1. Department of Electronics Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand 826 004, India
2. Electronics and Communication Engineering Department, Madan Mohan Malviya University of Technology, Gorakhpur, Uttar Pradesh 273 010, India
3. Department of Electronics and Communication Engineering, Indian Institute of Information Technology, Ranchi, Jharkhand 834 010, India