Real Data Imaging Approach Design for Automotive SAR Experiments

In this paper, the potential of applying synthetic aperture radar (SAR) in automotive filed has been demonstrated by using a vehicle-mounted 77GHz Frequency Modulation Continuous Wave (FMCW) radar. An improved Range Doppler Algorithm (RDA), which is ideal for focusing serious range curvatures of targets at short ranges, has been presented in this work to produce high-resolution SAR images of automotive scenarios. The first part of this paper gives a detailed model of vehicle-mounted SAR system and the problems caused by the unique characteristics of model has been analyzed. In the latter part, the processing flow of the proposed novel RD algorithm based on range partition is presented, which, compared to the traditional RD algorithm, performs well in automotive SAR imaging. The imaging result of real scene is presented to validate the proposed method.