DPSK and Manchester coding for Inter-satellite Optical Wireless Communication systems

Abstract

With the evolving technology and ever-increasing demand for high speed communication, optical communication systems have provided a major breakthrough and paved the way for high quality, low noise data transfer. Optical communication systems have also developed from lengthy prolonged fibres to strong hybrid wireless systems. These wireless systems, also known as free space optics (FSO) technology, are efficient and powerful and counter many problems present within traditional microwave systems. One of the most important applications of FSO technology is the scope to utilize it in satellite applications. These systems are known as inter-satellite optical wireless communication (IsOWC) systems and provide higher bandwidth, low power, compact size etc. In this work, we have proposed an IsOWC system which uses DPSK modulation with Manchester coding. The performance of the system is analyzed for with Manchester and without Manchester coding. Manchester coding provides self synchronization of the transmitted bits. Thus performs better compared to the system without Manchester coding. The system will be very much useful for high speed communication applications among satellites.