摘要
未来的星地一体融合网络能够在任何地点、任何时间为终端提供信息服务,真正实现全球无缝覆盖。随着载荷技术发展,基于大规模多波束卫星的星地通信是星地融合网络中的关键组成部分。针对大规模海量波束的星地通信场景,分析了对波形技术的需求;针对波束灵活调度和PAPR性能指标,以CP⁃OFDM和DFT⁃S⁃OFDM作为多载波和单载波的典型代表进行了对比分析。同时,通过仿真说明采用PAPR抑制方法可以使多载波CP⁃OFDM取得不亚于单载波DFT⁃S⁃OFDM的PAPR性能。最后,针对基于大规模星座海量波束的星地一体融合网络的特点,提出可以将多载波作为后续研究新波形技术的基础或对比基线。
The future integrated terrestrial and non-terrestrial network can provide information services for terminals anywhere and anytime,achieving seamless global coverage.With the development of payload technology,satellite-to-earth communication based on large-scale multi-beam satellites becomes one key component of integrated terrestrial and non-terrestrial network.In this paper,the demand of waveform technology for satellite-to-earth communication with massive beams is analyzed.Waveforms of CP-OFDM and DFT-S-OFDM are compared and analyzed considering flexible beam scheduling and PAPR performance,which are typical representatives of multi-carrier and single carrier.Meanwhile,simulation results show that the PAPR performance of multi-carrier CP-OFDM with PAPR reduction can be as good as that of single carrier DFT-S-OFDM.As a result,according to the characteristics of future integrated terrestrial and non-terrestrial network with large-scale constellation massive beams,the multi-carrier is proposed as the basis or baseline for the future waveform research.
作者
王晓鲁
李榕
罗禾佳
徐兆斌
王俊
WANG Xiaolu;LI Rong;LUO Hejia;XU Zhaobin;WANG Jun(Huawei Technologies,Hangzhou 310000,China;Zhejiang University,Hangzhou 310000,China)
出处
《无线电通信技术》
2021年第5期562-568,共7页
Radio Communications Technology
基金
国家重点研发计划(2020YFB1807900)。
关键词
多载波
波形
多波束
卫星通信
峰均功率比
星地一体融合网络
multi-carrier
waveform
multi-beam
satellite communications
PAPR
integrated terrestrial and non-terrestrial network
