卫星-地面系统中的抗定位上行链路通信

中文摘要 AI 辅助

本文研究了卫星-地面系统中的抗定位上行链路通信，其中地面发射机Alice与合法卫星接收机Bob通信，同时存在多个合作对抗卫星，试图利用到达时间差（TDOA）技术对Alice进行定位。具体而言，我们提出了一种基于合作干扰的抗定位通信方案，在该方案中，Alice利用叠加编码和功率分配，同时传输信息/干扰信号，用于与Bob通信以及混淆对抗卫星的信号检测/TDOA测量，而Bob采用合并向量技术来增强期望的信息信号并抑制干扰。我们定义了一个定位误差概率（LEP）指标，以联合描述信号检测和TDOA测量对定位性能的影响，然后为所提方案下的LEP建模开发了一个理论框架。我们进一步探索了干扰编码和功率的联合最优设计，以最大化LEP，同时满足Alice-Bob通信可靠性和Alice发射功率的约束。还提供了一种有效的样本平均近似方法来处理这个非凸优化问题。最后，通过大量数值结果验证了我们的理论模型，并展示了合作干扰如何在确保通信可靠性的同时提供抗定位保证。

英文摘要

This paper investigates the anti-localization uplink communication in a satellite-terrestrial system, where a ground transmitter Alice communicates with a legitimate satellite receiver Bob in the presence of multiple cooperative adversarial satellites attempting to localize Alice with the time difference of arrival (TDOA) technique. Specifically, we propose a cooperative jamming-based scheme for such anti-localization communication,in which Alice exploits the superposition coding with power allocation to simultaneously transmit information/jamming signals for communication with Bob and for confusing signal detection/TDOA measurement at adversarial satellites, while Bob employs the combining vector technique to enhance the desired information signal and also suppress the jamming. We define a localization error probability (LEP) metric to jointly depict both the impacts of signal detection and TDOA measurement on localization performance, and then develop a theoretical framework for the LEP modeling under the proposed scheme. We further explore the joint optimal design of jamming coding and power for LEP maximization, subject to the constraints of AliceBob communication reliability and Alice's transmit power. An effective sample average approximation method is also provided to tackle this non-convex optimization problem. Finally, extensive numerical results are illustrated to validate our theoretical models and demonstrate how the cooperative jamming helps to provide an anti-localization guarantee while ensuring communication reliability

发表机构

• Hangzhou Institute of Technology, Xidian University（西安电子科技大学杭州研究院）
• School of Computer and Information Engineering, Chuzhou University（滁州学院计算机与信息工程学院）
• School of Computer Science and Technology, Xidian University（西安电子科技大学计算机科学与技术学院）
• School of Systems Information Science, Future University Hakodate（函馆未来大学系统信息科学系）

机构由 AI 辅助整理，请以论文原文为准。