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:
Mar. 09, 2004
Filed:
Jan. 05, 2001
Joon Tae Kim, Seoul, KR;
LG Electronics Inc., Seoul, KR;
Abstract
A partial fractionally spaced equalizer for a digital television includes, a feedforward filter unit for receiving an input signal sampled at a predetermined frequency, which is divided a first region having a symbol spaced tap and a second region having fractional spaced taps narrower than the symbol spaced tap, a feedback filter unit having symbol spaced taps, a equalizer signal generator for processing feedforward tap signals outputted from the feedforward filter unit and the feedback tap signals outputted from the feedback filter unit and generating equalizer signals, a slicer for slicing the equalizer signals to generate a decision data and outputting the decision data to the feedback filter unit, and an error generator for generating a compensating error signal by subtracting the equalizer signal from the decision data. When a sampled input signal (Si) of 21.52 MHz is received, a fractionally spaced tap is set for the region of the input signal where there is a noise to perform equalizing fractionally, while a symbol spaced tap is set for the other frequency region to equalize the input signal. Thus, the noise included in the input signal can be effectively removed, and the signal processing can be performed at a high speed. In addition, the size of its circuit can be reduced.