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Soft-decision input generation for data storage systems

專利號(hào)
US11175983B2
公開(kāi)日期
2021-11-16
申請(qǐng)人
Western Digital Technologies, Inc.（US CA San Jose）
發(fā)明人
Guangming Lu; Kent D. Anderson; Anantha Raman Krishnan; Shafa Dahandeh
IPC分類
G06F11/10
技術(shù)領(lǐng)域
bit,llr,memory,decision,read,may,in,reads,page,soft
地域： CA CA San Jose

摘要

An error management system for a data storage device can generate soft-decision log-likelihood ratios (LLRs) using multiple reads of memory locations. Bit patterns provided by multiple reads of reference memory locations can be counted and used to generate probability data that is used to generate possible LLR values for decoding target pages. Possible LLR values are stored in one or more look-up tables.

說(shuō)明書(shū)

E0 0 0 1 0 0 . . . E1 0 0 1 1 1 E2 1 0 1 1 0 LLR V1 V0 V3 V2 V2 value

Similarly in FIG. 5B, at block 520 a sequence of LLRs based at least in part on the possible LLRs (from block 518) and on bit patterns from a multiple read operation on the target memory location is generated and data from a target memory location is decoded using the generated sequence of LLRs.

Other Variations

權(quán)利要求

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