期刊文献+

eLoran系统新型信号波形设计及其性能评估

Design and performance evaluation of new signal waveform in eLoran system
在线阅读 下载PDF
收藏 分享 导出
摘要 增强型罗兰导航系统(eLoran)作为全球卫星导航系统(GNSS)的备份系统,是国家定位导航授时(PNT)安全的重要基础设施.针对目前标准eLoran信号存在易受交叉干扰、天波干扰,通信数据传输速率低等的问题,本文基于标准罗兰信号体制提出了两种波形改进方法(衰减函数法与对称波形法)并对新型波形进行性能评估.实验结果表明,两种方法能够有效缩短波形持续时间,加速后沿波形下降,减小发射机功耗.对称波形法能够大幅减小波形持续时间,但缩短波形持续时间也将改变原信号波形的频谱特性,利用衰减函数法可以最大程度保证信号的频谱性能.综合分析可知,新型波形能够有效利用时域资源,空余的时间可用于增加传输信号,进而提高数据调制技术的性能. As a backup system of satellite navigation system,the enhanced Loran navigation system is a vital development strategy for national PNT(Positioning,Navigation,Timing).At present,the signal of eLoran are vulnerable to cross interference and sky-wave interference,and the rate of transmitting data is low.Therefore we proposed two waveform improvement methods(attenuation-function-method and symmetric-waveform-method)and evaluated the performance of them based on standard Loran signal system.Experimental results show that the two methods can effectively shorten the duration of the waveform,accelerate the decline of the waveform,and reduce the signal transmitting power.The symmetrical-waveform-method can greatly reduce the duration of waveform,but this method will significantly change the spectrum characteristics of the original signal waveform.By contrast,the attenuation-function-method can ensure the spectrum performance of the signal to the greatest extent.Through comprehensive analysis,we think that the new waveform can effectively utilize time domain resources,which can spare time for extra signal transmitting and consequently raise the efficiency of data modulation.
作者 李婉清 刘中伟 李实锋 叶清琳 LI Wanqing;LIU Zhongwei;LI Shifeng;YE Qinglin(School of Electronics and Communication Engineering Sun Yat-sen University,Guangzhou 510006,China;School of Information and Communication,National University of Defense Technology,Xi′an 710106,China;National Time Service Center,Chinese Academy of Sciences,Xi′an 710600,China;China Communications Information Technology Group Co.,Ltd,Beijing 100011,China)
出处 《全球定位系统》 CSCD 2020年第2期13-20,共8页 Gnss World of China
基金 国家自然科学基金(61973328) 国家重点研发计划重点专项(2018YFB0505200)。
关键词 增强罗兰导航系统 信号体制 波形设计 性能评估 频谱分析 advanced Loran navigation system new signal system waveform design performance assessment spectrum analysis
  • 相关文献

参考文献5

二级参考文献39

  • 1杨元喜 ,高为广 .基于多传感器观测信息抗差估计的自适应融合导航[J].武汉大学学报:信息科学版,2004,29(10):885-888. 被引量:19
  • 2高为广,杨元喜,张双成.基于当前加速度模型的抗差自适应Kalman滤波[J].测绘学报,2006,35(1):15-18. 被引量:28
  • 3吴富梅,杨元喜.基于高阶AR模型的陀螺随机漂移模型[J].测绘学报,2007,36(4):389-394. 被引量:22
  • 4Department of Transportation and Department of Defense of USA. National Positioning, Navigation, and Timing Architecture Implementation Plan[-R3.[-S.1.3~ Department of Transportation and Department of Defense of USA,2010. 被引量:1
  • 5MCNEFF J. Changing the Game Changer~The Way Ahead for Military PNT[-J~. Inside GNSS,2010, 5(8) ~ 44-45. 被引量:1
  • 6LI Naihe, ZHANG Yonghong, XI Huan. Some Cognition on the New PNT Technology under Designed by USA[-J~. Satellite Application, 2015(12) : 34-37. 被引量:1
  • 7PARKINSON B. Assured PNT for Our Future: PTA. Actions Necessary to Reduce Vulnerability and Ensure AvailabilityEC~ //The 25th Anniversary GNSS History Special Supplement. [-S.I.~ ~ GPS World staff 2014. 被引量:1
  • 8PARKINSON B. A PAT Program and Specific Challenges to PNT, Presentation talk in ICG 10 [-R~. Boulder: [s.n.~, 2015. 被引量:1
  • 9YANG Yuanxi. Progress, Contribution and Challenges of Compass/BeiDou Satellite Navigation System [- Jl. Aeta Geodaetiea et Cartographiea Siniea, 2010, 39(1): 1-6. 被引量:1
  • 10YANG Yuanxi, LU Mingquan, HAN Chunhao. Some Notes on Interoperability of GNSSEJ].Acta Geodaetiea et Cartographica Sinica, 2016, 45 (3) ~ 253-259. DOI~ 10. 11947/j.AGCS.2016.20150653. 被引量:1

共引文献68

论文智能改写系统
维普数据出版直通车
投稿分析
职称考试

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部 意见反馈