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Ranging and velocimetry measurements by phase-based MTCW lidar.

Mustafa Mert Bayer, Ozdal Boyraz

    Optics Express
    |May 14, 2021
    PubMed
    Summary
    This summary is machine-generated.

    A new algorithm enhances multi-tone continuous wave (MTCW) lidar for simultaneous single-shot ranging and velocity measurements. This method extracts phase and Doppler shift information for improved lidar performance.

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    Area of Science:

    • Optics and Photonics
    • Signal Processing
    • Remote Sensing

    Background:

    • Multi-tone continuous wave (MTCW) lidar systems are used for distance and speed measurements.
    • Current MTCW lidar systems face limitations in simultaneously achieving high-resolution ranging and velocimetry in a single shot.

    Purpose of the Study:

    • To introduce a complementary phase detection algorithm to improve MTCW lidar capabilities.
    • To enable single-shot simultaneous ranging and velocimetry measurements with enhanced accuracy.

    Main Methods:

    • Developed a novel phase detection algorithm for MTCW lidar.
    • Utilized Doppler-shifted radio frequency (RF) tones to extract phase and velocity information.
    • Performed numerical simulations and experimental validation with a 6-tone MTCW lidar system.

    Main Results:

    • Demonstrated simultaneous extraction of phase (ranging) and velocity information from Doppler shifts.
    • Achieved a velocity resolution of 8.08 ± 0.8 cm/s.
    • Obtained a range measurement of 111.9 cm with a resolution of ±0.75 cm.

    Conclusions:

    • The proposed algorithm effectively enhances MTCW lidar for simultaneous ranging and velocimetry.
    • Velocity resolution is fundamentally limited by frequency resolution, while ranging resolution depends on temporal resolution.
    • The study validates the algorithm's feasibility through numerical and experimental evidence.