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Performance of optical space shift keying under jamming.

Isha Chauhan, Pratiti Paul, Manav R Bhatnagar

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    |March 10, 2021
    PubMed
    Summary

    This study analyzes jamming effects in free-space optical (FSO) communication systems using optical space shift keying (OSSK). A 2x1 MISO-OSSK system mitigates jamming and atmospheric turbulence, deriving a bit error rate (BER) expression.

    Area of Science:

    • Optical communication systems
    • Wireless communication technologies
    • Signal processing

    Background:

    • Free-space optical (FSO) communication systems are susceptible to atmospheric turbulence (AT) and jamming.
    • Channel fading in saturated AT follows a negative exponential probability density function (PDF).
    • Jammers also experience saturated AT, with jamming signals following a negative exponential PDF.

    Purpose of the Study:

    • To investigate the impact of jamming on FSO communication systems employing optical space shift keying (OSSK).
    • To analyze the performance of a multiple-input single-output (MISO) FSO system in mitigating jamming and AT effects.
    • To derive a closed-form expression for the bit error rate (BER) of the considered system.

    Main Methods:

    • Utilizing a 2x1 MISO-OSSK FSO system configuration.

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  • Deriving a closed-form expression for the bit error rate (BER).
  • Performing numerical analysis of jammer effects under gamma-gamma (GG) fading channels.

    • Main Results:

    • A closed-form BER expression was derived for the 2x1 MISO-OSSK FSO system under saturated AT and jamming.
    • The MISO configuration effectively mitigates the detrimental effects of both jamming and channel fading.
    • Numerical simulations provided insights into jammer performance under GG fading.

    Conclusions:

    • The MISO-OSSK FSO system offers a viable solution for robust communication in the presence of jamming and atmospheric turbulence.
    • The derived BER expression is crucial for performance evaluation and system design.
    • Further investigation into jammer effects under various fading conditions is warranted.