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. 10, 2011
Filed:
Dec. 07, 2006
Yong-su Lee, Daejeon, KR;
Youn-ok Park, Daejeon, KR;
Young-jo Bang, Daejeon, KR;
Kyung-yeol Sohn, Daejeon, KR;
Jae-gun Jung, Daejeon, KR;
Yong-Su Lee, Daejeon, KR;
Youn-Ok Park, Daejeon, KR;
Young-Jo Bang, Daejeon, KR;
Kyung-Yeol Sohn, Daejeon, KR;
Jae-Gun Jung, Daejeon, KR;
Samsung Electronics Co., Ltd, , KR;
Electronics and Telecommunications Research Institute, , KR;
KT Corporation, , KR;
SK Telecom Co., Ltd, , KR;
Hanaro Telecom., Inc., , KR;
Abstract
In a calibration apparatus in a communication system, a modulation unit calculates a reference signal by modulating a downlink signal, and a digital Intermediate Frequency (IF) unit converts the reference signal to an intermediate frequency signal. An up-converter converts the intermediate frequency signal to a Radio Frequency (RF) signal, and a down-converter generates a received signal for each of the paths from the RF signal to be transmitted through each path. A calibrator calculates a correction value for each path and a delay value by using the reference signal and the received signal for each path.