The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 23, 2024
Filed:
Nov. 08, 2021
Fuzhou University, Fujian, CN;
Pingping Chen, Fujian, CN;
Zhen Mei, Fujian, CN;
Yi Fang, Fujian, CN;
Xu Luo, Fujian, CN;
Zhijian Lin, Fujian, CN;
Feng Chen, Fujian, CN;
Riqing Chen, Fujian, CN;
FUZHOU UNIVERSITY, Fujian, CN;
Abstract
A method for optimizing a Polar-RNNA quantizer of MLC NAND flash based on deep learning comprises the following steps: Step S: transforming an MLC flash detection task into a deep learning task, and obtaining three hard-decision read thresholds based on a neural network; Step S: expanding six soft-decision read thresholds based on the three hard-decision read thresholds; Step S: constructing an LLR mapping table, and obtaining new LLR information of MLC flash based on the LLR mapping table; Step S: symmetrizing an MLC flash channel, and performing density evolution; and Step S: optimizing the soft-decision read thresholds based on a genetic algorithm to obtain an optimal quantization interval. According to the invention, polar codes can be directly used for MLC flash channels without the arduous work of MLC flash channel modeling, so that the reliability of MLC flash is effectively improved.