Apparatus and method for noise approximation maximum approximation detection

摘要

The present invention relates to the use of a novel noise prediction maximum-approximation (NPML) data detection scheme performed on signal samples received from a channel through an equalization filter, and more particularly to the use of a storage channel of a direct access storage device will be. This is accomplished by applying a noise prediction / whitening process to the output signal of the equalizer, as well as by providing branch-matrix computation means of a max-approximate sequence detector (MLSD). It also enables the cancellation of the inter-symbol interference (ISI) components of the signal samples by appropriate table look-up. The contents of the table lookup are addressed using determinations from the path history of the max-approximate sequence detector.