United States Patent 7,545,778
Sugar , et al. June 9, 2009
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Apparatus for antenna diversity using joint maximal ratio combining
Abstract
A transceiver using composite beamforming technique is provided wherein a first communication device has a plurality of antennas and the second communication has a plurality of antennas. When the first communication device transmits to the second communication device, the transmit signal is multiplied by a transmit weight vector for transmission by each the plurality of antennas and the transmit signals are received by the plurality of antennas at the second communication device. The optimum transmit weight vector and receive weight vector for communication between the first and second communication devices is determined so that there is effectively joint or composite beamforming between the communication devices.
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Inventors: Sugar; Gary L. (Rockville, MD), Vaidyanathan; Chandra (Bethesda, MD), Tesfai; Yohannes (Falls Church, VA)
Assignee: IPR Licensing, Inc. (Wilmington, DE)
Appl. No.: 11/231,161
Filed: September 20, 2005
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Related U.S. Patent Documents
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Application Number Filing Date Patent Number Issue Date
10695229 Oct., 2003 6965762
10174728 Feb., 2004 6687492
60365797 Mar., 2002
60361055 Mar., 2002
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Current U.S. Class: 370/335 ; 342/372; 370/334; 370/342; 375/148; 455/276.1
Current International Class: H04B 7/216 (20060101)
Field of Search: 370/329,331,332,334,335,342 375/148 342/372 455/276.1
