2D Millimeter-Wave SAR Imaging with Automotive Radar

Year 2024, Volume: 5 Issue: 1, 68 - 77, 21.06.2024

Bengisu Yalçınkaya Gökdoğan Remziye Büşra Çoruk Elif Aydın Ali Kara

https://doi.org/10.53525/jster.1456610

Abstract

In recent years, millimeter wave (mmWave) frequency modulated continuous wave (FMCW) radars have gained popularity in radar imaging applications, coinciding with the advancement of mmWave technology. However, high cost and integration complexity still remain as issues in cases where the target aperture is large. This work introduces a low-cost, low-complexity, and easy-to-implement two-dimensional (2D) mmWave synthetic aperture radar (SAR) system. A commercial-off-the-shelf (COTS) mmWave FMCW radar sensor operating in the frequency range of 77-81 GHz is employed. A large mechanical scanning system which can move in both vertical and horizontal directions is constructed and integrated with the radar sensor. Developing a graphical user interface (GUI), an automatic movement of the scanner is achieved. Experimental measurements are taken in a laboratory environment and the effectiveness of the system is demonstrated. A cross-shaped metal object and a drone are chosen as targets and the SAR images of targets are obtained. For simplicity, by employing a single transceiver pair, sparse samples are taken in a large scanning aperture. It has been shown that the proposed scanning system has great potential in SAR imaging of large objects such as unmanned aerial vehicles (UAV).

Keywords

mmWave, frequency modulated continuous wave radar, synthetic aperture radar, sar imaging, drone, unmanned aerial vehicle

Ethical Statement

In the studies carried out within the scope of this article, the rules of research and publication ethics were followed.

Thanks

The authors would like to thank the students of Gazi University Furkan Çetinkaya, Erencan Tezel, Oğuz Yalçın, and Berkan Öksüz for their contribution to the construction of the SAR scanner.

Otomotiv Radarı ile 2 Boyutlu Milimetre Dalga SAR Görüntüleme

Abstract

Son yıllarda, milimetre dalga (mmWave) frekans modülasyonlu sürekli dalga (FMCW) radarları, mmWave teknolojisinin gelişmesiyle paralel olarak radar görüntüleme uygulamalarında popülerlik kazanmıştır. Ancak hedef açıklığının büyük olduğu durumlarda yüksek maliyet ve entegrasyon karmaşıklığı hala sorun olmaya devam etmektedir. Bu çalışma, düşük maliyetli, düşük karmaşıklığa sahip ve uygulaması kolay iki boyutlu (2D) mmWave sentetik açıklıklı radar (SAR) sistemini tanıtmaktadır. 77-81 GHz frekans aralığında çalışan ticari kullanıma hazır (COTS) mmWave FMCW radar sensörü kullanılmaktadır. Hem dikey hem de yatay yönde hareket edebilen büyük bir mekanik tarama sistemi oluşturulmuş ve radar sensörüne entegre edilmiştir. Grafiksel bir kullanıcı arayüzü (GUI) geliştirerek tarayıcının otomatik hareketi sağlanır. Laboratuvar ortamında deneysel ölçümler alınarak sistemin etkinliği ortaya konulur. Hedef olarak artı şeklinde bir metal nesne ve bir drone seçilerek hedeflerin SAR görüntüleri elde edilmektedir. Basitlik açısından, tek bir alıcı-verici çifti kullanılarak, geniş bir tarama açıklığında seyrek örnekler alınır. Önerilen tarama sisteminin insansız hava araçları (İHA) gibi büyük nesnelerin SAR görüntülemesinde büyük potansiyele sahip olduğu gösterilmiştir.

Keywords

milimetre dalga, frekans modüleli sürekli dalga radarı, sentetik açıklıklı radar, SAR görüntüleme, drone, insansız hava aracı

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