A comparative analysis of navigation signals in BDS-2 and BDS-3 using zero-baseline experiments

被引:18
作者
Deng, Chenlong [1 ]
Qi, Shufeng [1 ]
Li, Yangyang [1 ]
Wang, Yawei [1 ]
Zou, Xuan [1 ]
Tang, Weiming [1 ,2 ]
Guo, Chi [1 ,2 ]
机构
[1] Wuhan Univ, GNSS Res Ctr, 129 Luoyu Rd, Wuhan 430079, Peoples R China
[2] Collaborat Innovat Ctr Geospatial Technol, 129 Luoyu Rd, Wuhan 430079, Peoples R China
基金
中国国家自然科学基金;
关键词
BDS; Zero-baseline; Measurement noise; Inter-system bias; GPS;
D O I
10.1007/s10291-021-01178-z
中图分类号
TP7 [遥感技术];
学科分类号
081102 ; 0816 ; 081602 ; 083002 ; 1404 ;
摘要
The Chinese Beidou navigation satellite system (BDS) has provided regional and global navigation and positioning services for the users via the BDS-2 and BDS-3 satellites. However, BDS-2 and BDS-3 send navigation signals on different frequencies; three of those are identical to assure system compatibility and interoperability. To comparatively analyze these navigation signals, we carried out three zero-baseline experiments with five brands of receivers, including Trimble, Septentrio, NovAtel, ComNav and Unicore. BDS-2 and BDS-3 multi-frequency data were collected during these experiments. The data were processed to evaluate the code and carrier phase measurement noises and investigate the inter-system biases (ISBs) on the three identical frequencies. The effects of the ISB on ambiguity resolution (AR) and position estimation (PE) were also demonstrated using the zero-baseline data with one Trimble receiver and one Septentrio receiver. The results show some new findings: (1) the code and phase noises in BDS-3 are smaller than those in BDS-2 on the same frequencies, and the three new signals B1C, B2b and B2a have comparable noises to the present signals. Besides, millimeter-level code noises are achieved on B3I and B2a signals in NovAtel receivers; (2) the code ISBs on B1I, B2I/B2b and B3I between BDS-2 and BDS-3 were found and distinguished, while no phase ISB could be found. The code ISB seems to be receiver-related and can be as large as 1 m in heterogeneous receivers. It is stable during a whole day but may also vary due to a restart of the receiver. No code and phase ISB on all three frequencies is observed for homogeneous receivers; (3) the code ISB will hamper the reliable AR and precise PE. The HMW (Hatch-Melbourne-Wubbena) combination on B1I and B3I is severely biased by about 0.6 cycles when double differencing between BDS-2 and BDS-3. After ISB calibration, the ratio value of wide-lane (WL) AR has a slight increase, and the accuracy of DD B1I code positioning has improved more than 10%, but few improvements can be seen in the fixed solution. It should be noted that although the inter-system code bias (ISCB) between BDS-2 and BDS-3 is detected in the baseline data, this bias should be considered in the absolute positioning as well.
引用
收藏
页数:12
相关论文
共 23 条
[1]  
CSNO, BeiDou navigation satellite system signal in space interface control document-precise point positioning service signal PPP-B2b
[2]  
CSNO, 2017, BEIDOU NAV SAT SYST
[3]  
CSNO, 2020, COMPL COMM BEIDOU NA
[4]  
CSNO, 2020, BEIDOU NAV SAT SYST
[5]   Investigation of Tightly Combined Single-Frequency and Single-Epoch Precise Positioning Using Multi-GNSS Data [J].
Deng, Chenlong ;
Liu, Qian ;
Zou, Xuan ;
Tang, Weiming ;
Cui, Jianhui ;
Wang, Yawei ;
Guo, Chi .
REMOTE SENSING, 2020, 12 (02)
[6]  
Hatch R.R., 1982, PROC 3 INT GEODETIC, P1213
[7]   Analysis and Assessment of BDS-2 and BDS-3 Broadcast Ephemeris: Accuracy, the Datum of Broadcast Clocks and Its Impact on Single Point Positioning [J].
Jiao, Guoqiang ;
Song, Shuli ;
Liu, Yangyang ;
Su, Ke ;
Cheng, Na ;
Wang, Shengli .
REMOTE SENSING, 2020, 12 (13)
[8]   Overview of BDS III new signals [J].
Lu, Mingquan ;
Li, Wenyi ;
Yao, Zheng ;
Cui, Xiaowei .
NAVIGATION-JOURNAL OF THE INSTITUTE OF NAVIGATION, 2019, 66 (01) :19-35
[9]   Initial assessment of BDS-3 preliminary system signal-in-space range error [J].
Lv, Yifei ;
Geng, Tao ;
Zhao, Qile ;
Xie, Xin ;
Zhou, Renyu .
GPS SOLUTIONS, 2020, 24 (01)
[10]  
Melbourne W., 1985, P 1 INT S PREC POS G, P373