Non-confocal non-line-of-sight imaging using frequency-domain phase compensation with the reference function

Non-confocal non-line-of-sight imaging technology, characterized by advantages such as high imaging speed and efficient energy utilization, frequently experiences limitations, including diminished imaging quality and prolonged reconstruction time during the reconstruction process. This paper transfers the single-input multiple-output frequency-domain imaging scheme in the millimeter-wave field to the non-line-of-sight imaging domain, proposing a frequency-domain phase compensation non-line-of-sight imaging method based on reference functions. Simulation and experimental results demonstrate that, compared with existing methods, our approach achieves high-resolution target reconstruction with fewer artifacts and less shape distortion. Moreover, the implementation of a Fast Fourier Transform for image reconstruction results in reduced computational requirements for this method.