360-degree video synthetic aperture radar (VideoSAR) presents a powerful capability for the information perception of dynamic scenes. In comparison to time-consuming airborne SAR, miniature SAR (MiniSAR) mounted on an unmanned aerial vehicle platform is a cost-effective configuration that provides a higher operation flexibility for video acquisition. Nevertheless, MiniSAR system development and signal processing limited by multiple factors are still challenging issues, including restricted weight, volume, power consumption, complicated trajectory imaging, and high-efficient video processing. In this article, we develop a multirotors VideoSAR system at X-band in Nanjing University of Aeronautics and Astronautics, concerning hardware architecture, field experiment, and video signal processing. It has the capability of ultrahigh resolution imaging with three available channels up to 1.8-GHz transmission bandwidth. Field programmable gate array-based unified signal processing architecture can further accelerate the generation of massive VideoSAR sequences in terms of both circular spotlight and stripmap modes. Several experimental results have been presented to demonstrate the validity of our developed system.

中文翻译：

---

多旋翼视频合成孔径雷达：系统开发和信号处理

360度视频合成孔径雷达（VideoSAR）为动态场景的信息感知提供了强大的能力。与耗时的机载SAR相比，安装在无人机平台上的微型SAR（MiniSAR）是一种具有成本效益的配置，为视频采集提供了更高的操作灵活性。尽管如此，受多种因素限制的MiniSAR系统开发和信号处理仍然是具有挑战性的问题，包括受限的重量、体积、功耗、复杂的轨迹成像和高效的视频处理。在本文中，我们在南京航空航天大学开发了一个 X 波段多旋翼 VideoSAR 系统，涉及硬件架构、现场实验和视频信号处理。它具有超高分辨率成像能力，具有三个可用通道，传输带宽高达 1.8 GHz。基于现场可编程门阵列的统一信号处理架构可以在圆形聚光灯和带状图模式方面进一步加速海量 VideoSAR 序列的生成。已经提出了几个实验结果来证明我们开发的系统的有效性。