| 北斗系统导航信号标称失真研究 |
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| 引用本文： | 康立,王雪,熊定喜,饶永南,卢晓春,贺成艳.北斗系统导航信号标称失真研究[J].电子学报,2018,46(12):2848-2853. |
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| 作者姓名： | 康立 王雪 熊定喜 饶永南 卢晓春 贺成艳 |
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| 作者单位： | 1. 中国科学院国家授时中心, 陕西西安 710600;
2. 中国科学院精密导航定位与定时技术重点实验室, 陕西西安 710600;
3. 中国科学院大学电子电气与通信工程学院, 北京 101408;
4. 北京跟踪与通信技术研究所, 北京 100094 |
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| 摘 要： | 北斗卫星导航系统（BDS）信号均存在细微的标称失真，传统的研究聚焦于单星信号失真，无法从系统上定量测量各信号由于标称失真带来的测距偏差.该文以大口径天线接收系统采集数据结合软件接收机，从时域波形、通道特性和测距偏差上分析北斗系统B1I信号标称失真.首先利用码相位累加平均方法和标准码片相关技术提取信号时域失真细节，并计算各卫星数字失真量.其次，运用最小二乘法估计信号通道特性，对比分析所有卫星信号通道特性；最后以S曲线过零点偏差（S-Curve Bias，SCB）定量分析B1I信号自然测距偏差及最大测距偏差.文章从多维度定量对比研究了北斗系统B1I信号标称失真，给卫星导航空间信号质量评估和接收机设计提供了新的思路.
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| 关 键 词： | 卫星导航 标称失真 测距偏差 时域波形 通道特性 |
| 收稿时间： | 2017-12-18 |
Nominal Deformations Analysis of BDS Navigation Signal |
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| KANG Li,WANG Xue,XIONG Ding-xi,RAO Yong-nan,LU Xiao-chun,HE Cheng-yan.Nominal Deformations Analysis of BDS Navigation Signal[J].Acta Electronica Sinica,2018,46(12):2848-2853. |
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| Authors: | KANG Li WANG Xue XIONG Ding-xi RAO Yong-nan LU Xiao-chun HE Cheng-yan |
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| Affiliation: | 1. National Time Service Center, Chinese Academy of Sciences, Xi'an, Shaanxi 710600, China;
2. Key laboratory of Precision Navigation, Positioning and Timing, National Time Service Center, Chinese Academy of Sciences, Xi'an, Shaanxi 710600, China;
3. School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 101408, China;
4. Beijing Tracking and Communication Technology Institution, Beijing 100094, China |
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| Abstract: | Beidou satellite navigation system (BDS) contains subtle nominal deformations.The traditional research focuses on deformation of single satellite and cannot quantitatively calculate the ranging biases due to nominal deformations.This paper analyzes BDS B1I signal nominal deformations based on time waveform,channel characteristics and ranging biases.The data are from big antenna receiving system combined with software receivers.Firstly,the cumulative averaging method and standard chip correlation technique are used to extract the details of signal deformations,and the digital distortion value of each satellite is calculated.Then,channel characteristics of all satellite signals are analyzed based on least square method.Lastly B1I signal natural ranging biases and the maximum ranging biases are analyzed quantitatively by S-curve bias.The nominal deformations of B1I signal are comparatively studied from multiple dimensions and the results presented could provide a new thought for signal-in-space assessment and receiver design. |
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| Keywords: | satellite navigation nominal deformations ranging biases time waveform channel characteristics |
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