A Fast and Super-Resolution Method of Vortex-Based Imaging

作者：Ting Jiang, Jun Hu, Siqi Luo, Ying Wang, Wen Wu · 发表于：IEEE Antennas and Wireless Propagation Letters · 年份：2023 · DOI：10.1109/lawp.2023.3281617 · 被引用次数：16 · 研究领域：Orbital Angular Momentum in Optics、Digital Holography and Microscopy、Adaptive optics and wavefront sensing

With characteristics of particular wavefronts and orthogonal modes, the sparse imaging method based on the vortex waves could obtain high-resolution reconstruction. However, building a large-scale observation matrix is time-consuming and heavily burdens the whole imaging procedure. Inspired by the spherical harmonic expansion of plane waves, this letter provides a fast super-resolution imaging method based on the vortex waves. Featuring spherical harmonic functions and a transformation, an orthogonal matching pursuit algorithm for high-resolution imaging exploits a low-rank matrix decomposition of the observation matrix. Simulation results show that the proposed method exhibits significant efficiency advantages while retaining high resolution, achieving an efficiency of up to 51.4% when applied to a large-scale observation matrix.