Preliminary Assessment of Dual-Frequency BDS Measurement on Smartphone

Weixiang Chen, Tengfei Wang, Yunhan Qi, Zheng Yao, and Mingquan Lu

Abstract:	In this research, we investigate the GNSS data availability in various bands. The results demonstrate the support of different models and bands for BDS and GPS signal. We show that pseudorange for the B1 band has been widely utilized in smartphones, with manufactures adding support for B2 pseudorange in recent smartphones. However, the smartphones support dual-frequency carrier phase observation for BDS are scarace. It is observed that smartphones and geodetic receivers exhibit different characteristics in the correlation between Carrier-to-Noise Ratio(CNR) and elevation. Furthermore, the average CNR of the B2 signal in smartphones is lower than that of the B1 band. Similar trends are also evident in the L5 and L1 bands, which is not observed in geodetic receivers. In our analysis of pseudorange noise, we employed Double Difference (DD) residuals analysis and Time Difference Double Difference(TD-DD) residuals to examine the observation noise of BDS. Our findings indicate that the standard deviation of TD-DD residuals analysis for satellites in the B2 band is smaller than that of the B1 band, suggesting that the B2 band exhibits superior noise resistance performance. Finally, the positioning experimental results demonstrate that in open environments, the Huawei p50pro achieved the minimum single point positioning (SPP) error, the Root Mean Square Error (RMSE) in E-N plane are 6.26m, 5.04m and 3.66m for BDS, GPS, and BDS+GPS. Among tested smartphones equipped with carrier phase measurements, the Huawei p50pro also achieved the minimum real time kinematic(RTK) positioning horizontal error, the RMSE in E-N plane are 2.00m, 1.03m and 0.53m for BDS, GPS, and BDS+GPS.
Published in:	Proceedings of the ION 2024 Pacific PNT Meeting April 15 - 18, 2024 Hilton Waikiki Beach Honolulu, Hawaii
Pages:	195 - 205
Cite this article:	Chen, Weixiang, Wang, Tengfei, Qi, Yunhan, Yao, Zheng, Lu, Mingquan, "Preliminary Assessment of Dual-Frequency BDS Measurement on Smartphone," Proceedings of the ION 2024 Pacific PNT Meeting, Honolulu, Hawaii, April 2024, pp. 195-205. https://doi.org/10.33012/2024.19651
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