Read channel optimization using multi-dimensional smoothing

• Main Authors: FAN HONGJIAN, ZHU WENZHONG, LE OAI, COX RICHARD
• Format: Patent
• Language: English
• Published: 12.04.2016
• Subjects: CONTROL OR REGULATING SYSTEMS IN GENERAL; CONTROLLING; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS; PHYSICS; REGULATING

Apparatus and method for optimizing read channel parameters in a storage device. In some embodiments, a method includes obtaining raw error rate data for different read channel parameter values in each of a plurality of zones of a memory. The raw error rate data for each of the different reach channel parameter values are filtered to provide a sequence of second order polynomial curves with smoothed data points in each of the zones. A second order regression is applied to the smoothed data points in each of the zones to provide a sequence of regression curves. An optimal read channel parameter value for each of the zones is selected using the sequence of regression curves, and the optimal read channel parameter values are used during subsequent read operations to retrieve data stored in the zones.