Assessment of Dual Frequency GNSS Observations from a Xiaomi Mi 8 Android Smartphone and Positioning Performance Analysis

Autor: Umberto Robustelli, Valerio Baiocchi, Giovanni Pugliano
Přispěvatelé: Robustelli, U., Baiocchi, V., Pugliano, G.
Rok vydání: 2019
Předmět:
010504 meteorology & atmospheric sciences
Matlab compact3 TEQC parser
Computer Networks and Communications
Computer science
Real-time computing
lcsh:TK7800-8360
Satellite system
Android smartphone GNSS raw observations
Galileo E5a
multipath assessment
static positioning
Xiaomi Mi 8
02 engineering and technology
01 natural sciences
symbols.namesake
0202 electrical engineering
electronic engineering
information engineering
Galileo (satellite navigation)
Electrical and Electronic Engineering
0105 earth and related environmental sciences
business.industry
lcsh:Electronics
Pseudorange
Geodetic datum
020206 networking & telecommunications
Hardware and Architecture
Control and Systems Engineering
GNSS applications
Signal Processing
Global Positioning System
symbols
Android smartphone GNSS raw observation
GLONASS
Satellite
business
Multipath propagation
Zdroj: Electronics
Volume 8
Issue 1
Electronics, Vol 8, Iss 1, p 91 (2019)
ISSN: 2079-9292
DOI: 10.3390/electronics8010091
Popis: On May 2018 the world&rsquo
s first dual-frequency Global Navigation Satellite System (GNSS) smartphone produced by Xiaomi equipped with a Broadcom BCM47755 chip was launched. It is able to receive L1/E1/ and L5/E5 signals from GPS, Galileo, Beidou, and GLONASS (GLObal NAvigation Satellite System) satellites. The main aim of this work is to achieve the phone&rsquo
s position by using multi-constellation, dual frequency pseudorange and carrier phase raw data collected from the smartphone. Furthermore, the availability of dual frequency raw data allows to assess the multipath performance of the device. The smartphone&rsquo
s performance is compared with that of a geodetic receiver. The experiments were conducted in two different scenarios to test the smartphone under different multipath conditions. Smartphone measurements showed a lower C/N0 and higher multipath compared with those of the geodetic receiver. This produced negative effects on single-point positioning as showed by high root mean square error (RMS). The best positioning accuracy for single point was obtained with the E5 measurements with a DRMS (horizontal root mean square error) of 4.57 m. For E1/L1 frequency, the 2DRMS was 5.36 m. However, the Xiaomi Mi 8, thanks to the absence of the duty cycle, provided carrier phase measurements used for a static single frequency relative positioning with an achieved 2DRMS of 1.02 and 1.95 m in low and high multipath sites, respectively.
Databáze: OpenAIRE
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