Motion Compensation for Multirotors Minisar System

Abstract

This article proposes a MiniSAR imaging algorithm applied to small maneuvering platforms such as multi-rotor UAVs. Due to its load and size limitations, it can only carry low-precision IMU and GPS. These devices are not enough to accurately obtain the motion error of the platform, and thus cannot guarantee the successful imaging of each flight. In this article, an imaging algorithm segment aperture imaging (SAI) algorithm based on time-domain segmentation is designed according to the motion characteristics of a small multi-rotor platform, and the deviation is compensated according to the echo estimation, and then segment stitching is performed to obtain better imaging results. The proposed algorithm is experimentally demonstrated with the Multirotors FUSAR-Ku MiniSAR system.