Patent ID: 11862194
Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A data storage system, comprising:
a head configured to produce a signal representing data stored on a storage medium;
an estimator configured to determine an estimated signal from the signal, the estimated signal comprising a superposition of an estimated linear portion of a partial-response equalizer output and an estimated nonlinear portion of the signal;
a bank of noise whitening filters configured to apply one or more noise whitening filters to a difference between the signal and the estimated signal to produce a filtered signal;
a branch metric calculator configured to perform one or more branch metric calculations on a metric input signal based on the filtered signal to generate one or more branch metrics; and
an adaptive data-dependent noise-predictive maximum likelihood sequence detector configured to generate an output stream representing the data based on the one or more branch metrics.