Demodulation Method for Loran-C at Low SNR Based on Envelope Correlation-Phase Detection
文献类型：期刊论文
| 作者 | Yuan, Jiangbin1,2,3; Yan, Wenhe1,2,3; Li, Shifeng1,2,3 ; Hua, Yu1,2,3
|
| 刊名 | SENSORS
 |
| 出版日期 | 2020-08-01 |
| 卷号 | 20期号:16页码:13 |
| 关键词 | Loran-C data demodulation envelope correlation skywave interference |
| DOI | 10.3390/s20164535 |
| 英文摘要 | Loran-C is the most important backup and supplement system for the global navigation satellite system (GNSS). However, existing Loran-C demodulation methods are easily affected by noise and skywave interference (SWI). Therefore, this article proposes a demodulation method based on Loran-C pulse envelope correlation-phase detection (EC-PD), in which EC has two implementation schemes, namely moving average-cross correlation and matched correlation, to reduce the effects of noise and SWI. The mathematical models of the EC, calculation of the signal-to-noise ratio (SNR) gain, and selection of the EC schemes are given. The simulation results show that compared with an existing method, the proposed method has clear advantages: (1) The demodulation SNR threshold under Gaussian channel is only -2 dB, a reduction of 12.5 dB; (2) The probability of the demodulated SNR threshold, being less than zero under the SWI environment, can reach 0.78, a 26-fold increase. The test results show that the average data availability of the proposed method is 3.3 times higher than that of the existing method. Thus, our demodulation method has higher engineering application value. This will improve the performance of the modern Loran-C system, making it a more reliable backup for the GNSS. |
| WOS关键词 | SKYWAVE DELAY ESTIMATION ; DATA MODULATION |
| 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研究方向 | Chemistry ; Engineering ; Instruments & Instrumentation |
| 语种 | 英语 |
| WOS记录号 | WOS:000568597800001 |
| 出版者 | MDPI |
| 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" |
| 源URL | [http://210.72.145.45/handle/361003/12036]  |
| 专题 | 中国科学院国家授时中心 |
| 通讯作者 | Yuan, Jiangbin |
| 作者单位 | 1.Chinese Acad Sci, Natl Time Serv Ctr, Xian 710600, Peoples R China 2.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Key Lab Precise Positioning & Timing Technol, Xian 71060, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yuan, Jiangbin,Yan, Wenhe,Li, Shifeng,et al. Demodulation Method for Loran-C at Low SNR Based on Envelope Correlation-Phase Detection[J]. SENSORS,2020,20(16):13. |
| APA | Yuan, Jiangbin,Yan, Wenhe,Li, Shifeng,&Hua, Yu.(2020).Demodulation Method for Loran-C at Low SNR Based on Envelope Correlation-Phase Detection.SENSORS,20(16),13. |
| MLA | Yuan, Jiangbin,et al."Demodulation Method for Loran-C at Low SNR Based on Envelope Correlation-Phase Detection".SENSORS 20.16(2020):13. |
入库方式： OAI收割
来源：国家授时中心
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。