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. 18, 2010
Filed:
Dec. 08, 2006
Tae-hoon Kim, Seoul, KR;
Pan-soo Kim, Daejon, KR;
Dae-ig Chang, Daejon, KR;
Deock-gil OH, Daejon, KR;
Seong-jun Lee, Seoul, KR;
Tae-Hoon Kim, Seoul, KR;
Pan-Soo Kim, Daejon, KR;
Dae-Ig Chang, Daejon, KR;
Deock-Gil Oh, Daejon, KR;
Seong-Jun Lee, Seoul, KR;
Electronics and Telecommunications Research Institute, Daejeon, KR;
Abstract
An apparatus and method for correcting a frequency offset in a satellite digital video broadcasting system includes a frequency response transformer for receiving a satellite digital video broadcasting signal and acquiring frequency responses divided into positive and negative frequency parts; a rotation/difference value calculation unit for selecting a frequency response inputted from the frequency response transformer and calculating a first value indicating a difference in area without rotation for the selected frequency response, and calculating a second value indicating a difference in area with rotation for the remaining frequency responses; a zero intersection point calculator for dividing an average slope of a straight line formed by the first and second values by the first value, and calculating a zero intersection point of an area difference value on the straight line; and a frequency offset estimator for correcting the zero intersection point to thereby estimate the frequency offset.