) NAND 闪存设计
DOI:
10.1109/lcomm.2019.2915223
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发表时间:
2019-05
期刊:
影响因子:
--
通讯作者:
Guizani Mohsen
中科院分区:
文献类型:
--
作者:
Bu Yingcheng;Fang Yi;Han Guojun;Mumtaz Shahid;Guizani Mohsen
In this letter, the optimization of protograph-low-density parity-check (LDPC)-based bit-interleaved coded modulation with iterative detection and decoding (BICM-ID) with anti-Gray mapping is investigated over multi-level-cell (MLC) NAND flash-memory channels. Since the existing protograph-based extrinsic information transfer (PEXIT) algorithm is not applicable to the BICM-ID MLC flash-memory channels, a voltage-sensing PEXIT (VS-PEXIT) algorithm is proposed to facilitate the threshold analysis of protograph codes. Exploiting the proposed VS-PEXIT algorithm, we find that the optimal AR4JA code over AWGN channels cannot preserve its superiority over BICM-ID MLC flash-memory channels. To tackle this problem, we further propose a design scheme to construct a high-rate protograph code, referred to as optimized accumulate-repeat-accumulate (OARA) code, tailored for such scenarios. Theoretical analyses and simulation results illustrate that the proposed OARA-based BICM-ID appears to be an excellent storage scheme over MLC flash-memory channels.
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影响因子:
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作者:
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通讯作者:
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