面向noma的低轨道卫星-地面下行通信频谱感知

IF 4.6 3区计算机科学 Q1 COMPUTER SCIENCE, INFORMATION SYSTEMS

IEEE Wireless Communications Letters Pub Date : 2024-12-25 DOI:10.1109/LWC.2024.3521925

Jie Zhu;Tianheng Xu;Chao Wang;Yun Rui;Wei Xu;Yongming Huang;Mohsen Guizani

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NOMA-Oriented Spectrum Sensing for LEO Satellite-Terrestrial Downlink Communications

The collaboration of terrestrial infrastructure and satellites has become one of the main features of 6th-Generation (6G) mobile communication networks. While promoting the integration of these architectures with different dimensions, the scarcity of spectrum resources becomes a key factor restricting further development. Confronted with such a significant challenge, it is imperative to develop effective strategies aimed at comprehensively enhancing the efficiency of spectrum utilization. This letter introduces a Non-Orthogonal Multiple Access (NOMA)-oriented spectrum sensing technique, which serves downlink scenarios of multi-satellite in terrestrial-satellite communications. We propose the corresponding operational principles and deduce the sensing threshold in different mobile coverage scenarios of Low Earth Orbit (LEO) satellites. Simulation results manifest that compared with the Orthogonal Multiple Access (OMA) system, the proposed technique achieves a maximum 18.6% throughput gain under the given conditions.

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来源期刊

IEEE Wireless Communications Letters Engineering-Electrical and Electronic Engineering

CiteScore

12.30

自引率

6.30%

发文量

481

期刊介绍： IEEE Wireless Communications Letters publishes short papers in a rapid publication cycle on advances in the state-of-the-art of wireless communications. Both theoretical contributions (including new techniques, concepts, and analyses) and practical contributions (including system experiments and prototypes, and new applications) are encouraged. This journal focuses on the physical layer and the link layer of wireless communication systems.