Experimental investigation of polarisation modulated free space optical communication with direct detection in a turbulence channel

Experimental investigation of polarisation modulated free space optical communication with direct detection in a turbulence channel

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Binary polarisation shift keying (BPOLSK) has been proposed to mitigate the atmospheric turbulence-induced fading in free space optical (FSO) communication systems. In this study, the Q-factors obtained for the BPOLSK-FSO system are verified in conjunction with theoretical results to confirm the validity of the proposed scheme. The analytical bit error rate (BER) for the BPOLSK and non-return-to-zero on–off keying (NRZ-OOK) schemes are presented. The authors show that the BPOLSK scheme with direct detection offers improved BER performances compared to NRZ-OOK in the presence of weak turbulence, which is inferred from the experimental Q-factor and theoretical BER. For a turbulence variance σ21 of 0.003 and the transmitted optical power of −16.8 dBm, values for Q-factor are ∼11 and ∼8.5 for BPOLSK and NRZ-OOK schemes, respectively. The authors show that the predicted signal-to-noise ratio (SNR) for BPOLSK and NRZ-OOK schemes are ∼13.5 and ∼15 dB, respectively, for a BER of 10−6 and σ21 of 0.01. When σ21 increases to 0.1, ∼8 dB lower values of SNR is required for BPOLSK compared with NRZ-OOK.


    1. 1)
    2. 2)
    3. 3)
      • Khan, M.S., Awan, M.S., Muhammad, S.S.: `Linearity in optical attenuations for free-space optical links in continental fog', Proc. Fifth European Conf. on Antennas and Propagation (EUCAP), 2011, p. 2504–2507.
    4. 4)
      • L. Castanet . (2007) Influence of the variability of the propagation channel on mobile, fixed multimedia and optical satellite communications: JA2410 SatNEx e-book.
    5. 5)
    6. 6)
    7. 7)
      • Flórez, S.A.J.: `Circular polarization and availability in free space optics (FSO) communication systems', 2010 IEEE Latin-American Conf. on Communications (LATINCOM), 2010, p. 1–6.
    8. 8)
    9. 9)
    10. 10)
    11. 11)
      • Noor, N.H.M., Naji, A.W., Al-Khateeb, W.: `Theoretical analysis of multiple transmitters/receivers on the performance of free space optics (FSO) link', 2011 IEEE Int. Conf. on Space Science and Communication (IconSpace), 12–13 July 2011, p. 291–295.
    12. 12)
    13. 13)
    14. 14)
    15. 15)
      • H. Kaushal , V.K. Jain , S. Ka . Effect of atmospheric turbulence on acquisition time of ground to deep space optical communication system. Int. J. Electr. Comput. Eng. , 12 , 730 - 734
    16. 16)
    17. 17)
    18. 18)
      • Warty, C., Yu, R.W.: `Resource allocation using ASK, FSK and PSK modulation techniques with varying ', 2011 IEEE Aerospace Conf., 2011, p. 1–7.
    19. 19)
    20. 20)
    21. 21)
    22. 22)
      • L.C. Andrews , R.L. Phillips . (2005) Laser beam propagation through random media.
    23. 23)
    24. 24)
      • L.C. Andrews , R.L. Phillips , C.Y. Hopen . (2001) Laser beam sintillation with applications.
    25. 25)
      • S.V. Kartalopoulos . (2004) Optical bit error rate: an estimation methodology.

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