Transmission of Information Data in Optical Channels: Atmospheric and Fiber Optics

This chapter provides a comparison between two stochastic approaches for optical and radio communication links, the classical and the approximate, by analyzing changes in the capacity as a function of Ricean parameter, i.e. as a function of different conditions of optical wireless channel. It also provides a detailed analysis of the key parameters of the optical atmospheric channel and the information data, based on the approximate approach. The chapter analyzes effects of fading on bit error rate conditions within the turbulent wireless communication link consisting of weak and strong turbulences. Wireless or fiber optic communication systems use well‐known modulation techniques for encoding the received signal. The chapter describes the case of amplitude shift keying modulation, which deals with the signal strength or power as a function of time, as a common method of signal processing usually used in optical detectors.