干旱区生态环境知识资源中心(Arid): Folded Chirp-Rate Shift Keying Modulation for LEO Satellite IoT

Arid

DOI	10.1109/ACCESS.2019.2930327
	Folded Chirp-Rate Shift Keying Modulation for LEO Satellite IoT
	Yang, Chao 1; Wang, Mei 2; Zheng, Lin 1,3; Zhou, Guangpeng 1
通讯作者	Wang, Mei
来源期刊	IEEE ACCESS
ISSN	2169-3536
出版年	2019
卷号	7 页码:99451-99461
英文摘要	In the low earth orbit (LEO) satellite Internet of Things (IoT), the IoT devices can be distributed in remote areas (e.g., desert, ocean, and forest) for some special applications, where they are unable to have direct terrestrial network accesses and can only be covered by satellite. But in the LEO satellite scenario, it has to face the effects of high doppler and fast doppler rate, due to satellite movement at high speed and utilization of higher frequency bands. So fine frequency synchronization and frequency track are necessary to be done, even for LORA. In this paper, we propose a folded chirp-rate shift keying (FCrSK) modulation with strong immunity to doppler effect. Its data information is mapped to different folded chirp-rate waveforms, which have an advantage of the consistency of bandwidth and symbol length among chirp-rates compared to traditional chirp-rate shift keying system. Moreover, we analyze the optimal non-coherent receiver in case of the doppler channel, whose optimal decision depends on signal energy focusability in frequency spectrum after dechirp, so frequency peak average rate adopts as a decision criterion. Furthermore, system parameters' setting is discussed so as to maximize system modulation efficiency with the minimum interference among chirp-rate. Finally, some simulations are provided to analyze robustness to doppler shift and doppler-rate in the system. And based on universal software radio platform (USRP), some experimental measurements are made to validate its feasibility under the realistic wireless environment and doppler environment.
英文关键词	Chirp rate shift keying (CrSK) chirp spread spectrum (CSS) Internet of Things (IoT) LORA low-Earth orbit (LEO) satellites
类型	Article
语种	英语
国家	Peoples R China
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000480334100024
WOS关键词	SPREAD-SPECTRUM ; INTERNET
WOS类目	Computer Science, Information Systems ; Engineering, Electrical & Electronic ; Telecommunications
WOS研究方向	Computer Science ; Engineering ; Telecommunications
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/216236
作者单位	1.Guilin Univ Elect Technol, Guangxi Key Lab Wireless Wideband Commun & Signal, Guilin 541004, Peoples R China; 2.Guilin Univ Technol, Inst Informat Sci & Engn, Guilin 541004, Peoples R China; 3.Sci & Technol Commun Networks Lab, Shijiazhuang 050081, Hebei, Peoples R China
推荐引用方式 GB/T 7714	Yang, Chao,Wang, Mei,Zheng, Lin,et al. Folded Chirp-Rate Shift Keying Modulation for LEO Satellite IoT[J],2019,7:99451-99461.
APA	Yang, Chao,Wang, Mei,Zheng, Lin,&Zhou, Guangpeng.(2019).Folded Chirp-Rate Shift Keying Modulation for LEO Satellite IoT.IEEE ACCESS,7,99451-99461.
MLA	Yang, Chao,et al."Folded Chirp-Rate Shift Keying Modulation for LEO Satellite IoT".IEEE ACCESS 7(2019):99451-99461.