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:
Sep. 22, 2009
Filed:
Sep. 08, 2006
Kurt Weese, Ditzingen, DE;
Kurt Weese, Ditzingen, DE;
Alcatel, Paris, FR;
Abstract
The invention relates to a method of calibrating the reception path and the transmit path of an antenna array which is formed of at least three antennas and which is connected to a digital signal processor. For calibrating the reception path a signal of known amplitude and known phase is transmitted by a single antenna and received by n−1 antennas. For calibrating the transmit path of an antenna array path a signal of known amplitude and known phase is transmitted by n−1 antennas and received by the nantenna. A phase difference and an amplitude difference between each of the n−1 transmitted signals is evaluated and the steps are repeated with a new transmit antenna until every antenna has been used as a transmit antenna. In the last step the phase differences and their associated amplitude differences are set to the factory-said values.