Interference protection of radio astronomy services using cognitive radio spectrum sharing models

2015 European Conference on Networks and Communications (EuCNC) Pub Date : 2015-08-13 DOI:10.1109/EUCNC.2015.7194046

Periola Ayodele, Falowo Olabisi

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引用次数: 5

Abstract

Radio astronomical services (RASs) use the radio spectrum to observe cosmic sources (Srcs). They are protected from interference by establishing national radio quiet zones (NRQZs). However, NRQZs do not prevent interference from satellite networks with intersatellite links. This causes impairment in directly observing cosmic sources. Therefore, current knowledge of the universe is inaccurate being obtained from filtered signals. However, accurate knowledge can be obtained in RASs via a pristine observation of Srcs using cognitive radio (CR) technology. This paper, examines the suitability of CR spectrum sharing models for interference protection of RASs. It proposes an interference protection framework and investigates the satellite's transmit opportunities using visibility duration data of RASs. It then examines the end to end delay of the satellite network when the framework is used. Simulation is conducted for a constellation of low earth orbit satellites and the obtained results show that transmit opportunities exist for intersatellite links when the interweave spectrum sharing model is used without causing any interference to RASs or significantly increasing the end to end delay.

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基于认知无线电频谱共享模型的射电天文业务干扰防护

射电天文服务(RASs)使用无线电频谱观测宇宙源(src)。通过建立国家无线电安静区(NRQZs)来保护它们免受干扰。然而，nrqz不能防止来自卫星间链路的卫星网络的干扰。这对直接观测宇宙源造成了损害。因此，目前对宇宙的认识是不准确的，因为它是从经过过滤的信号中获得的。然而，通过使用认知无线电(CR)技术对Srcs进行原始观察，可以在RASs中获得准确的知识。研究了CR频谱共享模型在红外光谱系统干扰保护中的适用性。提出了一种干扰保护框架，并利用雷达的可见持续时间数据研究了卫星的传输机会。然后在使用该框架时检查卫星网络的端到端延迟。对一个低地球轨道卫星星座进行了仿真，结果表明，采用交织频谱共享模式时，星间链路存在传输机会，且不会对RASs产生干扰，也不会显著增加端到端时延。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2015 European Conference on Networks and Communications (EuCNC)

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