@inproceedings{89e703a121bd48e6b3339f2c351a509b,
title = "A 3.46 Gb/s (9141,8224) LDPC-based ECC scheme and on-line channel estimation for solid-state drive applications",
abstract = "As the reliability of NAND Flash memory keeps degrading, Low-Density Parity-Check (LDPC) codes are widely proposed to extend the endurance of Solid State Drive (SSD). However, implementing powerful decoding algorithm such as soft min-sum algorithm with high decoding speed comes along with higher hardware cost. To achieve efficient hardware cost, we propose a multi-strategy ECC scheme which consists of modified gradient descent bit-flipping (MGDBF), hard min-sum, and soft min-sum decoders. The MGDBF decoder aims to correct most of the erroneous codewords with advantages of high decoding throughput and low hardware cost, while the soft min-sum decoder is targeted to correct codewords with large number of errors under moderate decoding throughput and reasonable hardware cost. In addition, we propose a bi-sectional channel estimation technique which enables on-line estimation of distribution to generate accurate soft information for LDPC decoding with low complexity. The ECC codec and the complete Toggle DDR 1.0 NAND interface control circuits are integrated and fabricated in 90nm CMOS process. The throughput of proposed MGDBF decoder achieves 3.46 Gb/s which satisfies the throughput requirement of both toggle DDR 1.0 and 2.0 NAND interfaces.",
keywords = "LDPC codes, NAND Flash memory, Solid State Drive",
author = "Ho, {Kin Chu} and Chen, {Chih Lung} and Liao, {Yen Chin} and Hsie-Chia Chang and Chen-Yi Lee",
year = "2015",
month = may,
day = "24",
doi = "10.1109/ISCAS.2015.7168917",
language = "English",
series = "Proceedings - IEEE International Symposium on Circuits and Systems",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "1450--1453",
booktitle = "2015 IEEE International Symposium on Circuits and Systems, ISCAS 2015",
address = "United States",
note = "IEEE International Symposium on Circuits and Systems, ISCAS 2015 ; Conference date: 24-05-2015 Through 27-05-2015",
}