TRACKING AND USE OF TRACKED BIT VALUES FOR ENCODING AND DECODING DATA IN UNRELIABLE MEMORY

摘要

A non-volatile memory system may include a tracking module that tracks logic values of bits to be stored in memory elements identified as unreliable. A record of the logic values may be generated. During decoding of the data, a log likelihood ratio module may use the record to assign log likelihood ratio values for the decoding.

主权项

1. A non-volatile memory system comprising:
non-volatile memory; and a controller comprising a plurality of write modules to write data into the non-volatile memory and a plurality of read modules to read the data from the non-volatile memory, wherein the plurality of write modules comprises:
an unreliable storage location identifier module configured to:
identify a plurality of memory elements of the non-volatile memory to store the data; anddetermine which memory elements of the plurality of memory elements are identified in the non-volatile memory system as unreliable; anda tracking module configured to track logic values of bits of the data to be stored in the identified unreliable memory elements; and wherein the plurality of read modules comprises:
a log likelihood ratio module configured to assign log likelihood ratio values to the bits of data stored in the identified unreliable memory elements based on the tracked logic values.