WI Seminar Series – Intelligent Adaptive and Reconfigurable Circuits and Systems for Wireless Coexistence between Radar, Communications, and Passive Sensing
December 7, 2022 at 3:30 pm
319 DeBartolo Hall
Charles Baylis, Ph.D.
Professor of Electrical and Computer Engineering
Baylor University
| Abstract: Increasing use of wireless devices is causing more potential for spectral interference between various wireless applications, including communications, radar, and passive sensing, among others. Research in intelligent, reconfigurable circuitry and systems to allow coexistence between different wireless systems is discussed. Reconfigurable circuits for radar transmitters, capable of high power handling, can allow radar transmitters to shift their frequency and adjust the power amplifier load impedance within hundreds of milliseconds to maximize transmission range “on the fly” and from pulse to pulse. Integration of the reconfigurable circuitry into real-time spectrum-sharing platforms is described. An additional study to adaptively protect passive weather radiometer systems near 24 GHz from 5G transmission interference is also discussed. A spectral broker is employed to assign spectral, spatial, and temporal resources in real-time. In response to these limitations, an Artificially Intelligent Power Amplifier Array (AIPAA) is reconfigured to allow a 5G wireless system to adapt in frequency and transmission direction, maximizing its own range and efficiency while avoiding interference with the radiometers. A novel in-situ measurement technique, capable of evaluating antenna currents for calculation of array transmit pattern, is described. A test bed is currently under development to assess the ability of the broker and reconfigurable circuitry to coexist with weather radiometers, designed to sense atmospheric water vapor near 24 GHz. A planned framework for multidisciplinary research to instill adaptive and reconfigurable technology in spectrum use from the policy to circuit and device levels is discussed. |
| Bio: Dr. Charles Baylis is a Professor of Electrical and Computer Engineering at Baylor University. At Baylor, he directs the Wireless and Microwave Circuits and Systems Program, which he co-founded in 2008 to provide wireless and microwave education and research in a caring, Christian environment. His research in reconfigurable circuit and system technologies for adaptive spectrum systems has been funded by the Army Research Laboratory, National Science Foundation, Office of Naval Research, and Naval Research Laboratory. |