Patent ID: 8767333
Filing Date: 2014-07-01
Classification: G11B,H03M

Abstract:
1. A data processing system, the data processing circuit comprising: a noise predictive filter circuit including at least a first pattern dependent filter circuit operable to perform noise predictive filtering on a data input for a first pattern using a first adaptive target to yield a first noise predictive output, and a second pattern dependent filter circuit operable to perform noise predictive filtering on the data input for a second pattern using a second adaptive target to yield a second noise predictive output; data detector circuit operable to apply a data detection algorithm to the first noise predictive output and the second noise predictive output to yield a detected output; a first pattern dependent adaptive target circuit operable to adaptively calculate the first adaptive target based at least in part on the first noise predictive output and a training sequence including multiplying an ideal output by a programmable adaptation gain; and a second pattern dependent adaptive target circuit operable to adaptively calculate the second adaptive target based at least in part on the second noise predictive output and the training sequence.