BER Performance of FSO System

  • Hemani Kaushal
  • V. K. Jain
  • Subrat Kar
Part of the Optical Networks book series (OPNW)


The turbulence in an FSO link causes fluctuations in the intensity and the phase of the received signal. These fluctuations ultimately lead to the degradation in the link error probability and limit the system performance. In this chapter, bit error rate (BER) performance of coherent subcarrier (SC-BPSK and SC-QPSK) and noncoherent (OOK and \(\mathbb{M}\)-PPM) schemes in turbulent atmospheric environment have been analyzed. Multilevel modulation schemes which are more bandwidth efficient are also discussed in this chapter. Section 5.1 gives the system model which includes a brief description on transmitter, atmospheric channel, and receiver. In Sect. 5.2, the BER performance of FSO system in atmospheric turbulent channel for both coherent (SC-BPSK and SC-QPSK) and noncoherent (OOK and \(\mathbb{M}\)-PPM) modulation schemes have been analyzed. Other bandwidth-efficient modulation techniques like pulse- amplitude modulation (PAM), differential pulse-position modulation (DPPM), and differential amplitude pulse position modulation (DAPPM) are discussed in this section. Finally, in the last section, BER performance of different modulation schemes are summarized.


Modulation Scheme Packet Error Rate Pulse Amplitude Modulation Bandwidth Efficiency Pulse Position Modulation 


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Copyright information

© Springer (India) Pvt. Ltd. 2017

Authors and Affiliations

  • Hemani Kaushal
    • 1
  • V. K. Jain
    • 2
  • Subrat Kar
    • 2
  1. 1.Electronics and CommunicationThe NorthCap UniversityGurgaonIndia
  2. 2.Electrical EngineeringIndian Institute of Technology DelhiNew DelhiIndia

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