Inherent Limitations of Smartphone GNSS Positioning and Effective Methods to Increase the Accuracy Utilizing Dual-Frequency Measurements

Author:

Yun JeonghyeonORCID,Lim Cheolsoon,Park ByungwoonORCID

Abstract

Xiaomi Mi8 with a Broadcom BCM47755 chip, an Android smartphone that supports multi-constellation (GPS, GLONASS, Galileo, BeiDou, and QZSS) and dual-frequency (L1/E1 and L5/E5), was launched in May 2018. Unlike previously released smartphones, it was technically expected to provide robust precise positioning with a fast ambiguity resolution, which led many researchers to be overly optimistic about the applicability of high-accuracy techniques such as real-time kinematic (RTK) systems and precise point positioning (PPP) of smartphones. The global navigation satellite system (GNSS) raw measurement quality of Android smartphones is, however, inherently far lower than that of general GNSS receivers due to their structure, which accordingly makes it difficult for them to be realized. Considering inherent limitations of smartphones such as low-quality antenna, frequent cycle slips, and the duty cycle, a practical strategy including L5 measurements, pseudo-range corrections for L5, and a weighting method is proposed in this paper. The results show that the proposed methods of L5 differential GNSS (DGNSS) and Doppler-based filtering can guarantee a positioning accuracy of 1.75 m horizontally and 4.56 m vertically in an Android device, which is comparable to the performance of commercial low-cost receivers.

Funder

National R&D Project of “Development of Ground-based Centimeter level High Accuracy Augmentation Technologies for Maritime PNT” of Korea institute of Marine Science & Technology Promotion

Publisher

MDPI AG

Subject

Electrical and Electronic Engineering,Biochemistry,Instrumentation,Atomic and Molecular Physics, and Optics,Analytical Chemistry

Reference36 articles.

1. Khan, Z. (2022, November 14). Your Guide to Location Services in Android 12. Available online: https://www.androidauthority.com/android-location-services-3219012/.

2. Merano, M. (2022, November 14). Tesla FSD “Actual” Smart Summon Is Almost Done. Available online: https://www.teslarati.com/tesla-fsd-actual-smart-summon/.

3. GSARMT Force (2017). Using GNSS Raw Measurements on Android Devices: White Paper. Eur. GNSS Agency, 10, 449581.

4. DGPS Enhancement to GPS NMEA Output Data: DGPS by Correction Projection to Position-Domain;Park;J. Navig.,2013

5. Yoon, D., Kee, C., Seo, J., and Park, B. (2016). Position Accuracy Improvement by Implementing the DGNSS-CP Algorithm in Smartphones. Sensors, 16.

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