Paper Info
Title
Quantization And Reliability-Aware Iterative Majority-Logic Decoding Algorithm For Ldpc Code In Tlc Nand Flash Memory
Abstract
Multi-level per cell (MLC) /Triple-Level per cell (TLC) technique significantly improves storage density with low cost increases, which stores more than one bit per cell, but also drastically decreases reliability in NAND flash memory. As the bit number per cell increases, correspondingly cell-to-cell interference (CCI) becomes the major challenge for NAND flash memory technology scaling. Recently, low-density parity-check (LDPC) code is considered as the most appropriate scheme of next generation Error Correcting Code (ECC) in NAND flash memory. In this paper, by exploiting the intra-cell characteristics in TLC NAND flash memory channels, a low-complexity quantization and reliability-Aware iterative majority-logic decoding (QR-IMLGD) algorithm for LDPC code is proposed to reduce the memory read latency and effectively improve the throughput of LDPC decoding. The proposed algorithm takes advantage of highly unequal error probability of input log-likelihood-ratios (LLRs) in the same cells, employ small bit-level quantizer and update only less reliable variable nodes that are initiated with higher error probability LLR values. Simulation results show that the proposed QR-IMLGD algorithm can yield a noticeable improvement in decoding convergence rate without compromising the error performance in TLC NAND flash memory channels.
Year
Venue
Keywords
2016
2016 8TH INTERNATIONAL CONFERENCE ON WIRELESS COMMUNICATIONS & SIGNAL PROCESSING (WCSP)
Terms multi-level per cell (MLC), triple-Level per cell (TLC), cell-to-cell interference (CCI), low-density parity-check (LDPC) code, majority-logic decoding (MLGD)
Field
DocType
ISSN
Computer science,Low-density parity-check code,Parallel computing,Communication channel,Algorithm,Error detection and correction,Real-time computing,Bit numbering,Throughput,Decoding methods,Quantization (signal processing),Majority logic decoding
Conference
2325-3746
Citations 
PageRank 
References 
0
0.34
0
Authors
6
Name
Order
Citations
PageRank
Lingjun Kong100.34
Jiaying Wen200.34
Guojun Han3453.18
Sheng-Mei Zhao45012.39
Ming Jiang519831.08
Chunming Zhao667164.30