Three-dimensional BP Imaging Algorithm using MIMO System

Abstract

Multiple-input multiple-output (MIMO) radar is a radar system that simultaneously uses multiple transmitting antennas and receiving antennas to transmit and receive diversity waveforms for centralized processing. The MIMO system avoids the mechanical transmission structure in traditional RCS measurement and has high data acquisition efficiency, making it possible for three-dimensional (3D) imaging with large data volume requirements. Compared with the traditional two-dimensional (2D) radar image, the target 3D radar image can provide the spatial three-dimensional position of the scattering center of the complex target and its scattering intensity information, making the RCS measurement data more complete. The 3D imaging technology based on the MIMO system uses a portable MIMO array to quickly acquire data, and then uses the back-projection (BP) imaging algorithm to perform 3D imaging. This method obtains data quickly with simple hardware conditions, which has the characteristics of low cost and high efficiency. This paper derives a 3D BP imaging algorithm using MIMO system. And the applicability and correctness are verified by simulation experiments on PSF and multiple point targets.