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:
Oct. 30, 2012
Filed:
Oct. 07, 2009
Low density parity code (ldpc) decoding for memory with multiple log likelihood ratio (llr) decoders
Eran Sharon, Rishon Lezion, IL;
Idan Alrod, Herzliya, IL;
Ariel Navon, Hod Hashron, IL;
Opher Lieber, Kfar Saba, IL;
Eran Sharon, Rishon Lezion, IL;
Idan Alrod, Herzliya, IL;
Ariel Navon, Hod Hashron, IL;
Opher Lieber, Kfar Saba, IL;
SanDisk IL Ltd., Kfar Saba, IL;
Abstract
Data stored in memory is decoded using iterative probabilistic decoding and multiple decoders. A first decoder attempts to decode a representation of a codeword. If the attempt is unsuccessful, a second decoder attempts to decode the representation of a codeword. The second decoder may have a lower resolution than the first decoder. Probability values such as logarithmic likelihood ratio (LLR) values may be clipped in the second decoder. This approach can overcome trapping sets while exhibiting low complexity and high performance. Further, it can be implemented on existing decoders such as those used in current memory devices.