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:
Apr. 15, 2008
Filed:
Oct. 21, 2004
Young-ha Lee, Daejeon, KR;
Jun-woo Kim, Daejeon, KR;
Youn-ok Park, Daejeon, KR;
Seung-ku Hwang, Seoul, KR;
Young-Ha Lee, Daejeon, KR;
Jun-Woo Kim, Daejeon, KR;
Youn-Ok Park, Daejeon, KR;
Seung-Ku Hwang, Seoul, KR;
Electronics and Telecommunications Research Institute, , KR;
Samsung Electronics Co., Ltd., , KR;
SK Telecom Co., Ltd., , KR;
KT Corporation, , KR;
KTFreetel Co., Ltd., , KR;
Hanaro Telecom, Inc., , KR;
Abstract
Disclosed is a ranging system and method in an OFDMA system. The ranging system includes complex exponential twiddle storage units for respectively storing complex exponential twiddle factors corresponding to a timing error, complex multipliers for respectively complex-multiplying the complex exponential twiddle factors by received uplink ranging data, code correlators for respectively correlating the outputs of the complex multipliers and ranging codes, and threshold comparators for respectively comparing the outputs of the code correlators with a threshold.