Three-Dimensional Scattering Center Reconstruction Method for Single-Frequency Mimo Arc Array Radar

Single-frequency MIMO arc array radar is an innovative MIMO imaging mechanism capable of reconstructing the full-attitude three-dimensional (3D) scattering center. This model can offer a comprehensive description of the electromagnetic scattering characteristics of targets. However, traditional methods for reconstructing scattering centers exhibit increased computational complexity as the attitude angle and dimensionality rise, thereby limiting echo synthesis efficiency. To address this challenge, we propose a novel method for full-attitude 3D scattering center reconstruction based on the orthogonal matching pursuit (OMP) algorithm applied to singlefrequency MIMO arc array radar. By constructing a sparse dictionary matrix utilizing the 3D surface imaging results, the position and amplitude of the scattering centers are estimated iteratively according to an optimal atomic selection criterion, reconstructing the 3D scattering centers of complex targets from multiple attitude angles under the conditions of a given number of scattering centers. The proposed method can quickly reconstruct the full-attitude 3D scattering centers of complex targets. The effectiveness and efficiency of the proposed method are validated through the simulation data of electromagnetic scattering.