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Design and analysis of ultra-wideband ad hoc covert wireless radar-comm networks.

机译：超宽带自组织隐蔽无线雷达通信网络的设计和分析。

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摘要

Recently, the wireless networks research community has taken considerable interest in concurrently utilizing the ultra-wideband (UWB) spectrum with narrow-band systems to implement coexisting and cognitive spectrum solutions. In parallel, multi-channel multi-radio wireless systems are being developed to achieve improved network capacity by exploiting non-overlapping channel transmissions. Our motivation is to exploit the synergy between the above two approaches, in developing a multi-functional wireless system with significant support to applications of practical relevance. The goal, therefore, is to provide a exible framework for situational awareness in infrastructure-less covert surveillance circumstances, such as hostage rescue, first-emergency response, natural disaster recovery, or military surveillance. The primary requirements for such applications include the capability for detection of long range targets, distributed computing, and securely communicating the information across a multi-sensor network. These situations are further characterized by the absence of any central infrastructure, limited spectrum availability, varying topological environments, and growing wireless security concerns.;It is well known that UWB noise radar achieves covert high-resolution imaging of targets and terrain. The wide bandwidth yields fine range resolution, while the noise waveform provides immunity from detection, interference, and interception. Having multiple noise radars networked with each other can provide significant benefits in target detection and recognition. An ad hoc network harnessing the combined advantages of UWB radar sensing and wireless communications is a viable solution to the above requirement. This dissertation, therefore, proposes a unique scheme to modify the UWB noise radar to supplement it with orthogonal frequency division multiplexing (OFDM) based secure multi-user network communication capabilities, thus architecting the multi-functional UWB noise-OFDM netted radar. The salient features of this multi-functional radar system include surveillance with embedded OFDM-based communications, coexistence, multi-user capability, and physical layer security. Furthermore, with this availability of OFDM's multiple frequencies and a number of radars to share it between, this dissertation solves the problem of multi-user multi-carrier resource allocation by proposing a simple yet fully-distributed and cross-layered channel-diversity-aided algorithm. It constructs a contention-free medium access solution which scales logarithmically with the number of radar nodes, and dynamically adapts to network topology changes and wireless channel variations. Building on this contention-free local connectivity, this dissertation also qualitatively proposes a multi-carrier enhancement to the ad hoc on-demand distance vector (AODV) routing protocol for mobile ad hoc networks. Incorporating this enhancement will not only allow the ad hoc radar network to be resilient to mobility, but also provide routing protocol security, hence bridging one of the drawbacks of AODV.
机译：最近，无线网络研究界对将超宽带（UWB）频谱与窄带系统同时使用以实现共存和认知频谱解决方案引起了极大的兴趣。并行地，正在开发多信道多无线电无线系统以通过利用非重叠信道传输来实现改善的网络容量。我们的动机是在开发多功能无线系统时充分利用以上两种方法之间的协同作用，从而为实际相关应用提供重要支持。因此，目标是为缺乏基础设施的秘密监视情况（例如人质抢救，紧急事件响应，自然灾难恢复或军事监视）提供一种态势感知的可行框架。这种应用程序的主要要求包括检测远程目标，分布式计算以及跨多传感器网络安全地传递信息的能力。这些情况的特征还在于缺少任何中央基础设施，有限的频谱可用性，变化的拓扑环境以及日益增长的无线安全问题。众所周知，UWB噪声雷达实现了对目标和地形的秘密高分辨率成像。宽带宽可产生良好的范围分辨率，而噪声波形可抵抗检测，干扰和拦截。将多个噪声雷达相互连接可以在目标检测和识别方面提供显着的优势。利用UWB雷达感测和无线通信的综合优势的自组织网络是满足上述要求的可行解决方案。因此，本论文提出了一种独特的方案来修改UWB噪声雷达，以基于正交频分复用（OFDM）的安全多用户网络通信功能对其进行补充，从而构造了多功能UWB噪声OFDM网状雷达。该多功能雷达系统的显着特征包括基于嵌入式OFDM的通信监视，共存，多用户能力和物理层安全性。此外，借助OFDM多个频率的可用性以及在其之间共享的多个雷达，本论文通过提出一种简单而全面的跨层信道多样性辅助解决了多用户多载波资源分配的问题。算法。它构建了一个无争用的媒体访问解决方案，该解决方案可以根据雷达节点的数量进行对数扩展，并动态适应网络拓扑变化和无线信道变化。在这种无竞争的本地连接的基础上，本论文还定性地提出了一种针对移动自组织网络的自组织按需距离矢量路由协议的多载波增强。合并此增强功能不仅将使ad hoc雷达网络具有增强的移动性，而且还可以提供路由协议安全性，从而弥补了AODV的缺点之一。

著录项

  • 作者

    Surender, Shrawan Chittoor.;

  • 作者单位

    The Pennsylvania State University.;

  • 授予单位 The Pennsylvania State University.;
  • 学科 Engineering Computer.;Computer Science.
  • 学位 Ph.D.
  • 年度 2011
  • 页码 147 p.
  • 总页数 147
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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