Residual Motion Compensation in Automotive MIMO SAR Imaging

This paper deals with the analysis, estimation, and compensation of trajectory errors in automotive-based Synthetic Aperture Radar (SAR) systems. First of all, we define the geometry of the acquisition and the model of the received signal. We then proceed by analytically evaluating the effect of an error in the vehicle’s trajectory. Based on the derived model, we introduce a motion compensation (MoCo) procedure capable of estimating and compensating constant velocity motion errors leading to a well-focused and well-localized SAR image. The procedure is validated using real data gathered by a 77 GHz automotive SAR with MIMO capabilities.

[1]  Zhenfang Li,et al.  Motion compensation for high-resolution automobile-SAR , 2014, 2014 IEEE China Summit & International Conference on Signal and Information Processing (ChinaSIP).

[2]  Umberto Spagnolini,et al.  Navigation-Aided Automotive SAR for High-Resolution Imaging of Driving Environments , 2021, IEEE Access.

[3]  Hasan Iqbal,et al.  Imaging radar for automated driving functions , 2021, International Journal of Microwave and Wireless Technologies.

[4]  G. Franceschetti,et al.  Motion compensation errors: effects on the accuracy of airborne SAR images , 2005, IEEE Transactions on Aerospace and Electronic Systems.

[5]  Yulin Huang,et al.  An Auxiliary Parking Method Based on Automotive Millimeter wave SAR , 2019, IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium.

[6]  T. Zwick,et al.  Millimeter-Wave Technology for Automotive Radar Sensors in the 77 GHz Frequency Band , 2012, IEEE Transactions on Microwave Theory and Techniques.

[7]  Stephan Stanko,et al.  Millimeter resolution SAR imaging of infrastructure in the lower THz region using MIRANDA-300 , 2016, 2016 46th European Microwave Conference (EuMC).

[8]  Reinhard Feger,et al.  Experimental verification of a 77-GHz synthetic aperture radar system for automotive applications , 2017, 2017 IEEE MTT-S International Conference on Microwaves for Intelligent Mobility (ICMIM).