Direction estimation and tracking of rapidly moving RF emitters
305 viewsDOI:
https://doi.org/10.54939/1859-1043.j.mst.107.2025.3-12Keywords:
Circularly polarized microstrip antenna; MUSIC algorithm; ESPRIT algorithm; DOA; SDR; Kalman filter.Abstract
Accurately localizing dynamic targets in complex and rapidly changing environments, such as unmanned aerial vehicles (UAVs), mobile platforms, or unstable moving objects-poses significant challenges in both civilian and military applications. This paper proposes an approach that integrates software-defined radio (SDR) technology with circularly polarized microstrip antennas to enhance localization performance under harsh conditions, including weak signals, multipath propagation, and disturbances caused by rapid motion. A simulation model is developed, and experimental analyses are conducted using an improved MUSIC algorithm for direction-of-arrival (DOA) estimation, combined with a second-order filtering technique. The results demonstrate a strong correlation between the simulated data and practical measurements, confirming the effectiveness of the proposed method.
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