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Re: Gamco post# 288248

Tuesday, 04/27/2010 9:01:29 AM

Tuesday, April 27, 2010 9:01:29 AM

Post# of 432473
United States Patent 7,705,779
Goldberg , et al. April 27, 2010

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Wireless communication apparatus for determining direction of arrival information to form a three-dimensional beam used by a transceiver


Abstract
A wireless communication method and antenna system for determining the direction of arrival (DOA) of received signals in azimuth and elevation, (i.e., in three dimensions), to form a beam for transmitting and receiving signals. The system includes two antenna arrays, each having a plurality of antenna elements, two first stage multi-mode-port matrices, at least one second stage multi-mode-port matrix, an azimuth phase detector, an elevation amplitude detector, a plurality of phase shifters and a transceiver. The antenna arrays and the first stage multi-mode-port matrices form a plurality of orthogonal omni-directional modes. Each of the modes has a characteristic phase set. Two of the modes' phases are used to determine DOA in azimuth. The second stage multi-mode-port matrix forms a sum-mode and a difference-mode used to determine the DOA of the received signals in elevation. A beam is formed in the direction of the received signals by adjusting the phase shifters.


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Inventors: Goldberg; Steven J. (Downington, PA), Lynch; Michael J. (Merritt Island, FL), Chiang; Bing A. (Melbourne, FL)
Assignee: InterDigital Technology Corporation (Wilmington, DE)

Appl. No.: 12/192,477
Filed: August 15, 2008

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Related U.S. Patent Documents

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Application Number Filing Date Patent Number Issue Date
11285683 Nov., 2005 7427953
11025421 Jan., 2006 6992622
60619223 Oct., 2004


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Current U.S. Class: 342/373
Current International Class: H01Q 3/00 (20060101)
Field of Search: 342/373-374


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