SARComm is a novel wireless communication system that enables passive satellite backscatter connectivity using existing spaceborne synthetic aperture radar (SAR) signals. We demonstrate that SAR signals from the European Space Agency's Sentinel-1 satellite, used to image Earth's terrain, can be leveraged to enable low-power ground-to-satellite communication. This paper presents the first cooperative, on-the-ground target that modulates SAR backscatter to send information bits and analyzes how to extract them from publicly available Sentinel-1 datasets. To demonstrate the system, we evaluate the effectiveness of modulating the radar cross section of corner reflectors both mechanically and electronically to encode data bits, develop a deployment algorithm to optimize corner reflector placement, and present a SAR processing pipeline to enable communication.

翻译：SARComm是一种新型无线通信系统，它利用现有的星载合成孔径雷达信号实现无源卫星反向散射连接。我们证明，用于地球地形成像的欧洲航天局Sentinel-1卫星的SAR信号，可被用于实现低功耗的地对星通信。本文提出了首个合作式地面目标，通过调制SAR反向散射来发送信息比特，并分析了如何从公开可用的Sentinel-1数据集中提取这些信息。为验证该系统，我们评估了通过机械和电子方式调制角反射器雷达截面积以编码数据比特的有效性，开发了优化角反射器布设的部署算法，并提出了一种实现通信的SAR处理流程。