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    Area of Science:

    • Electrical Engineering
    • Radar Systems
    • Optical Communications

    Background:

    • Coherent multi-band MIMO radar systems offer advanced capabilities but face challenges with distributed antenna architectures.
    • Distributing radio frequency (RF) signals over optical fiber links introduces phase noise (PN) that can degrade system performance.

    Purpose of the Study:

    • To numerically evaluate the performance impact of RF signal distribution via optical fiber in a coherent multi-band MIMO radar system.
    • To develop a model for quantifying phase noise (PN) induced by optical fiber transmission.
    • To assess the system's robustness under various fiber lengths and phase noise conditions.

    Main Methods:

    • Numerical evaluation using Monte Carlo simulations.
    • Modeling of phase noise (PN) contributions from chromatic dispersion (CD), double Rayleigh scattering (DRS), and mechanical vibrations.
    • Analysis of key performance indicators (KPIs) for different standard single-mode fiber (SSMF) lengths.

    Main Results:

    • Phase noise (PN) is primarily caused by chromatic dispersion (CD), double Rayleigh scattering (DRS), and mechanical vibrations.
    • Significant performance degradation in a shipborne scenario occurs beyond approximately 20 km of fiber link length.
    • The centralized acquisition and processing approach demonstrates excellent robustness against long fiber links and economical RF oscillators.

    Conclusions:

    • The proposed centralized radar architecture is resilient to phase noise introduced by long optical fiber links.
    • Economical RF oscillators can be utilized without compromising system performance significantly.
    • The findings support the feasibility of deploying distributed coherent multi-band MIMO radar systems using optical fiber infrastructure.