1. Electrical Engineering and the director of the Autonomous Systems Laboratory, University of North Texas, Denton, Texas, USA
2. Communications Department, Institute of Communications and Navigation at German Aerospace Research, Wessling, Germany
3. Professor, University of South Carolina, Columbia, South Carolina, USA
4. Department of Electrical and Computer Engineering, North Carolina State University, Raleigh, North Carolina, USA
5. Department of Electrical Communication Engineering, Indian Institute of Science, Bangalore, India
6. Master Researcher, Ericsson Research, Finland