Position Accuracy Improvement by Implementing the DGNSS-CP Algorithm in Smartphones
The position accuracy of Global Navigation Satellite System (GNSS) modules is one of the most significant factors in determining the feasibility of new location-based services for smartphones. Considering the structure of current smartphones, it is impossible to apply the ordinary range-domain Diffe...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2016-06-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/16/6/910 |
| _version_ | 1828118932518600704 |
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| author | Donghwan Yoon Changdon Kee Jiwon Seo Byungwoon Park |
| author_facet | Donghwan Yoon Changdon Kee Jiwon Seo Byungwoon Park |
| author_sort | Donghwan Yoon |
| collection | DOAJ |
| description | The position accuracy of Global Navigation Satellite System (GNSS) modules is one of the most significant factors in determining the feasibility of new location-based services for smartphones. Considering the structure of current smartphones, it is impossible to apply the ordinary range-domain Differential GNSS (DGNSS) method. Therefore, this paper describes and applies a DGNSS-correction projection method to a commercial smartphone. First, the local line-of-sight unit vector is calculated using the elevation and azimuth angle provided in the position-related output of Android’s LocationManager, and this is transformed to Earth-centered, Earth-fixed coordinates for use. To achieve position-domain correction for satellite systems other than GPS, such as GLONASS and BeiDou, the relevant line-of-sight unit vectors are used to construct an observation matrix suitable for multiple constellations. The results of static and dynamic tests show that the standalone GNSS accuracy is improved by about 30%–60%, thereby reducing the existing error of 3–4 m to just 1 m. The proposed algorithm enables the position error to be directly corrected via software, without the need to alter the hardware and infrastructure of the smartphone. This method of implementation and the subsequent improvement in performance are expected to be highly effective to portability and cost saving. |
| first_indexed | 2024-04-11T13:39:52Z |
| format | Article |
| id | doaj.art-75d402ca4a5b4b73b1237dd818c7710d |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T13:39:52Z |
| publishDate | 2016-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-75d402ca4a5b4b73b1237dd818c7710d2022-12-22T04:21:18ZengMDPI AGSensors1424-82202016-06-0116691010.3390/s16060910s16060910Position Accuracy Improvement by Implementing the DGNSS-CP Algorithm in SmartphonesDonghwan Yoon0Changdon Kee1Jiwon Seo2Byungwoon Park3School of Aerospace Engineering, Sejong University, Seoul 05006, KoreaInstitute of Advanced Aerospace Technology, School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 08826, KoreaSchool of Integrated Technology and Yonsei Institute of Convergence Technology, Yonsei University, Incheon 21983, KoreaSchool of Aerospace Engineering, Sejong University, Seoul 05006, KoreaThe position accuracy of Global Navigation Satellite System (GNSS) modules is one of the most significant factors in determining the feasibility of new location-based services for smartphones. Considering the structure of current smartphones, it is impossible to apply the ordinary range-domain Differential GNSS (DGNSS) method. Therefore, this paper describes and applies a DGNSS-correction projection method to a commercial smartphone. First, the local line-of-sight unit vector is calculated using the elevation and azimuth angle provided in the position-related output of Android’s LocationManager, and this is transformed to Earth-centered, Earth-fixed coordinates for use. To achieve position-domain correction for satellite systems other than GPS, such as GLONASS and BeiDou, the relevant line-of-sight unit vectors are used to construct an observation matrix suitable for multiple constellations. The results of static and dynamic tests show that the standalone GNSS accuracy is improved by about 30%–60%, thereby reducing the existing error of 3–4 m to just 1 m. The proposed algorithm enables the position error to be directly corrected via software, without the need to alter the hardware and infrastructure of the smartphone. This method of implementation and the subsequent improvement in performance are expected to be highly effective to portability and cost saving.http://www.mdpi.com/1424-8220/16/6/910smartphoneandroidlocation-based systemglobal navigation satellite systemdifferential GNSS |
| spellingShingle | Donghwan Yoon Changdon Kee Jiwon Seo Byungwoon Park Position Accuracy Improvement by Implementing the DGNSS-CP Algorithm in Smartphones Sensors smartphone android location-based system global navigation satellite system differential GNSS |
| title | Position Accuracy Improvement by Implementing the DGNSS-CP Algorithm in Smartphones |
| title_full | Position Accuracy Improvement by Implementing the DGNSS-CP Algorithm in Smartphones |
| title_fullStr | Position Accuracy Improvement by Implementing the DGNSS-CP Algorithm in Smartphones |
| title_full_unstemmed | Position Accuracy Improvement by Implementing the DGNSS-CP Algorithm in Smartphones |
| title_short | Position Accuracy Improvement by Implementing the DGNSS-CP Algorithm in Smartphones |
| title_sort | position accuracy improvement by implementing the dgnss cp algorithm in smartphones |
| topic | smartphone android location-based system global navigation satellite system differential GNSS |
| url | http://www.mdpi.com/1424-8220/16/6/910 |
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