Opportunistic Temporal Spectrum Coexistence of Passive Radiometry and Active Wireless Networks
Opportunistic Temporal Spectrum Coexistence of Passive Radiometry and Active Wireless Networks
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DOI：
10.1109/wnyispw57858.2022.9983493
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发表时间：
2022-11
期刊：
影响因子：
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通讯作者：
Mohammad Koosha;Nicholas Mastronarde
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文献类型：
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作者：
Mohammad Koosha;Nicholas Mastronarde
无线频谱不足以支持有源无线技术和设备的持续增长。这引发了对频谱共存的广泛研究。在本课程中获得有限关注的一个案例是使用当前禁止的频段进行主动无线通信。其中一种选择是L波段1.400至1.427 GHz的27 MHz宽窄带部分，专门用于遥感和射电天文学的空间无源辐射测量。目前，无线电法规禁止有源无线通信和雷达在该频段工作，以避免对高噪声敏感的无源辐射测量设备产生射频干扰。美国国家航空航天局（NASA）的土壤湿度主动被动（SMAP）卫星是最新的星载遥感任务之一，通过被动扫描地球在该频段的热辐射来评估全球土壤湿度。在本文中，我们探讨了机会主义的时间使用这27 MHz宽的被动辐射测量频带的主动无线传输时，没有视线（LoS）之间的SMAP和地面无线网络。我们使用MATLAB模拟来确定SMAP的轨道特性的基础上，在不同的地球纬度的地面无线小区的时间，SMAP有LoS（和非LoS）的分数。我们还研究了在存在具有LoS的5G细胞的陆地集群的情况下，SMAP上诱导的RFI的严重程度。
There is insufficient wireless frequency spectrum to support the continued growth of active wireless technologies and devices. This has provoked extensive research on spectrum coexistence. One case that has gained limited attention in this course is using currently banned frequency bands for active wireless communications. One such option is the 27 MHz-wide narrowband portion of the L-band from 1.400 to 1.427 GHz, which is exclusively devoted to space-borne passive radiometry for remote sensing and radio astronomy. Radio regulations currently prohibit active wireless communications and radars from operating in this band to avoid radio frequency interference (RFI) on highly noise-sensitive passive radiometry equipment. The National Aeronautics and Space Administration’s (NASA’s) Soil Moisture Active Passive (SMAP) satellite is one of the latest space-borne remote sensing missions that evaluates global soil moisture by passive scanning of the thermal emissions of the earth in this frequency band. In this paper, we investigate the opportunistic temporal use of this 27 MHz-wide passive radiometry band for active wireless transmissions when there is no Line of Sight (LoS) between SMAP and a terrestrial wireless network. We use MATLAB simulations to determine the fraction of time that SMAP has LoS (and non-LoS) with a terrestrial wireless cell at different Earth latitudes based on SMAP’s orbital characteristics. We also investigate the severity of RFI induced on SMAP in the presence of a terrestrial cluster of 5G cells with LoS.