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:
Dec. 18, 2007
Filed:
Apr. 27, 2004
Chorng-ren Sheu, Kohsiung, TW;
Meng-chun Chang, Chung-Ho, TW;
Chia-chi Huang, Hsinchu, TW;
Yu-jung Chang, Kaohsiung, TW;
Chorng-Ren Sheu, Kohsiung, TW;
Meng-Chun Chang, Chung-Ho, TW;
Chia-Chi Huang, Hsinchu, TW;
Yu-jung Chang, Kaohsiung, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
A method and apparatus for the signal synchronization of an orthogonal frequency division multiplexing system includes a delay conjugate multiplication module, a phase processor and an edge detector. It provides estimates for the boundaries of inter-symbol interference free region by utilizing the characteristics of a guard interval in combination with the techniques of the delay conjugate multiplication module, phase differential operation, symbol-by-symbol average operation, and edge detection. The method determines a fixed optimal threshold for directly separating the inter-symbol interference region in a mobile environment to obtain an inter-symbol interference free version of symbol information.