Millimeter-Wave Radar Scheme with Passive Reflector for Uncontrolled Blind Urban Intersection

Dmitrii Solomitckii, Carlos Baquero Barneto, Matias Turunen, Markus Allen, George Zhabko, Sergey Zavjalov, Sergey Volvenko, Mikko Valkama

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Modern millimeter-wave automotive radars are employed to keep a safe distance between vehicles and reduce the collision risk when driving. Meanwhile, an on-board radar module is supposed to operate in the line-of-sight condition, which limits its sensing capabilities in intersections with obstructed visibility. Therefore, this paper investigates the scheme with passive reflector, enabling the automotive radar to detect an approaching vehicle in the non-line-of-sight (blind) urban intersection. First, extensive radar measurements of the backscattering power are carried out with the in-house assembled millimeter-wave radar equipment. Next, the measured data is employed to calibrate an accurate analytical model, deduced and described in this paper. Finally, the analytical models are deployed to define the optimal parameters of the radar scheme in the particular geometry of the selected intersection scenario. Specifically, it is found that the optimal angular orientation of the reflector is 43.5, while the 20 m curvature radius shows better performance compared to a flat reflector. Specifically, the curved convex shape increases scattering power by 20 dB in the shadow region and, thus, improves the detection probability of the vehicle, approaching the blind intersection.

Original languageEnglish
Pages (from-to)7335-7346
Number of pages12
JournalIEEE Transactions on Vehicular Technology
Issue number8
Publication statusPublished - 2021
Publication typeA1 Journal article-refereed


  • Automotive radars
  • Buildings
  • collision risk
  • Kirchhoff approximation
  • Laser radar
  • millimeter-wave radar
  • Passive radar
  • passive reflector
  • Radar
  • Radar detection
  • radar measurement
  • Radar measurements
  • Roads
  • vehicular systems

Publication forum classification

  • Publication forum level 3

ASJC Scopus subject areas

  • Automotive Engineering
  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Applied Mathematics


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