Effect of aperture averaging and spatial diversity on capacity of optical wireless communication systems over lognormal channels

Rahul Kaushik; Vineet Khandelwal; Roop Chand Jain

doi:10.3103/S0735272716120013

Authors

Rahul Kaushik Jaypee Institute of Information Technology, Noida, India
Vineet Khandelwal Jaypee Institute of Information Technology, Noida, India
Roop Chand Jain Jaypee Institute of Information Technology, Noida, India

DOI:

https://doi.org/10.3103/S0735272716120013

Keywords:

optical wireless communication, average channel capacity, aperture averaging, diversity reception, lognormal distribution

Abstract

In this paper average channel capacity of optical wireless communication system with aperture averaging and diversity reception over lognormal channels is evaluated using a simple approximate closed form expression. The qualitative improvement in channel capacity is compared and investigated for various turbulence mitigation techniques: namely aperture averaging, diversity techniques such as maximal ratio combining and equal gain combining. Based on our study it has been found that aperture averaging gives reasonably improved performance as compared to both types of diversity reception beyond certain turbulence strength. However, irrespective of turbulence strength, substantial improvement in capacity may be achieved with array of direct detection receivers. Results obtained using the proposed expressions are in excellent agreement with those based on Monte Carlo simulations.

Author Biographies

Rahul Kaushik, Jaypee Institute of Information Technology, Noida

Rahul Kaushik received his B.Tech. (Electronics and Telecommunication Engineering) and M.Tech. (Electronics Engineering) degrees from University of Allahabad, India in 2001 and 2003 respectively. Presently, he is pursuing Ph.D. degree from Jaypee Institute of Information Technology, Noida, India. He is working as an Assistant Professor in the department of Electronics and Communication Engineering at Jaypee Institute of Information Technology (JIIT), Noida, India since 2007. His research interests lie in the areas of Optical Communication. He is currently working in the area of Wireless (Free Space) Optical Communication.

Vineet Khandelwal, Jaypee Institute of Information Technology, Noida

Dr. Vineet Khandelwal has been working as Assistant Professor in department of Electronics and Communication Engineering, Jaypee Institute of Information Technology, Noida, India. He received his B.E. degree in Electronics & Communication Engineering from Madhav Institute of Technology and Science, Gwalior, India in 1999, M.Tech. in Signal Processing from Netaji Subhas Institute of Technology, New Delhi, India in 2001. He has recently completed his Ph.D. from School of Computer and System Sciences, Jawaharlal Nehru University, New Delhi, India and is working in the area of performance modeling of fading channels.

Roop Chand Jain, Jaypee Institute of Information Technology, Noida

Dr. R. C. Jain has obtained BE (Electronics & Communication), and ME (Microwaves) degrees from University of Roorkee, Roorkee , India ( now IIT, Roorkee) in the years 1970 and 1978 respectively and Ph.D. in Electrical Engineering from University of Alberta, Canada as a Commonwealth Scholar in 1988. He has been working as Professor and Head in the department of Electronics and Communication Engineering at Jaypee Institute of Information Technology (JIIT), Noida, India since 2007. Prior to joining JIIT, he worked as Professor in Electronic Engineering Department, Birla Institute of Technology and Science, Pilani for about 17 years. He has also worked in the Department of Information and Communications, Gwangju Institute of Science and Technology (GIST), South Korea as foreign IT Professor for 03 years.He is recipient of Canadian Commonwealth Scholarship and Fellowship, 1983. He was awarded CDIL award of IETE, India in 1994, K S Krishnan memorial award of IETE in 1999 and IETE student’s Journal award in 2006 for his papers published in IETE Journals. He is a Fellow of the Institution of Electronics and Telecommunications Engineers (IETE), India. His areas of interest are: Microwave Engineering and Communication Systems.

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