Performance analysis of frequency‑mixed PPP‑RTK using low‑cost GNSS chipset with different antenna configurations  

作　　者：Xingxing Li Hailong Gou Xin Li Zhiheng Shen Hongbo Lyu Yuxuan Zhou Hao Wang Qian Zhang 

机构地区：[1]School of Geodesy and Geomatics,Wuhan University,129 Luoyu Road,Wuhan 430079,Hubei,China [2]Hubei Luojia Laboratory,Wuhan University,129 Luoyu Road,Wuhan 430079,Hubei,China [3]Tianjin Navigation Instrument Research Institute,268 Dingzigu 1St Road,Tianjin 300130,China [4]Meituan,6 Wangjing East Road,Chaoyang District,Beijing,China

出　　处：《Satellite Navigation》2023年第3期54-71,共18页卫星导航（英文）

基　　金：National Natural Science Foundation of China,41974027,Xingxing Li;42204017,Xin Li;National Postdoctoral Program for Innovative Talents,China,BX20220239,Xin Li;the special fund of Hubei Luojia Laboratory,220100006,Xin Li;the Fundamental Research Funds for the Central Universities,2042022kf1001,Xin Li.

摘　　要：Low-cost Global Navigation Satellite System(GNSS)devices offer a cost-effective alternative to traditional GNSS systems,making GNSS technology accessible to a wider range of applications.Nevertheless,low-cost GNSS devices often face the challenges in effectively capturing and tracking satellite signals,which leads to losing the observations at certain frequencies.Moreover,the observation peculiarities of low-cost devices are in contradistinction to those of traditional geodetic GNSS receivers.In this contribution,a low-cost PPP-RTK model that considers the unique characteristics of different types of measurements is developed and its performance is fully evaluated with u-blox F9P receivers equipped with three distinctive antenna configurations:vertical dipole,microstrip patch,and helix antennas.Several static and kinematic experiments in different scenarios are conducted to verify the effectiveness of the proposed method.The results indicate that the mixed-frequency PPP-RTK model outperforms the traditional dual-frequency one with higher positioning accuracy and fixing percentage.Among the three low-cost antennas tested,the vertical dipole antenna demonstrates the best performance under static conditions and shows a comparable performance as geodetic antennas with a positioning accuracy of 0.02 m,0.01 m and 0.07 m in the east,north,and up components,respectively.Under low-speed kinematic scenarios,the helix antenna outperforms the other two with a positioning accuracy of(0.07 m,0.07 m,0.34 m).Furthermore,the helix antenna is also proved to be the best choice for vehicle navigation with an ambiguity fixing rate of over 95%and a positioning accuracy of(0.13 m,0.14 m,0.36 m).

关 键 词：PPP-RTK Low-cost device Rapid ambiguity resolution Centimeter-level positioning accuracy Performance assessment 

分 类 号：TN967.1[电子电信—信号与信息处理]