【摘 要】
：
The E1A signal of Galileo system provides high-precision location information service for authorized users. The confidentiality of codes and the auto-correlation multi-peaks of high-order Binary Offse
【机 构】
：
National Time Service Center. CAS, Xi'an, China;Key Laboratory of Precision Navigation Positioning
论文部分内容阅读
The E1A signal of Galileo system provides high-precision location information service for authorized users. The confidentiality of codes and the auto-correlation multi-peaks of high-order Binary Offset Carrier lead to the lack of relevant research on the quality assessment of E1A signal in the real environment. In this paper, two kinds of high-order BOC tracking algorithms including Bump-Jump and Double Estimator (DET) Technical are studied ,then their principles how to eliminate the correlation curve multi-peaks are introduced and compared about advantages and disadvantages. Based on DET, the E1A tracking loop is initialized by using the E1B signals carrier information, and then the spreading code modulated message symbol is accurately recovered by waveform-matching method, so the tracking problem of the E1A actual signal is solved. Based on the tracking information of E1A signal, we perform the evaluation of S-Curve Bias (SCB) and correlation loss, and compared those with E1B signal. The results show that the E1A signal correlation loss is greater than the E1B signal, and within 0.15 chip correlator spacing, both SCB are within 0.1ns. The results have verified the effectiveness of the assessment method of E1A signal quality, as an important reference for improving signal analysis and assessment of GNSS.
其他文献
This paper focuses on the approach to attitude estimation. When describing the attitude of a dynamic object, the quaternion has a better numerical continuity and stability compared with other conventi
The message service is the most distinctive part of the BeiDou System (BDS), whose coverage area will be expanded from China & surroundings to the global surface space at BDS-3 stage. This is an innov
Snowfall is an important freshwater resource; manual monitoring and laser detection can monitor snow to a certain extent, but there is a lot of uncertainty in time and space.Traditional ground-based g
This Soil moisture is an important part of the surface water cycle. Effective monitoring of soil moisture is of great significance for weather forecasting, flood forecasting and crop growth. Existing
Compared with the current multi-step method to solve the coordinate of the transponder, the combined solution of GNSS observation data and acoustic observation data is more consistent with the actual
Water vapor is the most active component of the atmosphere, playing a significant role in formation of severe weather such as thunderstorms and hail. Therefore, accurate water vapor information is of
The monitoring of sea level change is a hot issue in the field of marine environment and global climate change research. With the rapid development of GNSS theory and application, GPS-MR technology ba
In order to verify and evaluate the correction precision of the model and parameters of Klobuchar 8 parameters (k8) and Klobuchar 9 parameters (k9) of BDS global ionospheric delay correction model (BD
The ocean tide model is an important factor in determining high-precision and high-resolution gravity field models, sea surface topography and ocean circulation. With the rapidly development of GNSS t
Inter-frequency clock bias (IFCB) should be considered when performing triple-frequency GNSS precise point positioning (PPP). Traditional approach of IFCB estimation is by averaging IFCB of all statio