1. Faculty of Telecommunications Technical University of Sofia,Sofia,Bulgaria
2. Silicon Institute of Technology,Department of Electronics and Communication Engineering,Bhubaneswar,India
3. School of Physical Sciences Banasthali Vidyapith,Rajasthan,India
4. Ghani Khan Choudhury Institute of Engineering and Technology,Department of Electronics and Communication Engineering,West Bengal,India
5. Research&Development&Innovation Consortium (RDIC),Sofia,Bulgaria