计算机科学
正交频分复用
星座
卫星
分集方案
绩效改进
吞吐量
可靠性(半导体)
无线
卫星星座
时间分集
计算机网络
天线分集
分集增益
电信
频道(广播)
功率(物理)
衰退
工程类
物理
天文
运营管理
量子力学
航空航天工程
作者
Stefano Buzzi,Giuseppe Caire,Giulio Colavolpe,Carmen D’Andrea,Tommaso Foggi,Amina Piemontese,Alessandro Ugolini
标识
DOI:10.1109/lcomm.2023.3320793
摘要
Non-terrestrial networks will play a crucial role in future wireless 6G systems to ensure ubiquitous connectivity and to complement terrestrial networks. With reference to a LEO constellation, this letter performs a comparison in terms of pragmatic capacity between the OFDM and the OTFS modulation in a scenario where multi-satellite diversity is employed to ensure a more uniform throughput and to increase the system reliability against unforeseen blockages. The considered scenario is akin to a cell-free system, wherein each user may be jointly served by multiple satellites for better and more stable performance. Numerical results reveal that multi-satellite diversity is effective in increasing the link performance and that OTFS provides a better performance and is thus more robust to the impairments caused by the heavy Doppler shifts.
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