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    Area of Science:

    • Photonics
    • Radar Systems
    • Microwave Engineering

    Background:

    • Traditional radar systems face limitations in range resolution and performance.
    • Multiple-Input-Multiple-Output (MIMO) radar architectures offer enhanced capabilities.
    • Microwave photonics provides a platform for high-bandwidth signal generation and processing.

    Purpose of the Study:

    • To propose and demonstrate a novel photonics-based MIMO radar system.
    • To leverage wavelength-division-multiplexed broadband microwave photonic signal generation for improved radar performance.
    • To achieve ultra-high range resolution and explore extended radar applications.

    Main Methods:

    • Development of a photonics-based signal generation and processing framework.
    • Implementation of a 2x2 MIMO radar configuration utilizing wavelength-division multiplexing.
    • Utilizing a 4-GHz bandwidth per transmitter and a 100 MSa/s sampling rate receiver.
    • Experimental validation of multi-channel signal generation and processing.

    Main Results:

    • Demonstrated ultra-high range resolution due to large operation bandwidth.
    • Achieved improved radar performance and extended applications compared to monostatic radar.
    • Verified the feasibility of low-speed electronics for real-time signal processing.
    • Successfully demonstrated direction of arrival (DOA) estimation and target positioning experiments.

    Conclusions:

    • The proposed photonics-based MIMO radar system is feasible and offers significant advantages.
    • The system enables ultra-high range resolution and enhanced performance through photonic signal processing.
    • The architecture supports advanced applications like DOA estimation and target positioning with real-time processing capabilities.