1. Department of Electronics and Communication Engineering, Jawaharlal Nehru Technological University Anantapur, Ananthapuramu 515002 Andhra Pradesh, India
2. Department of Electronics and Communication Engineering, G. Pullareddy Engineering (Autonomous) College, Kurnool, Nandyal Road, Kurnool, Andhra Pradesh, India
3. Affiliated to Jawaharlal Nehru Technological University, Anantapur, Ananthapuramu, India