3D High-Precision Imaging Based on MIMO-SAR

The imaging technique based on multiple-input multiple-output synthetic aperture radar (MIMO SAR) is considered capable of providing three-dimensional radar images without motion artifacts and geometric distortions. However, in practical applications, real MIMO-SAR data faces challenges such as channel errors and motion errors, as well as computational complexity, which limits the ability to efficiently focus on real data. As a result, there is a relative scarcity of literature demonstrating three-dimensional imaging results of real MIMO-SAR data. This paper aims to introduce a three-dimensional wavenumber support domain approximate imaging algorithm based on MIMO-SAR and establishes a corresponding imaging system. The effectiveness of the proposed algorithm is validated through simulations and experiments. The experimental results demonstrate that the system achieves fast three-dimensional high-resolution imaging at a relatively low cost.