English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

In this paper, we consider the problem of reducing the bit error rate offlash-based solid state drives (SSDs) when cells are subject to inter-cellinterference (ICI). By observing that the outputs of adjacent victim cells canbe correlated due to common aggressors, we propose a novel channel model toaccurately represent the true flash channel. This model, equivalent to afinite-state Markov channel model, allows the use of the sum-product algorithmto calculate more accurate posterior distributions of individual cell inputsgiven the joint outputs of victim cells. These posteriors can be easily mappedto the log-likelihood ratios that are passed as inputs to the soft LDPCdecoder. When the output is available with high precision, our simulationshowed that a significant reduction in the bit-error rate can be obtained,reaching $99.99\%$ reduction compared to current methods, when the diagonalcoupling is very strong. In the realistic case of low-precision output, ourscheme provides less impressive improvements due to information loss in theprocess of quantization. To improve the performance of the new detector in thequantized case, we propose a new iterative scheme that alternates multipletimes between the detector and the decoder. Our simulations showed that theiterative scheme can significantly improve the bit error rate even in thequantized case.

Model-Based Detector for SSDs in the Presence of Inter-cell Interference