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Abstract
In this paper, the performance of improved modified switching (IMS) scheme for the hybrid FSO/RF system is evaluated under the mixture composite irradiance channel fading model with pointing errors. Here, the combined effect of atmospheric turbulence and pointing error in optical domain is modelled by the mixture gamma (MG) distribution, which is a more accurate model in comparison to “K” and “Gamma” distributions. Further, in RF communication the fading channel is modeled as Nakagami “m” distribution. The average data rate, outage probability and error performances of the hybrid FSO/RF system under consideration are evaluated and compared with those of existing hard switching scheme (HS). For a meaningful comparison, IMS and HS schemes are considered in two different scenarios. Firstly, the average data rate of both the switching schemes are made identical by an appropriate choice of RF/FSO SNR thresholds. The two schemes are then compared on the basis of the other two performance metrics i.e. outage and BER. Secondly, the outage probabilities are made identical, and comparison is made on the basis of BER and average data rate.
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Notes on contributors
S. K. Shrivastava
Shreesh Kumar Shrivastava holds master’s degree in telecommunication technology from RGPV University, Bhopal, India in 2007. He has 8 years teaching experience at UG level. He is currently pursuing a PhD degree in electronics and communication engineering at the University of Delhi, New Delhi. His research interests include free space optics, wireless communication, and multicarrier CDMA. Email: [email protected]
S. Sengar
Sujata Sengar received her BSc Engg (Hons) and MSc Engg (Hons) degree in electronics and communication engineering from Aligarh Muslim University, Aligarh, India in 1988 and 1990. She holds a doctoral degree in wavelet based multicarrier transmission system from the Indian Institute of Technology, Delhi (IITD), India, in 2014. From 1990 to 1991 she worked as scientist fellow at CEERI, Pilani. From 1992 to 1994 she worked at lecturer in Department of Electronics and Communication Engineering, TITS, Bhiwani. From 1994 to 1997 she worked at lecturer in Department of Electronics and Communication Engineering, CR State College of Engineering, Murthal. From 1997 to 1999, she worked as a lecturer in the Department of Electronics Communication and Computer, at REC Kurukshetra and in 1999, she joined as faculty at Netaji Subhas Institute of Technology, Delhi. Presently, she is working as professor in the Division of Electronics and Communication Engineering, Netaji Subhas University of Technology (Formerly Netaji Subhas Institute of Technology), Delhi, India. Her area of interest is speech processing, signal processing, wireless communication.
S. P. Singh
Shree Prakash Singh received his BE degree in electronics and communication engineering from MMM Engineering College, Gorakhpur, India, in 1990 and MTech degree from REC, Kurukshetra, India, in 1994.He holds a doctoral degree in optical networks from the Indian Institute of Technology, Delhi (IITD), India, in 2007. During 1994–2000, he worked as lecturer in the Department of Electronics and Computer Engineering at National institute of Technology (formerly Regional Engineering College), Kurukshetra. In October 2000, he joined as lecturer in the Department of Electronics, Netaji Subhas Institute of Technology (formally known as Delhi Institute of Technology, New Delhi). Presently, he is professor at the Division of Electronics and Communication Engineering, Netaji Subhas University of Technology (Formerly Netaji Subhas Institute of Technology), New Delhi. His current area of research is optical networks, optical wireless communication. Email: [email protected]