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浙江大学学报(工学版)
通信工程、自动化技术     
基于信号体制的热噪声模型及对RAIM的影响
贺刘1, 姚铮1, 崔晓伟1, 陆明泉1, 郭婧2
1.清华大学 电子工程系,北京100084;2.中国民航科学技术研究院,北京 100084
Signal structure based thermal noise model and its influence on RAIM
HE Liu1, YAO Zheng1, CUI Xiao-wei1, LU Ming-quan1, GUO Jing2
1. Department of Electronic Engineering, Tsinghua University, Beijing 100084, China; 2. Chinese Civil Aviation Institute of Science and Technology, Beijing 100084, China
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摘要:

针对因信号体制因素带来的传统加权模型偏差问题,通过分析几种典型信号结构在接收机码跟踪环路跟踪精度上的差异性,提出基于信号体制的接收机伪距误差热噪声模型,推导各频点测距加权因子的产生方式.结合传统双频组合噪声方差估计,探讨新模型对加权接收机自主完好性监测(RAIM)性能及定位估计精度的影响.仿真测试表明,采用该模型能够优化提升RAIM故障检测率,提升各频点测距置信度水平,有效地保证定位精度.

Abstract:

A receiver thermal noise model based on signal structures for code tracking errors was proposed by analyzing the code tracking accuracy diversity for several typical signal structures in delay-locked loop of receivers in order to eliminate the bias due to the signal structures in traditional weighted model. The formulas of calculated weighted values were derived. With the noise variance estimate of traditional dual-frequency model, the influence of the novel model on both performance of weighted receiver autonomous integrity monitoring (RAIM) and positioning solution accuracy was explored. Simulation results show that the proposed model can promote fault detection rate, obtain the improved confidence and guarantee the positioning accuracy.

出版日期: 2015-04-01
:  TN 967  
基金资助:

国家自然科学基金联合基金重点资助项目(U1333203);国家重大科学仪器设备开发专项资金资助项目(2012YQ140026)

通讯作者: 姚铮,男,助理教授     E-mail: yaozheng@tsinghua.edu.cn
作者简介: 贺刘(1985—),男,硕士生,从事卫星导航后处理关键算法的研究.E-mail: hl12@mails.tsinghua.edu.cn
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引用本文:

贺刘, 姚铮, 崔晓伟, 陆明泉, 郭婧. 基于信号体制的热噪声模型及对RAIM的影响[J]. 浙江大学学报(工学版), 10.3785/j.issn.1008-973X.2015.04.015.

HE Liu, YAO Zheng, CUI Xiao-wei, LU Ming-quan, GUO Jing. Signal structure based thermal noise model and its influence on RAIM. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 10.3785/j.issn.1008-973X.2015.04.015.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2015.04.015        http://www.zjujournals.com/eng/CN/Y2015/V49/I4/711

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