The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 11, 2002
Filed:
Oct. 07, 1998
Constantin Michael Melas, Los Gatos, CA (US);
International Business Machines Corp., Armonk, NY (US);
Abstract
The present invention is a data detection channel with improved detection reliability and better immunity to signal dropout and noise, that has reduced data redundancy. The data detection channel includes a preamp/filter, a sample/quantizer, an equalizer, a timing recovery circuit and a digital detection filter. The digital detection filter includes a finite impulse response filter, a synchronization and windowing device and a data detection circuit. The a finite impulse response filter has a plurality of coefficients and stores a plurality of channel data samples. On each cycle of the sampling clock, the finite impulse response filter is operable to input and store a channel data sample and output a sum signal representing a sum of each product of each coefficient multiplied by a corresponding stored channel data sample. The synchronization and windowing device is operable to receive the sum signal each sampling clock cycle and output the sum signal, if it corresponds to a symbol. The data detection circuit is operable to receive a sum signal that corresponds to a symbol and outputting digital data represented by the symbol.