A New Paradigm for Non-Geosynchronous Satellite Communications and Radio Astronomy Systems

非地球同步卫星通信和射电天文系统的新范式

基本信息

批准号：
1907614
负责人：
Hlaing Minn
金额：
$ 39.48万
依托单位：
University of Texas at Dallas
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2019
资助国家：
美国
起止时间：
2019-07-01 至 2023-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1907614&HistoricalAwards=false
关键词：
New Paradigm Non Geosynchronous Satellite

项目摘要

Spectrum is a precious natural resource for various active (transmit and receive) and passive (receive only) wireless systems, both of which provide several benefits to the society. However, phenomenal growth of active wireless systems and related spectrum allocations have caused less spectrum observation opportunities and greater chances of radio frequency interference (RFI) for passive wireless systems. One of the expansions of active wireless systems that deserves a special attention is the emergence of large-scale non-geosynchronous orbit (NGSO) satellite communication systems (SCSs). The prospects of such large-scale SCSs impose a distressing RFI situation to passive wireless systems such as radio astronomy system (RAS). Radio astronomy enables study of the universe, astro-physics and astro-chemistry as well as testing of the laws of fundamental physics, thus its growth is crucial for advancing science and knowledge discovery. The existing spectrum allocation/access paradigm is difficult to accommodate mutual growths of RAS and NGSO SCS. The purpose of this project is to develop a new paradigm for RAS and NGSO SCS where both types of systems can coexist and expand beyond what is achievable in the existing paradigm. Instead of viewing large-scale NGSO SCSs as a threat of RFI, this project views them as an opportunity to develop an integrated large-scale NGSO-SCS and NGSO-RAS system that can provide space-based RAS observation services, in addition to their main communication services. By enabling a large-scale NGSO-RAS, the proposed paradigm will open a new era for RAS with numerous enhanced capabilities and observation opportunities. This can lead to new exciting science discoveries on a larger scale. On the other hand, some spectrum originally allocated to RAS can be re-purposed for active wireless systems, thus stimulating more wireless applications and business opportunities for active wireless systems. The overall spectrum utilization efficiency will also be substantially enhanced.This project introduces a new paradigm of spectrum access for RAS and NGSO SCS by means of transforming a large-scale NGSO SCS into an integrated large-scale NGSO-SCS and NGSO-RAS. This is different from the current paradigm where RASs implemented on ground are prone to RFI caused by SCSs, and conflicting spectrum needs from both SCSs and RASs cannot be resolved. To have broader applicability, the project considers three types of integrated systems: i) a system with all dual-purpose satellites (each with SCS and RAS receivers), ii) a system with a mixture of dual-purpose satellites and single-purpose SCS-only satellites, iii) a system with a mixture of single-purpose SCS-only satellites and single-purpose RAS-only satellites. For each type of the integrated systems, further detailed technical developments are as follows: 1) The project will develop innovative approaches for spectrum access and resource allocation needed for the new paradigm. The project will also study new achievable performance in terms of RAS data rate, SCS data rate, and outage performance. Furthermore, promising deployment scenarios and recommended changes of frequency allocation rules will be investigated for the new paradigm. 2) The project will study new capabilities of the proposed large-scale NGSO-RAS under several deployment scenarios and practical constraints. In addition, novel solutions to enable RAS observations in the bands assigned to higher-orbit satellite systems will also be developed. 3) The project will develop efficient data transport strategies for both delay-sensitive SCS data and space-borne delay-insensitive RAS data under several deployment scenarios and optimization metrics. Joint design of resource allocation and data transport will also be developed for further performance improvement.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.

Spectrum是各种主动（传输和接收）和被动（仅接收）无线系统的宝贵自然资源，这两者都为社会带来了一些好处。但是，主动无线系统和相关频谱分配的惊人生长导致频谱观察机会较少，并且对于被动无线系统，射频干扰（RFI）的机会更大。值得特别关注的活动无线系统的扩展之一是大规模非地球同步轨道（NGSO）卫星通信系统（SCSS）的出现。如此大规模SCSS的前景对无线无线系统（例如射电天文学系统（RAS））施加了令人痛苦的RFI情况。射电天文学能够研究宇宙，天文学和天文学以及对基本物理定律的测试，因此其增长对于推进科学和知识发现至关重要。现有的频谱分配/访问范式很难适应RAS和NGSO SC的相互生长。该项目的目的是为RAS和NGSO SC开发一个新的范式，在该范式中，两种类型的系统都可以共存并扩展到现有范式中可实现的范围之外。该项目没有将大规模的NGSO SCSS视为RFI的威胁，而是将它们视为开发一个集成的大规模NGSO-SC和NGSO-RAS系统的机会，该系统还可以提供基于空间的RAS观察服务，此外还可以提供基于空间的RAS观察服务。通过启用大规模的NGSO-RAS，拟议的范式将为RA开放一个新时代，并具有许多增强的功能和观察机会。这可能会导致更大范围的新科学发现。另一方面，可以将一些最初分配给RAS的频谱重新使用用于主动无线系统，从而刺激更多无线应用程序和活动的无线无线系统机会。通过将大型NGSO SCS转换为集成的大型NGSO-SCS和NGSO-RAS，该项目引入了RAS和NGSO SCS的新频谱访问范围的新范围访问范围。这与当前在地面上实施的RASS易于由SCSS引起的RFI的范式不同，SCS和RASS的频谱需求矛盾。为了具有更广泛的适用性，该项目考虑了三种集成系统：i）具有所有双重用卫星的系统（每个卫星都有SCS和RAS接收器），ii）一个具有双重用卫星和单用途SCS的卫星混合物的系统对于每种类型的集成系统，进一步的详细技术发展如下：1）该项目将开发新范式所需的频谱访问和资源分配的创新方法。该项目还将根据RAS数据速率，SCS数据速率和中断性能研究新的可实现性能。此外，将针对新范式研究有希望的部署方案和建议的更改频率分配规则。 2）该项目将研究拟议的大规模NGSO-RAS的新功能，在几种部署方案和实际约束下。此外，还将开发出分配给高轨卫星系统的频段中的RAS观测的新颖解决方案。 3）该项目将在几种部署方案和优化指标下为延迟敏感的SC数据和太空延迟不敏感的RAS数据制定有效的数据传输策略。资源分配和数据运输的联合设计也将开发以进一步提高绩效。该奖项反映了NSF的法定任务，并使用基金会的知识分子优点和更广泛的影响审查标准，被认为值得通过评估来获得支持。