As the title suggests, this interaction focuses on three different set-ups of free-space optical (FSO) communication. We will start with the historical background of FSO system and review traditional data transmission techniques for FSO system. In the first set-up, we will discuss a novel modulation scheme for traditional multi-input multi-output configuration, called optical space shift keying (OSSK). Two recent modified versions of OSSK scheme will also be elaborated. In the second set-up, we will cover multipoint-to-multipoint cooperative multiuser FSO system which employs signal-space diversity approach to improve overall performance. The future mobile FSO system and FSO in space claim for broad field-of-view (FoV) for maximization of detected signal and effective tracking capability. Though the connection establishment with wider FoV can offer better signal reception, it also makes the link more prone to jamming activity. Motivated by these scenarios, the third and final set-up of FSO system is entirely concerned with the presence of the jammer in the system.
Dr. Anshul Jaiswal received M.Tech. degree in opto-electronics and optical communication engineering and the Ph.D. degree in optical wireless communication from the Indian Institute of Technology Delhi, New Delhi, India, in 2015 and 2019, respectively. His Ph.D. research work was focused on the design and performance evaluation of a novel optical space shift keying scheme for a free-space optical communication system. He worked as a Visiting Assistant Professor in the Department of Electronics Engineering, Indian Institute of Technology (Indian School of Mines) Dhanbad, India from Aug 2019 to Oct 2019. He is currently an Assistant Professor with the Department of Electronics and Communication Engineering, Indian Institute of Technology Roorkee, India. His research interests include optical wireless communications, multiple-input–multiple-output systems, channel modeling for wireless communications, visible light communication, and Li-Fi. He is a member of IEEE and serves as a reviewer for IEEE, OSA, and Elsevier journals.