Collaborative Opportunistic Navigation
Collaborative Opportunistic Navigation
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协作机会导航
DOI：
10.15781/t28k75d0h
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
T. Humphreys
中科院分区：
文献类型：
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作者：
Zak M. Kassas;Kenneth M. Pesyna;T. Humphreys
尽管全球导航卫星系统取得了非凡的进展，但其天基信号微弱的固有局限性使得此类信号很容易被有意或无意地阻断。这使得GNSS不足以随时随地进行可靠的导航，特别是在GNSS挑战的环境中，例如室内，城市深处的峡谷和经历故意干扰的GNSS拒绝环境[1]。已经提出了几种方法来解决基于全球导航卫星系统的导航的这一固有局限性，最显著的是用航位推算系统增强全球导航卫星系统接收器。这种方法通常将固定数量的良好建模的异构传感器（特别是GNSS接收器、惯性导航系统和数字地图数据库）的输出与专门的信号处理算法融合。受GNSS挑战环境中环境射频信号丰富的启发，提出了一种克服基于GNSS的导航局限性的新范式。这种模式，称为机会导航（OpNav），旨在从环境射频信号的机会（SOP）中提取定位和定时信息。OpNav无线电接收器不断搜索合适的信号，从中获取导航和定时
Despite the extraordinary advances in global navigation satellite systems (GNSS), the inherent limitation of the weakness of their space-based signals makes such signals easy to block intentionally or accidentally. This makes GNSS insufficient for reliable anytime, anywhere navigation, particularly in GNSS-challenged environments, such as indoors, deep urban canyons, and GNSS-denied environments experiencing intentional jamming [1]. Several approaches have been proposed to address this inherent limitation of GNSS-based navigation, most notably augmenting GNSS receivers with deadreckoning systems. This approach typically fuses the outputs of a fixed number of well-modeled heterogeneous sensors, particularly, GNSS receivers, inertial navigation systems, and digital map databases, with specialized signal processing algorithms. Motivated by the plenitude of ambient radio frequency signals in GNSS-challenged environments, a new paradigm to overcome the limitations of GNSSbased navigation is proposed. This paradigm, termed opportunistic navigation (OpNav), aims to extract positioning and timing information from ambient radio frequency signals of opportunity (SOPs). OpNav radio receivers continuously search for opportune signals from which to draw navigation and timing