Patent ID: 6460150
Filing Date: 2002-10-01
Classification: G11B,H03M

Abstract:
An apparatus for detection of data symbols received as a partial-response signal, comprising:a detector that receives said partial-response signal and outputs preliminary decisions and merge-bit information; a filtering unit that receives said partial-response signal and produces a filtered signal by whitening colored noise of said partial-response signal; a first matched filter that receives said filtered signal and provides a first output signal; a second matched filter that receives said filtered signal and provides a second output signal; a merge-bit processing unit which processes said merge-bit information for adjusting said first matched filter to match a (first most likely) error event, and for adjusting said second matched filter to match a (second most likely) error event; and an error event unit which determines whether said first most likely error event or said second most likely error event is the most likely error event, and using said most likely error event for correcting actual errors of said preliminary decisions.