Performance Evaluation of Intersatellite Free Space Optical Communication System with Varied Parameters and Transceiver Diversity

Free space optical communication provides a very important method for the satellites orbiting around the earth to communication with each other. In this paper , optical intersatellite link is modelled using optisystem software and then the effect of varying the transmitter power and aperture diameter of transmitter and receiver telescopes is analysed. The results shows that large transmitter power and aperture diameters are needed for communication at high data rates (Gbps) over large distances(5000km) which is in case of leo-leo communication.so, the multiple TX/RX are used to improve the quality of intersatellite optical wireless communication (IsOWC) link. The IsOWC with multiple TX/RX system performance is analysed in terms of received power, eye diagram and Q-factor. The model is designed and simulated using the optisystem 7.0 software. The results of IsOWC with and without multiple TX/RX are also taken into account. The proposed system shows that the introduction of 4 TX/RX makes the communication possible for leo-leo communication over 5000km at the data rate of 5.6Gbps.