PROJECT TITLE :

Exploiting Intracell Bit-Error Characteristics to Improve Min-Sum LDPC Decoding for MLC NAND Flash-Based Storage in Mobile Device - 2016

ABSTRACT:

A multilevel per cell (MLC) technique significantly improves the storage density, however additionally poses serious knowledge integrity challenge for NAND flash memory. This consequently makes the low-density parity-check (LDPC) code and therefore the soft-decision memory sensing become indispensable in the subsequent-generation flash-based solid-state storage devices. But, the utilization of LDPC codes inevitably increases memory read latency and, hence, degrades speed performance. Motivated by the observation of intracell unbalanced bit error likelihood and knowledge dependence in the MLC NAND flash memory, this paper proposes 2 techniques, i.e., intracell knowledge placement interleaving and intracell information dependence aware LDPC decoding, to efficiently improve the LDPC decoding throughput and energy efficiency for the MLC NAND flash-based mostly storage in an exceedingly mobile device. Experimental results show that, by exploiting the intracell bit-error characteristics, the proposed techniques along can improve the LDPC decoding throughput by up to eighty four.half dozenp.c and scale back the energy consumption by up to 33.a pair ofpercent whereas solely incurring less than zero.a pair ofpercent silicon space overhead.