ISAR Imaging Pipeline for Pedestrian Monitoring Using MIMO FMCW mm-Wave Radars

Abstract

Radars operating in the mm-wave frequency range offer high-range resolution, making them suitable for various applications. However, limited angular resolution is available by the commercially-out-of-shelf multiple-input-multiple-output (MIMO) radars. For cases with stationary radar, Inverse synthetic aperture radar (ISAR) can be used to improve the angular resolution. This paper presents explicit formulations for ISAR imaging with MIMO frequency-modulated continuous wave (FMCW) radars. We demonstrate that integrating an appropriate tracking algorithm with an antenna array significantly improves imaging quality. The proposed ISAR imaging pipeline is validated through an experimental setup involving radar imaging of an individual at distances ranging from 6 to 11 meters.