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United States Patent 7,636,554
Sugar , et al. December 22, 2009
Multiple-input multiple-output radio transceiver

Abstract
A MIMO radio transceiver to support processing of multiple signals for simultaneous transmission via corresponding ones of a plurality of antennas and to support receive processing of multiple signals detected by corresponding ones of the plurality of antennas. The radio transceiver provides, on a single semiconductor integrated circuit, a receiver circuit or path for each of a plurality of antennas and a transmit circuit or path for each of the plurality of antennas. Each receiver circuit downconverts the RF signal detected by its associated antenna to a baseband signal. Similarly, each transmit path upconverts a baseband signal to be transmitted by an assigned antenna.

Inventors: Sugar; Gary L. (Rockville, MD), Masucci; Robert M. (Potomac, MD), Rahn; David G. (Kanata, CA)
Assignee: IPR Licensing, Inc. (Wilmington, DE)
Appl. No.: 10/707,744
Filed: January 8, 2004
Related U.S. Patent Documents
Application Number Filing Date Patent Number Issue Date
10065388 Oct., 2002 6728517
60374531 Apr., 2002
60376722 Apr., 2002
60319336 Jun., 2002
60319360 Jun., 2002
60319434 Jul., 2002
Current U.S. Class: 455/73 ; 455/272; 455/333; 455/552.1
Current International Class: H04B 1/38 (20060101); H04B 1/28 (20060101); H04M 1/00 (20060101)
Field of Search: 455/73,76,78,83,84,86,101,132,133,137,266,269,272,273,324,333,340,552.1,553.1,307,339 375/219 370/276,277,278