Estimating speed using a side-looking single-radar vehicle detector

Shyr Long Jeng, Wei-Hua Chieng, Hsiang Pin Lu

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


This paper presents a side-looking single-beam microwave vehicle detector (VD) system for estimation of per-vehicle speed and length. The proposed VD system is equipped with a 2-D range Doppler frequency-modulated continuous-wave (FMCW) radar using a squint angle. The associated Fourier processor uses an inverse synthetic aperture radar (ISAR) algorithm to extract range and speed data for each vehicle using a single-beam FMCW radar. The simulation and experimental results show accurate estimations of vehicle speed and length. The measurement errors of speed and length were approximately ±4 km/h and ±1 m, respectively. The proposed method has excellent detection capability for small moving targets, such as bikes and pedestrians, at speeds down to 5 km/h. A commercial 10.6-GHz radar with signal processing modifications was used in the experiments.

Original languageEnglish
Article number6636147
Pages (from-to)607-614
Number of pages8
JournalIEEE Transactions on Intelligent Transportation Systems
Issue number2
StatePublished - 1 Jan 2014


  • Frequency-modulated continuous wave (FMCW)
  • intelligent transportation system (ITS)
  • synthetic aperture radar (SAR)
  • vehicle detector (VD)

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