High-Resolution Target Detection in TDMA-MIMO FMCW Millimeter-Wave Radar Systems

Ahdoud M. Issa; Marai M. Abousetta

doi:10.32213/cathwd84

Authors

Ahdoud M. Issa Department of Electrical and Computer Engineering, Libyan Academy, Tripoli, Libya Author
Marai M. Abousetta Department of Electrical and Computer Engineering, Libyan Academy, Tripoli, Libya Author

DOI:

https://doi.org/10.32213/cathwd84

Keywords:

TDMA-MIMO Radar, FMCW Millimeter-Wave Radar, Virtual Antenna Array, Iterative Peak Component Elimination (IPCE),, Constant False Alarm Rate (CFAR), Doppler Ambiguity Resolution, Range-Azimuth Spectrum, Phase Error Mitigation, Non-Coherent Accumulation

Abstract

This paper discusses the integration of Time Division Multiple Access (TDMA) with MIMO (Multiple Input Multiple Output) techniques in FMCW millimeter wave (mm-Wave) radar systems for high-resolution target detection and imaging. Through the proposed TDMA-MIMO, we demonstrate that the system can form a virtual antenna array, which significantly improves the angular resolution in range, and Doppler-azimuth-elevation domains. Challenges, including side lobe artifacts, phase errors, and Doppler ambiguity, are mitigated through advanced signal processing methodologies, specifically employing Iterative Peak Component Elimination (IPCE) and Constant False Alarm Rate (CFAR) algorithms. From the experiments carried out, the radar is shown to be able to resolve targets with the use of IQ signal analyses, range-azimuth spectrum imaging, and range-Doppler distribution mapping. moving target detection was accomplished using adaptive thresholding and non-coherent accumulation techniques, showcasing the effectiveness of the proposed framework. These advancements illustrate the system's potential use in scenarios that require precise spatial and velocity parameter estimation, such as security monitoring or aircraft tracking.