1. Department of Electronics and Communication Engineering, National Institute of Technology Silchar, Silchar, India
2. Department of Electronics and Communication Engineering, Vaageswari College of Engineering, Karimnagar, Telangana, India
3. Antenna and Optical Department, Institute for Infocomm Research, A*STAR, Singapore, Singapore
4. Department of Electrical and Computer Engineering, California State University, Northridge, USA