Evaluation of raw GNSS measurements collected from Android phones
In this dissertation, we used a data logger app developed by Google to collect the Global Navigation Satellite System (GNSS) raw measurements on an Android smartphone. Based on the raw GNSS measurement data collected, we classify and analyse the various types of information in the data logs, use the...
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| Format: | Thesis-Master by Coursework |
| Language: | English |
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Nanyang Technological University
2023
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| Online Access: | https://hdl.handle.net/10356/163998 |
| _version_ | 1826114548064583680 |
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| author | Lin, Minyi |
| author2 | Ling Keck Voon |
| author_facet | Ling Keck Voon Lin, Minyi |
| author_sort | Lin, Minyi |
| collection | NTU |
| description | In this dissertation, we used a data logger app developed by Google to collect the Global Navigation Satellite System (GNSS) raw measurements on an Android smartphone. Based on the raw GNSS measurement data collected, we classify and analyse the various types of information in the data logs, use the pseudorange observations at different time, and also the ephemeris to estimate the coordinates of position and corresponding velocity of the user in the dynamic and static tests. We compare the performance of two positioning algorithms, namely Weighted Least Square (WLS) and Moving Horizon Estimation (MHE). The position and trajectory given by the U-blox professional receiver are used as the ground truth for this comparison. The experiment results show that the position and trajectory estimated by the MHE are more accurate and have fewer Root-Mean-Square-Errors (RMSEs) than that of the WLS. Moreover, in the MHE algorithm, the range of referenced data within 5 to 8 seconds has a relatively good estimation performance in the dynamic test, while the performance becomes better with a more extensive range of referenced data in the static test. |
| first_indexed | 2024-10-01T03:40:55Z |
| format | Thesis-Master by Coursework |
| id | ntu-10356/163998 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:40:55Z |
| publishDate | 2023 |
| publisher | Nanyang Technological University |
| record_format | dspace |
| spelling | ntu-10356/1639982023-01-03T05:25:38Z Evaluation of raw GNSS measurements collected from Android phones Lin, Minyi Ling Keck Voon School of Electrical and Electronic Engineering EKVLING@ntu.edu.sg Engineering::Electrical and electronic engineering In this dissertation, we used a data logger app developed by Google to collect the Global Navigation Satellite System (GNSS) raw measurements on an Android smartphone. Based on the raw GNSS measurement data collected, we classify and analyse the various types of information in the data logs, use the pseudorange observations at different time, and also the ephemeris to estimate the coordinates of position and corresponding velocity of the user in the dynamic and static tests. We compare the performance of two positioning algorithms, namely Weighted Least Square (WLS) and Moving Horizon Estimation (MHE). The position and trajectory given by the U-blox professional receiver are used as the ground truth for this comparison. The experiment results show that the position and trajectory estimated by the MHE are more accurate and have fewer Root-Mean-Square-Errors (RMSEs) than that of the WLS. Moreover, in the MHE algorithm, the range of referenced data within 5 to 8 seconds has a relatively good estimation performance in the dynamic test, while the performance becomes better with a more extensive range of referenced data in the static test. Master of Science (Computer Control and Automation) 2023-01-03T05:25:38Z 2023-01-03T05:25:38Z 2022 Thesis-Master by Coursework Lin, M. (2022). Evaluation of raw GNSS measurements collected from Android phones. Master's thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/163998 https://hdl.handle.net/10356/163998 en application/pdf Nanyang Technological University |
| spellingShingle | Engineering::Electrical and electronic engineering Lin, Minyi Evaluation of raw GNSS measurements collected from Android phones |
| title | Evaluation of raw GNSS measurements collected from Android phones |
| title_full | Evaluation of raw GNSS measurements collected from Android phones |
| title_fullStr | Evaluation of raw GNSS measurements collected from Android phones |
| title_full_unstemmed | Evaluation of raw GNSS measurements collected from Android phones |
| title_short | Evaluation of raw GNSS measurements collected from Android phones |
| title_sort | evaluation of raw gnss measurements collected from android phones |
| topic | Engineering::Electrical and electronic engineering |
| url | https://hdl.handle.net/10356/163998 |
| work_keys_str_mv | AT linminyi evaluationofrawgnssmeasurementscollectedfromandroidphones |