安全的ISAC MIMO系统:利用贝叶斯克拉梅尔-拉奥边界优化的干扰
Nanchi Su1,2,3, Fan Liu2, Christos Masouros3
1Guangdong Provincial Key Laboratory of Aerospace Communication and Networking Technology, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055 China.
本研究介绍了一种安全的综合传感和通信 (ISAC) 设计,以提高物理层的安全性. 这种新的信号策略优化了传感性能,同时保护通信链接免受窃听者的侵害.
科学领域:
- 电气工程 电气工程
- 信息理论 信息理论
- 信号处理 信号处理
背景情况:
- 综合传感和通信 (ISAC) 系统提供双重功能,但面临安全挑战.
- 潜在的窃听者可以利用通信信号进行监视.
- 在确保通信安全的同时优化传感性能对ISAC至关重要.
研究的目的:
- 为安全的ISAC系统开发一个信号设计.
- 优化目标传感性能,同时保持通信服务质量.
- 加强ISAC系统对窃听的物理层安全.
主要方法:
- 使用双功能MIMO基站进行同时通信和传感.
- 尽量减少贝叶斯克拉梅尔-拉奥边界,以优化传感性能.
- 利用构造性干扰为窃听者创造破坏性的信号区域.
- 采用一个连续的凸近似方法来解决非凸优化问题.
主要成果:
- 拟议的信号设计有效地提高了ISAC系统的物理层安全性.
- 该方法通过将贝叶斯式克拉梅尔-拉奥边界最小化,成功优化传感性能.
- 数字结果显示,与传统的区块级预编码技术相比,其性能优越.
- 建设性干扰被战略性地用来降低窃听者解码概率.
结论:
- 开发的安全ISAC信号设计有效地同时实现传感优化和通信安全.
- 提出的连续凸近似方法为复杂的优化问题提供了有效的解决方案.
- 这项工作显著提高了ISAC系统的物理层安全能力.
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