Read Voltage Optimization in MLC NAND Flash Memory via the Density Evolution

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dc.contributor.authorDuangthong, Chatuporn
dc.contributor.authorPhakphisut, Watid
dc.contributor.authorSupnithi, Pornchai
dc.date.accessioned2026-08-06T10:24:20Z
dc.date.available2026-08-06T10:24:20Z
dc.date.issued2019-04-01
dc.description.abstractThe multi-level-cell (MLC) NAND flash memory can typically use multiple reads for obtaining soft information for the LDPC decoder. The multiple reads give the soft information which is quantized to a certain level. The major challenge is that the read voltages must be precisely selected to provide better soft information. In the previous work, the read voltages are selected so that the soft information has the maximum mutual information (MMI). However, the error-correction capability of LDPC decoder is not considered. Therefore, in this work, we analyze the performance of LDPC decoder by density evolution whereby the soft information is quantized. Then the optimal read voltages for given LDPC codes are obtained. As a result, for a regular LDPC code with the read voltages optimized by density evolution can provide the lower BER performance compared with the MMI technique.
dc.identifier.citation2019 26th International Conference on Telecommunications ICT 2019, 361-365, 2019
dc.identifier.doi10.1109/ICT.2019.8798808
dc.identifier.other2-s2.0-85071493726
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/9793
dc.source2019 26th International Conference on Telecommunications ICT 2019
dc.subjectdensity evolution
dc.subjectLDPC code
dc.subjectMLC NAND flash memory
dc.subjectread voltage optimization
dc.titleRead Voltage Optimization in MLC NAND Flash Memory via the Density Evolution
dc.typeConference Paper

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