My area of expertise is in software radios, smart antennas, wireless networks and communications signal processing. I have authored, co-authored, or co-edited ten books and proceedings, contributed to six books, and authored or co-authored over two hundred journal and conference papers. My first text book, Software Radios: A Modern Approach to Radio Design, is one of the first books devoted exclusively to software radios. My latest book, An Introduction to Ultra Wideband Communication Systems is considered one of the most comprehensive books on Ultra WideBand (UWB) communications. I am currently writing two text books, one on cellular radio systems and the other on SDR and cognitive radio and these books are expected to be published in 2014 and 2015, respectively.
Currently I am the principle investigator on an NSF project to examine enforcement and regulatory technologies for spectrum sharing. I have been PI or co-PI on 97 different sponsored research contracts
I am also a co-founder of a commercial venture called Cognitive Radio Technologies (CRT), a company that is developing cognitive radio technologies produced at Virginia Tech for commercial and military applications; and Federated Wireless (formerly Allied Communications) a company that is commercializing 5G wireless systems; and for PFP Cybersecurity, a company that specializes in security for embedded systems, including Android platforms. I have served as a consultant for approximately 30 organizations and more recently was engaged in consulting regarding the AT&T – T-Mobile merger and the band plan strategy for the upcoming 600 MHz auctions. I have served on the technical advisory boards for approximately six companies and have provided advice to White House and Senate staffers regarding wireless technology and policy issues. Most recently, I have served on the President’s Council of Advisor in Science and Technology (PCAST) Working Group on how to transition federal spectrum for commercial economic benefits.
In November, I was interviewed by CTIA's "Wonder of Wireless" series. YouTube videos have embedded the videos for your convenience:
The motivation of this project is the development of a new radio that is supporting the research efforts for the emerging "Internet of Things" (IOT). IOT has not developed specific standards, but is expected to revolutionize the industry. Through this research project, we hope to use a cognitive RF front-end control to simplify radio design and implement a physical layer of 4G LTE as an example IOT radio.
Emerging spectrum sharing applications need a channel sounder that is low cost and light-weight, with enough time resolution. It is desirable to be software programmable in the back end with a single control point. We plan to develop a mm-wave version to address the need of 5G communications.
COMWITS enables medical DoD applications to ensure the integrity of new innovations to provide essential intelligence, surveillance, and reconnaissance capabilities. The testbed system can also being used by external researchers and industries through collaboration as well as undergraduate students through the NSF Research Experience for Undergraduates program.
The ability to protect the operational information of federal users is the major hurdle preventing the federal government from sharing spectrum bands. This project is to try and develop threat mitigation techniques and quantify their effectiveness in preserving operation privacy in database enabled spectrum sharing and systems operations.
This research will enable wireless communications under extremely harsh communication conditions, such as sophisticated adversarial jamming and augment existing anti-jam mechanisms such as adaptive nulling.
Virginia Tech researchers also plan to identify approaches to mitigate the most likely types of interference to 4G LTE cellular systems