Precise Loran-C Signal Acquisition Based on Envelope Delay Correlation Method

doi:10.3390/s20082329

CORC > 国家授时中心 > 中国科学院国家授时中心 > 授时方法与技术研究室

	Precise Loran-C Signal Acquisition Based on Envelope Delay Correlation Method
	Yan, Wenhe 1,2,3; Zhao, Kunjuan 1,2,3; Li, Shifeng 1,2,3; Wang, Xinghui 1,3; Hua, Yu 1,2,3
刊名	SENSORS
	2020-04-01
卷号	20 期号:8 页码:15
关键词	Loran-C signal acquisition envelope delay correlation cross-rate interference
DOI	10.3390/s20082329
英文摘要	The Loran-C system is an internationally standardized positioning, navigation, and timing service system. It is the most important backup and supplement for the global navigation satellite system (GNSS). However, the existing Loran-C signal acquisition methods are easily affected by noise and cross-rate interference (CRI). Therefore, this article proposes an envelope delay correlation acquisition method that, when combined with linear digital averaging (LDA) technology, can effectively suppress noise and CRI. The selection of key parameters and the performance of the acquisition method are analyzed through a simulation. When the signal-to-noise ratio (SNR) is -16 dB, the acquisition probability is more than 90% and the acquisition error is less than 1 mu s. When the signal-to-interference ratio (SIR) of the CRI is -5 dB, the CRI can also be suppressed and the acquisition error is less than 5 mu s. These results show that our acquisition method is accurate. The performance of the method is also verified by actual signals emitted by a Loran-C system. These test results show that our method can reliably detect Loran-C pulse group signals over distances up to 1500 km, even at low SNR. This will enable the modern Loran-C system to be a more reliable backup for the GNSS system.
资助项目	National Natural Science Foundation of China[11803040] ; CAS "Youth Innovative Talent Project"-"Research on GNSS/Loran-C fusion technology"[Y917SC1]
WOS关键词	NAVIGATION ; PHASE ; NOISE
WOS研究方向	Chemistry ; Engineering ; Instruments & Instrumentation
语种	英语
出版者	MDPI
WOS记录号	WOS:000533346400171
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS "Youth Innovative Talent Project"-"Research on GNSS/Loran-C fusion technology" ; CAS "Youth Innovative Talent Project"-"Research on GNSS/Loran-C fusion technology" ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS "Youth Innovative Talent Project"-"Research on GNSS/Loran-C fusion technology" ; CAS "Youth Innovative Talent Project"-"Research on GNSS/Loran-C fusion technology" ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS "Youth Innovative Talent Project"-"Research on GNSS/Loran-C fusion technology" ; CAS "Youth Innovative Talent Project"-"Research on GNSS/Loran-C fusion technology" ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS "Youth Innovative Talent Project"-"Research on GNSS/Loran-C fusion technology" ; CAS "Youth Innovative Talent Project"-"Research on GNSS/Loran-C fusion technology"
内容类型	期刊论文
源URL	[http://210.72.145.45/handle/361003/9363]
专题	国家授时中心_授时方法与技术研究室
通讯作者	Yan, Wenhe
作者单位	1.Chinese Acad Sci, Key Lab Precise Positioning & Timing Technol, Xian 710600, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Natl Time Serv Ctr, Xian 710600, Peoples R China
推荐引用方式 GB/T 7714	Yan, Wenhe,Zhao, Kunjuan,Li, Shifeng,et al. Precise Loran-C Signal Acquisition Based on Envelope Delay Correlation Method[J]. SENSORS,2020,20(8):15.
APA	Yan, Wenhe,Zhao, Kunjuan,Li, Shifeng,Wang, Xinghui,&Hua, Yu.(2020).Precise Loran-C Signal Acquisition Based on Envelope Delay Correlation Method.SENSORS,20(8),15.
MLA	Yan, Wenhe,et al."Precise Loran-C Signal Acquisition Based on Envelope Delay Correlation Method".SENSORS 20.8(2020):15.