Statistical read comparison signal generation for memory systems

摘要

Implementations include systems, methods and/or devices suitable for use in a memory system that may enhance the performance of error control codes used to improve the reliability with which data can be stored and read. Some implementations include systems, methods and/or devices enabled to generate and utilize soft information for decoding encoded data read from a storage medium. More specifically, some implementations utilize a collection of characterization vectors that include soft information values for bit-tuples that may be read from the storage medium for various combinations of the storage medium characterization parameter values. Some implementations are enabled to determine and utilize read comparison signal values associated with one or more storage medium characterization parameter values. And some implementations are enabled to determine and utilize shifted read comparison signal values associated with one or more storage medium characterization parameter values and an identified error condition.

主权项

1. A device operable to provide one or more read comparison signal values for reading data from a storage medium, the device comprising:
a characterization module including a plurality of characterization vectors; wherein each characterization vector corresponds to a set of one or more storage medium characterization parameter values and includes a first set of one or more read comparison signal values; a selection module to select a characterization vector based on a specified set of one or more storage medium characterization parameter values for the storage medium, the specified set comprising one or more of: a mode of operation associated with at least a portion of the storage medium, a history of use associated with at least a portion of the storage medium, a read type associated with at least a portion of the storage medium, and a location associated with at least a portion of the storage medium; and a read controller to provide the respective first set of one or more read comparison signal values, from the selected characterization vector, to read circuitry associated with the storage medium.