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. 01, 2012
Filed:
Sep. 06, 2005
Yong-su Lee, Daejeon, KR;
Youn-ok Park, Daejeon, KR;
Eon-young Hong, Daejeon, KR;
Samsung Electronics Co., Ltd., Suwon-si, KR;
Electronics and Telecommunications Research Institute, Daejeon, KR;
KT Corporation, Seongnam-si, KR;
SK Telecom Co., Ltd., Seoul, KR;
KTFreetel Co., Ltd., Seoul, KR;
Hanaro Telecom, Inc., Seoul, KR;
Abstract
An apparatus and method for canceling a DC offset efficiently removes the DC offset by calculating the DC offset after acquiring synchronization in a terminal receiver used for an orthogonal frequency division multiplexing system. The apparatus for canceling the DC offset includes an adding/averaging unit (), an accumulator (), a synchronization determiner (), and a pulse density modulation signal generator (). The adding and averaging the added input data signals over one frame. The accumulator () outputs a DC offset control value by successively accumulating the DX offsets calculated from the adding and averaging unit. The synchronization determiner () determines whether to output the DC offset control value provided by the accumulator () based on synchronization information. The pulse density modulation signal generator () generates a digital pulse density modulation signal based on a representative value provided by the synchronization determiner ().