基于TDOA/FDOA相位条纹的高精度GPS信号跟踪方法

王芮; 王兆瑞; 李建斌; 金声震

doi:10.11999/JEIT210994

基于TDOA/FDOA相位条纹的高精度GPS信号跟踪方法

doi: 10.11999/JEIT210994

王芮^{1, 2},
王兆瑞^1, ,,
李建斌^{1, 2},
金声震¹

1.
中国科学院国家天文台北京 100101
2.
中国科学院大学天文与空间科学学院北京 100049

基金项目: 国家重点研发计划项目“精密协同定位”(2016YFB0501900)，国家自然科学基金(11603041)，天文联合基金：新型高性能宽带馈源及反射面天线赋形方法研究(U1931125)

详细信息

作者简介:
王芮：女，博士生，研究方向为卫星导航、无源定位

王兆瑞：男，副研究员，研究方向为卫星导航、非线性信号处理

李建斌：男，正高级工程师，研究方向为射电天文技术与方法、无线电监测

金声震：男，研究员，研究方向为雷达信号处理

通讯作者:
王兆瑞　zhaorui_w@nao.cas.cn

中图分类号: TN967.1
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- 文章访问数: 486
- HTML全文浏览量: 159
- PDF下载量: 75
- 被引次数: 0
出版历程
- 收稿日期: 2021-09-16
- 修回日期: 2022-03-15
- 录用日期: 2022-03-31
- 网络出版日期: 2022-04-10
- 刊出日期: 2022-09-19

High-precision GPS Signal Tracking Method Based on TDOA/FDOA Phase Stripe

WANG Rui^{1, 2},
WANG Zhaorui^{1
, ,},
LI Jianbin^{1, 2},
JIN Shengzhen¹

1.
National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China
2.
School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, China

Funds: The National Key R & D Program of China (2016YFB0501900), The National Natural Science Foundation of China (11603041), The Astronomical Union Fund: Research on Novel High Perfomance Wideband Feed and Method of Shaped Reflector Antenn (U1931125)

摘要

摘要: 针对传统GPS接收机跟踪环路结构复杂，以及在低信噪比(SNR)、高动态条件下跟踪性能较差的问题，该文提出一种基于相位条纹斜率检测的跟踪新方法。通过采用到达时差(TDOA)的频域相位测量伪码时延，到达频差(FDOA)的时域相位测量载波多普勒频偏。该方法降低了环路实现的复杂度，同时提高了跟踪精度。仿真结果验证了该方法的有效性和稳定性，在载噪比为32 dB-Hz时，相比传统方法，基于TDOA/FDOA相位条纹法的码相位测量精度提高了60%，载波多普勒测量精度提高了31%，且在高动态环境中也能实现精确跟踪，对改善GPS接收机跟踪性能具有研究意义。
- GPS /
- 码跟踪 /
- 到达时间差 /
- 载波跟踪 /
- 到达频率差 /
- 相位条纹 /
- Hough变换
Abstract: In order to solve the problems of complex tracking loop structure of traditional GPS receivers, and poor tracking performance in the environment of low Signal-to-Noise Ratio (SNR) and high dynamic, a new GPS signal tracking algorithm based on phase slope stripe detection is proposed, in which the pseudo-code delay can be accurately estimated by the Frequency domain phase of Time Difference Of Arrival (TDOA), and the carrier Doppler frequency offset can be accurately estimated by the Time domain phase of Frequency Difference Of Arrival (FDOA).The loop structure is simplified and the tracking accuracy is improved, compared with the traditional method, the code phase measurement accuracy is improved by 60% and the carrier Doppler measurement accuracy is improved by 31% when the SCNR is 32 dB-Hz. In addition, accurate tracking can be achieved in high dynamic environment, which has research significance for improving the performance of GPS receiver.
- Global Positing System (GPS) /
- Code tracking /
- Time Difference Of Arrival (TDOA) /
- Carrier tracking /
- Frequency Difference Of Arrival (FDOA) /
- Phase stripe /
- Hough transform

HTML全文

图 1 基于TDOA相位条纹的码跟踪环结构

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图 2 基于FDOA相位条纹的载波跟踪环结构

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图 3 BPSK信号的TDOA相位条纹

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图 4 有限长信号的相关计算误差

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图 5 相位条纹斜率估算过程

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图 6 Hough变换的直线参数估计

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图 7 GPS信号的时域相位谱

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图 8 相位条纹的Hough变换

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图 9 幅度加权的线性回归结果

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图 10 载波多普勒测量误差均方差对比

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图 11 码相位测量误差均方差对比

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图 12 高动态信号的载波跟踪结果

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图 13 高动态信号载波跟踪误差对比

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图 14 高动态信号码相位跟踪误差对比

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