1. Department of Electrical and Computer Engineering, Missouri University of Science and Technology, Rolla, MO, USA
2. Electrical Engineering Department, Sukkur IBA University, Sukkur, Sindh, Pakistan
3. Communications Laboratory, Department of Electronics, Quaid-i-Azam University, Islamabad, Pakistan
4. National Engineering Laboratory for Fiber Optic Sensing Technology, Wuhan University of Technology, Wuhan, China