CIF: Small: Jamming in Wireless Networks: Offensive Strategies and Cooperation

在无线通信系统中，干扰是实现高数据速率的主要障碍。故意干扰或“干扰”主要是在军事通信网络中研究的。大多数先前的工作都使用非描述性模型来描述干扰器，除了它们传播噪声的能力之外，没有给它们赋予任何策略或特殊能力。本研究项目侧重于干扰策略本身的设计，而不是其缓解（尽管后一个问题本身也得到了解决）。考虑的问题包括：干扰者可以利用哪些信息？干扰机如何处理信息不精确的情况？分布式干扰者如何协调他们的干扰以使其效果最大化？如何设计干扰来掩盖必须确保不被窃听的通信？该项目侧重于利用物理层多天线的干扰技术。具体的研究重点包括：——无线网络中的合作干扰：正在开发合作策略，将资源最佳地分配给期望的链路和友好的干扰器。恶意反馈：“干扰”不是噪音，而是恶意的物理层反馈。对这些进行研究，以确定潜在损害的程度和可能的补救措施。-对不准确信道估计的鲁棒性：最大限度地提高干扰的影响关键取决于可用信道信息的质量。这项研究正在调查这些信息的不准确性以及对这些信息的可靠技术的影响。实验研究：在实验室中使用MIMO无线电，研究人员正在实际网络中实施协作干扰方法，并研究理论和实际性能之间的差距。

Interference is a key impediment to achieving high data rates in wireless communications systems. Intentional interference or "jamming" has primarily been studied in military communication networks. Most prior work has used non-descriptive models for the jammers, without ascribing any strategies or special capabilities to them beyond their ability to broadcast noise. This research project focuses on the design of the jamming strategies themselves, rather than on their mitigation (although the latter issue is inherently addressed as well). Questions considered include: What information can jammers exploit? How does the jammer deal with situations where this information is imprecise? How can distributed jammers coordinate their interference to maximize its effect? How should the jamming be designed to mask communications that must be kept secure from eavesdroppers?The project is focuses on jamming techniques that exploit multiple antennas at the physical layer. Specific research thrusts include:-- Cooperative jamming in wireless networks: Cooperative policies are being developed that optimally allocate resources to the desired link and friendly jammers.-- Malicious feedback: Scenarios where the "jamming" is not noise but rather malicious physical layer feedback. These are studied to determine the extent of potential damage and possible remedies.-- Robustness to inaccurate channel estimates: Maximizing the impact of jamming depends critically on the quality of the available channel information. This research is investigating the effect of inaccuries in this information and on techniques that are robust to such.-- Experimental studies: Using MIMO radios in their lab, the researchers are implementing cooperative jamming approaches in a real network and studying the gap between theoretical and actual performance.