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Free Space Optical Communication Channel Modelling with PIN Receiver

  • Suman DebnathEmail author
  • Bishanka Brata Bhowmik
  • Mithun Mukherjee
Conference paper
Part of the Advances in Intelligent Systems and Computing book series (AISC, volume 767)

Abstract

Free space optical (FSO) communication is a mode of optical communication, where the data transmission channel is established via free space, rather using conventional optical fibre in optical communications. The transmission uses the free space (e.g. air) as the medium, a low-power light amplification by stimulated emission of radiation (LASER) as a transmitter and a semiconductor as the receiver. As the channels in optical fibre communication (OFC) and FSO communication are different, the losses and noises are also different in both cases. The quality of optical signal transmission through wireless depends on the atmospheric characteristics, like rain, wind, snowfall, fog, temperature, sunlight, light from other sources and turbulence. The aim of this publication is to model the channel for the optical signals through the air by considering all the losses and noises over the medium. The noises in the receiver, e.g. shot noise and thermal noise, are also analysed with on–off keying and direct detection method and have shown the effects on the output electrical signal. Bit error rate (BER) versus distance is obtained considering the above noises and losses over the channel and at the receiver. Finally, a complete FSO system is simulated by combining both the channel losses and noises at receiver.

Keywords

Free space optical communication Channel modelling Atmospheric losses Turbulence On–off keying Pin photodetector Receiver noise 

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Copyright information

© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  • Suman Debnath
    • 1
    Email author
  • Bishanka Brata Bhowmik
    • 1
  • Mithun Mukherjee
    • 2
  1. 1.Department of Electronics & Communication EngineeringTripura UniversityTripuraIndia
  2. 2.Guangdong Provincial Key Lab of Petrochemical Equipment Fault DiagnosisGuangdong University of Petrochemical TechnologyMaomingChina

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