Auto-calibration of Automotive Radars in Operational Mode Using Simultaneous Localisation and Mapping

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Abstract

This paper presents an analysis of a new method of automotive radar self-calibration which uses targets of opportunity. While conventional offline calibration of a phased array antenna requires accurate knowledge of the positions of calibration targets relative to the radar, such information is not available in a dynamic scenario. To compensate for this, we have developed an estimation procedure based on an extended Kalman filter (EKF) to address the challenge of simultaneous localisation, mapping and calibration. The proposed technique makes it possible to compensate for moderate errors of amplitude and phase in the phased array response with just a few measured frames. A significant reduction in the sidelobe rejection of the array response, plus the ability to correct for angular steering errors, are demonstrated via numerical simulations and real data processing.

Original languageEnglish
Article number9353252
Pages (from-to)2062-2075
Number of pages14
JournalIEEE Transactions on Vehicular Technology
Volume70
Issue number3
DOIs
Publication statusPublished - 2021

Keywords

  • calibration
  • phased arrays
  • Radar
  • SLAM

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