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首页> 外文期刊>International Journal of Satellite Communications and Networking >The role of the Italian Space Agency in investigating high frequencies for satellite communications: The Alphasat experiment
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The role of the Italian Space Agency in investigating high frequencies for satellite communications: The Alphasat experiment

机译：意大利航天局在调查​​卫星通信高频方面的作用：Alphasat实验

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摘要

Since the 1970s, satellite communications have been continuously evolving and improving to provide services characterized by increasing complexity and quality. This evolution has been supported by the constant increase in the operating frequency for achieving the necessary high data rates. This contribution focuses on the long-term key role of the Italian Space Agency in supporting research activities on (and the developments of) high-frequency satellite communication systems. The Alphasat experiment is the most recent effort of the Italian Space Agency, in collaboration with the European Space Agency, to thoroughly investigate the severe detrimental atmospheric effects impairing radio waves at high frequency (specifically, Ka and Q bands) and the associated fade mitigation techniques (eg, uplink power control, site diversity, and adaptive coding and modulation) required to achieve the typical target quality and availability of modern satellite communication systems.
机译：自1970年代以来，卫星通信一直在不断发展和完善，以提供以复杂性和质量不断提高为特征的服务。为了实现必要的高数据速率，工作频率的不断提高为这种发展提供了支持。这项贡献着重于意大利航天局在支持高频卫星通信系统（及其发展）的研究活动中的长期关键作用。 Alphasat实验是意大利航天局与欧洲航天局合作进行的最新工作，旨在彻底研究严重损害大气的有害影响，这些损害会损害高频（尤其是Ka和Q波段）的无线电波以及相关的衰减缓解技术（例如，上行链路功率控制，站点分集以及自适应编码和调制），以实现现代卫星通信系统的典型目标质量和可用性。

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