TY - JOUR
T1 - Impact of Channel Correlation on Different Performance Metrics of OSSK-Based FSO System
AU - Priyadarshani, Richa
AU - Jaiswal, Anshul
AU - Bhatnagar, Manav R.
AU - Bohata, Jan
AU - Zvanovec, Stanislav
AU - Ghassemlooy, Zabih
N1 - Research funded by Ministry of Electronics and Information technology, Brigadier Bhopinder Singh Chair, Indian Institute of Technology-Delhi, New Delhi, India
PY - 2020/3
Y1 - 2020/3
N2 - In this paper, we study the impact of correlation on the bit error rate (BER) and the channel capacity of a free-space optical (FSO) multiple-input-multiple-output (MIMO) system employing optical space shift keying (OSSK) over a fading channel. In order to study a practical correlated channel, we consider the effect of channel correlation due to both small-and large-scale eddies and show that the use of OSSK over correlated FSO channel can lead to an improved system performance with increasing correlation level of upto 0.9. In this work, we first develop an analytical framework for different performance metrics of the OSSK multiple-input single-output system with correlation and then extend our investigation by proposing an asymptotically accurate mathematical framework for MIMO. We also validate all the analytical results using MATLAB simulations. Finally, we develop an experimental setup of FSO with two correlated links to study the throughput and latency of the links at different turbulence levels.
AB - In this paper, we study the impact of correlation on the bit error rate (BER) and the channel capacity of a free-space optical (FSO) multiple-input-multiple-output (MIMO) system employing optical space shift keying (OSSK) over a fading channel. In order to study a practical correlated channel, we consider the effect of channel correlation due to both small-and large-scale eddies and show that the use of OSSK over correlated FSO channel can lead to an improved system performance with increasing correlation level of upto 0.9. In this work, we first develop an analytical framework for different performance metrics of the OSSK multiple-input single-output system with correlation and then extend our investigation by proposing an asymptotically accurate mathematical framework for MIMO. We also validate all the analytical results using MATLAB simulations. Finally, we develop an experimental setup of FSO with two correlated links to study the throughput and latency of the links at different turbulence levels.
KW - Arbitrary correlation
KW - bit error rate
KW - discrete-input continuous-output (DCMC) capacity
KW - free-space optical (FSO) communications
KW - Gamma-Gamma (ΓΓ) distribution
KW - Green’s matrix
KW - MIMO
KW - optical space shift keying
U2 - 10.1109/TWC.2019.2955449
DO - 10.1109/TWC.2019.2955449
M3 - Article
VL - 19
SP - 1593
EP - 1609
JO - IEEE Transactions on Wireless Communications
JF - IEEE Transactions on Wireless Communications
SN - 1536-1276
IS - 3
ER -