A Parallel Acceleration Strategy for Large Aperture Radar Imaging and its Hardware Implementation

A parallel acceleration strategy and hardware implementation scheme for SAR imaging is proposed to accelerate imaging in high bandwidth, large aperture, and high-density scenarios. Based on traditional SAR imaging, this strategy divides the target image into multiple local images, selecting appropriate radar data within a suitable aperture range based on the locations of each local component. Multiple SAR imaging units operate in parallel, and the local images are stitched together in their original locations to achieve accelerated imaging after cropping. This paper designs the hardware for the SAR imaging units, with its core FFT operations designed as a low-cost reusable structure. By reusing and expanding this hardware unit, the acceleration system can be built with relatively low hardware resources and minimal loss in imaging quality, demonstrating significant application potential for THz radar imaging and high-resolution large-aperture security inspections.