3.5 GHz environmental sensing capability sensitivity requirements and deployment
3.5 GHz environmental sensing capability sensitivity requirements and deployment
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3.5GHz环境传感能力灵敏度要求和部署
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
Timothy A. Hall
中科院分区：
文献类型：
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作者：
Thao T. Nguyen;A. Sahoo;M. Souryal;Timothy A. Hall
美国沿海地区沿着的商业和政府用户之间在3.5 GHz频段的频谱共享取决于环境感知能力（ESC），即射频传感器网络和决策系统，以检测现有舰载雷达系统的存在并根据需要触发保护措施。众所周知，这些传感器的灵敏度取决于商业系统对现有雷达接收器产生的总干扰，但迄今为止，还没有对现实场景中的总干扰及其对雷达信号检测要求的影响进行全面研究。本文提出了系统的方法来确定所需的灵敏度和ESC传感器的位置，以充分保护现任舰载雷达系统免受有害干扰。使用基于地形的传播模型和基于人口的部署模型，分析发现必须触发保护的离岸距离，并将其与海岸线传感器的最低所需信号检测水平相关联。我们进一步表明，传感器的放置是一种形式的著名的集合覆盖问题，已被证明是NP完全的，并展示了实际的解决方案，实现了贪婪算法。结果表明，所需的灵敏度是4分贝至16分贝低于目前的行业标准所要求的。本文提出的方法和结果可用于ESC运营商的规划和部署的传感器和监管机构测试传感器性能。
Spectrum sharing in the 3.5 GHz band between commercial and government users along U.S. coastal areas depends on an Environmental Sensing Capability (ESC), a network of radio frequency sensors and a decision system, to detect the presence of incumbent shipborne radar systems and trigger protective measures, as needed. It is well known that the sensitivity of these sensors depends on the aggregate interference generated by commercial systems to the incumbent radar receivers, but to date no comprehensive study has been made of the aggregate interference in realistic scenarios and its impact on the requirement for detection of the radar signal. This paper presents systematic methods for determining the required sensitivity and placement of ESC sensors to adequately protect incumbent shipborne radar systems from harmful interference. Using terrain-based propagation models and a population-based deployment model, the analysis finds the offshore distances at which protection must be triggered and relates these to a minimum required signal detection level at coastline sensors. We further show that sensor placement is a form of the well-known set cover problem, which has been shown to be NP-complete, and demonstrate practical solutions achieved with a greedy algorithm. Results show required sensitivities to be 4 dB to 16 dB lower than required by current industry standards. The methodology and results presented in this paper can be used by ESC operators for planning and deployment of sensors and by regulators for testing sensor performance.