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High-resolution range profile reconstruction method for terahertz FMCW radar.

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    This study introduces a software method to improve range resolution in Terahertz (THz) testing using frequency modulated continuous wave (FMCW) systems. The new technique enhances signal parameter extraction for more precise THz imaging.

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    Area of Science:

    • Physics
    • Electrical Engineering
    • Signal Processing

    Background:

    • Terahertz (THz) testing using frequency modulated continuous wave (FMCW) systems suffers from limited range resolution.
    • Accurate range profiling is crucial for effective THz signal analysis and detection.

    Purpose of the Study:

    • To develop a software-based method for reconstructing range profiles in THz-FMCW systems.
    • To significantly improve range resolution and signal parameter extraction capabilities.
    • To enhance the precision and flexibility of range profile reconstruction for subsequent detection.

    Main Methods:

    • Utilized the multiple signal characterization (MUSIC) algorithm to qualitatively determine higher-resolution range profiles and obtain initial echo values.
    • Applied multiple Gaussian functions for fitting echoes within the original range profile.
    • Extracted key echo parameters: amplitude, range, and width.

    Main Results:

    • Demonstrated qualitative and quantitative improvements in range resolution through simulated and real THz data.
    • Successfully extracted accurate signal parameters, enabling precise range profile reconstruction.
    • Validated the method's effectiveness using a 150-220 GHz FMCW imager.

    Conclusions:

    • The proposed software method offers a significant advancement for THz-FMCW testing by overcoming range resolution limitations.
    • Accurate parameter extraction and flexible range profile reconstruction facilitate improved detection procedures.
    • The technique proves effective for both simulated and real-world THz imaging applications.