1
Randy Ekl
Stephen L Kuffner, Ramy S Ayoub, John M Belcea, Gregory J Buchwald, Lynn D Dann, Mario F Derango, Lawrence M Ecklund, Randy L Ekl, Michael S Johnson, S David Silk: Communications system for exchanging spectrum sensing measurements through a drop box and method of using same. Motorola, Motorola, October 1, 2009: US20090245119-A1

A communications system and method for exchanging spectrum usage information through a drop box (100) includes one or more central stations (101) that defines a region of operation. A central drop box (102) is associated with the central station (101) for providing a database of spectrum usage infor ...


2
Stephen L Kuffner, Scott N Carney, Eric L Krenz: Method, dual rectangular patch antenna system and radio for providing isolation and diversity. Motorola, Darleen J Stockley, January 23, 1996: US05486836 (53 worldwide citation)

The present invention provides a method, dual rectangular patch antenna system, and radio for providing isolation and diversity while eliminating the need for a diplexer or a second transmit/receive switch. The dual rectangular patch antenna system comprises a first rectangular patch antenna (202), ...


3
Steven F Gillig, Stephen L Kuffner: Method and apparatus for determining appropriate channels for communication. Motorola, Kenneth Haas, June 22, 2010: US07742764 (48 worldwide citation)

During operation of a secondary communication system 100, a device will perform spectrum sensing of certain channels (either by itself or as part of a group of nodes 104). When activity is found on a channel from a primary user, other devices will be notified that the channel is not available for us ...


4
Timothy J Collins, David P Gurney, Stephen L Kuffner, Richard S Rachwalski: Method and apparatus for multiple frequency RFID tag architecture. Motorola, July 24, 2007: US07248165 (47 worldwide citation)

The present invention provides a multi-band, multi-mode RFID tag that uses a single antenna structure and integrated circuit to provide asset location information at any stage of a supply chain. The unified tag design operates at multiple frequencies (or bands) using the antenna structure, for examp ...


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Gregory J Buchwald, Steven F Gillig, S David Silk, Lawrence M Ecklund, Stephen L Kuffner: Method and apparatus for determining appropriate channels for communication. Motorola, January 27, 2009: US07483700 (28 worldwide citation)

During operation of a secondary communication system, cells (106) are formed by a plurality of localized nodes (104) to alert other nodes within the cell of frequencies which must be protected or otherwise avoided. All nodes within the cell monitor a differing subset of all frequencies available, an ...


7
Stephen L Kuffner: Tunable duplexer. Motorola, Cardinal Law Group, Lawrence J Chapa, May 1, 2007: US07212789 (21 worldwide citation)

The method and apparatus herein identifies tunable duplexer in a communication system. The tunable duplexer includes a tunable receiver filter, a tunable transmitter filter, a variable receiver phase shifter, and variable transmitter phase shifter. Each filter and phase shifter is optimized based on ...


8
Xiang Chen, Xiaowei Jin, James F Kepler, Stephen L Kuffner, Peijuan Liu, Ravindra P Moorut: System and method for minimizing inter-communications system mobile station-to-mobile station interference. Motorola, December 28, 2010: US07860521 (10 worldwide citation)

A system and method for minimizing inter-communications system mobile-to-mobile station interference includes a plurality of base stations (BS A and BS B) and a plurality of mobile stations (MS A and MS B) each communicating with a base station using a first mode of communication. A first mobile sta ...


9
Apoorv Chaudhri, David P Gurney, Stephen L Kuffner, Yadunandana N Rao, Matthew E Simms: Method and apparatus for optimizing spectrum utilization by a cognitive radio network. Motorola Solutions, Barbara R Doutre, March 20, 2012: US08140085 (9 worldwide citation)

A technique for a secondary communication system to utilize spectrum designated to another (or primary) communication system is provided. By ranking a plurality of secondary base stations based on base station transmit power, calculated required transmit power and path loss, a set of criteria is dev ...


10
Gregory J Buchwald, Lawrence M Ecklund, Richard S Rachwalski, S David Silk, Stephen L Kuffner: Method and apparatus for allowing communication units to utilize non-licensed title spectrum. Motorola, July 3, 2007: US07239624 (9 worldwide citation)

The presence of the non-television transmission within a channel is used to indicate that secondary non-licensed usage of the channel is permitted. Specifically, if secondary users incorporate the means to identify the unique modulation signature of the secondary user, decoding of a beacon signal ma ...