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题名: Doppler-robust high-spectrum-efficiency VCM-OFDM scheme for low Earth orbit satellites broadband data transmission
作者: Li, Jionghui; Xiong, Weiming; Sun, Geng; Wang, Zhugang; Huang, Yonghui; Shen, Ming
作者部门: 空间技术部
通讯作者: Li, JH (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, Beijing 100190, Peoples R China. ; Li, JH (reprint author), Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
关键词: satellite ground stations ; satellite links ; radio receivers ; radio transmitters ; OFDM modulation ; modulation coding ; Doppler shift ; filtering theory ; Doppler-robust high-spectrum-efficiency VCM-OFDM scheme ; low Earth orbit satellites broadband data transmission ; high-efficiency satellite-ground downlink data transmission system ; limited spectrum resource ; dynamic link conditions ; orbital motion ; LEO satellite ; variable coding modulated orthogonal frequency division multiplexing ; satellite on-board transmitter ; ground station receiver ; filtered-OFDM signal ; adjustable CODMOD ; spectral efficiency ; physical layer frame structure ; Doppler frequency shift compensation ; future gigabit X-band reliable satellite-ground downlink transmissions
刊名: IET COMMUNICATIONS
ISSN号: 1751-8628
出版日期: 2018
卷号: 12, 期号:1, 页码:35-43
收录类别: SCI ; EI
英文摘要: High-efficiency satellite-ground downlink data transmission system is being demanded to support increasing volume of data with limited spectrum resource. Considering the dynamic link conditions due to the orbital motion of low Earth orbit (LEO) satellite, variable coding modulated orthogonal frequency division multiplexing (VCM-OFDM) is proposed as an effective way to better exploit link resource. In this study, regarding the relative motion between the satellite on-board transmitter and the ground station receiver, filtered-OFDM signal is designed with adjustable coding modulation sets to achieve higher spectral efficiency and get along with the high-Doppler environment at the same time. Physical layer frame structure is proposed taking the Doppler frequency shift compensation into account with minimum overhead. System performance evaluations prove that transmission throughput in the dynamic communication link can be enhanced significantly by the proposed scheme, which indicates the potential for supporting future gigabit X-band reliable satellite-ground downlink transmissions.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.nssc.ac.cn/handle/122/6187
Appears in Collections:空间技术部_期刊论文

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