Collaborative Research: SWIFT-SAT: DASS: Dynamically Adjustable Spectrum Sharing between Ground Communication Networks and Earth Exploration Satellite Systems Above 100 GHz

下一代无线网络和卫星被动传感系统将受益于更广泛的频谱接入，特别是100 GHz以上的频谱接入，以分别提供极高的数据速率和更精确的天气和气候跟踪。然而，频谱共享需要保证被动传感应用不会受到干扰，因为人工信号可能会影响地球遥感的可靠性。对100 GHz以上通信和遥感共享解决方案的研究是及时的，因为其结果可能会影响下一代无线网络的标准化和政策，并将共享嵌入到协议堆栈中，而不是事后才在覆盖中。在该项目中，研究人员与标准组织和监管机构合作，宣传这些发现，并将向通信和遥感社区提供开放的数据集和模型，以建立对共享解决方案的信任和信心，在两个社区之间建立一座桥梁。最后，为各机构的课程编写了多学科教材，并为联合面向遥感和通信专业学生的暑期学校编写了教材，以培训下一代频谱专业人员。100 GHz以上的频谱支持不同的应用。传统上，遥感研究的重点是100 GHz以上多个窄子波段的特定分子吸收线。最近，射频(RF)电路、天线和数字信号处理(DSP)的发展，以及传统用于无线网络的频率的频谱紧缩，促使通信考虑在亚太赫兹频谱中为第六代(6G)回程和接入网络提供潜在的大带宽。然而，当前的频谱分配阻止通信网络在100-200 GHz范围内使用超过12.5 GHz的连续频谱。这在很大程度上是因为需要保护被动遥感服务，这些服务测量自然现象，因此不能容忍射频干扰(RFI)。这种严格的频谱分配方案阻止了这两项服务从更大的带宽、更快的通信链路以及更高的精度和遥感机会中受益。虽然其他频谱区域也是如此，但100 GHz以上的频谱特性使得共享和共存解决方案更加灵活。该项目通过(I)表征下一代6G设备对传感卫星的RFI，包括Tempest-H8传感器和TeraNova试验床的实验测量；(Ii)为6G网络开发大规模RFI模型；以及(Iii)当前和下一代无线系统的频谱共享策略来开发此类技术。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

Next-generation wireless networks and satellite passive sensing systems will benefit from broader spectrum access, specifically above 100 GHz, to provide connectivity with extremely high data rates and more precise weather and climate tracking, respectively. Spectrum sharing, however, needs to guarantee that passive sensing applications are not harmed by interference, since artificial signals may affect the reliability of Earth remote sensing. Research on sharing solutions for communications and remote sensing above 100 GHz is timely, since its outcomes can influence standardization and policy for next-generation wireless networks and embed sharing in the protocol stack rather than in an overlay as an afterthought. In this project, researchers engage with standards organizations and regulatory bodies to promote the findings and will provide the communications and remote sensing communities with open datasets and models to build trust and confidence in sharing solutions, creating a bridge between the two communities. Finally, multi-disciplinary educational material is developed for coursework across institutions, and for summer schools jointly addressed to remote sensing and communications students, to train the next generation of spectrum professionals. The spectrum above 100 GHz enables different applications. Traditionally, remote sensing has focused on specific molecular absorption lines in multiple narrow sub-bands above 100 GHz. More recently, developments in radio frequency (RF) circuitry, antennas, and digital signal processing (DSP) – together with the spectrum crunch in the frequencies traditionally used for wireless networks – have pushed communications to consider the large bandwidths potentially available in the sub-terahertz spectrum for sixth generation (6G) backhaul and access networks. Current spectrum allocations, however, prevent communications networks from using more than 12.5 GHz of contiguous spectrum in the 100-200 GHz range. This is largely due to the need to protect passive remote sensing services, which measure natural phenomena and thus cannot tolerate RF interference (RFI). This rigid spectrum allocation scheme prevents both services from benefiting from larger bandwidths, for faster communication links as well as increased precision and opportunities for remote sensing. While this is true for other spectral regions, the characteristics of the spectrum above 100 GHz make the case for more flexible sharing and coexistence solutions. This project develops such techniques by (i) characterizing the RFI of next-generation 6G devices to sensing satellites, including experimental measurements with the TEMPEST-H8 sensor and the TeraNova testbed; (ii) developing large-scale RFI models for 6G networks; and (iii) spectrum sharing strategies for current and next-generation wireless systems.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.