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:
May. 11, 2004
Filed:
Apr. 23, 2001
Monisha Ghosh, Chappaqua, NY (US);
Patrick D. Kelliher, Belmont, MA (US);
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
For use in a receiver capable of decoding trellis encoded signals, there is disclosed an apparatus and method for reducing error propagation in a decision feedback equalizer. The apparatus of the invention comprises a trellis decoder and a decision feedback equalizer coupled to the path memory outputs of the trellis decoder. The decision feedback equalizer is capable of obtaining symbol values from the trellis decoder and using the symbol values as estimates in channel equalization. In one embodiment of the invention, a first equalizer and trellis decoder combination is used to estimate a symbol stream. Then a second equalizer and trellis decoder combination is used to further minimize error by operating on the output of the first equalizer and trellis decoder combination.