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:
Jul. 29, 2003
Filed:
Feb. 11, 2002
Shihe Li, Beijing, CN;
China Academy of Telecommunications Technology, Beijing, CN;
Abstract
This invention discloses a method and a device for calibrating smart antenna arrays in real time. The invention includes the steps of providing a calibrating link comprising a coupling structure, feeder cables and pilot transceiver; pre-calibrating the coupling structure with a vector network analyzer and recording its receiving and transmitting transmission coefficients, respectively; implementing the receiving calibration to a smart antenna array by adjusting the transmission coefficient of each receiving link and a reference link to the same amplitude and phase difference &PHgr;, which is recorded and stored in a baseband processor; and implementing the transmitting calibration by adjusting the transmission coefficient of each transmitting link and a reference link to the same amplitude and phase difference &PSgr;, which is recorded and stored in the baseband processor. The coupling structure of the invention is implemented by a pilot antenna using spatial couple mode or a passive network.