Effects of ionosphere dispersion on wideband GNSS signals
Wideband GNSS signals suffer signal distortions such as waveform deformations and correlation peak reduction when traverse the ionosphere. Basing on the standard model of the ionosphere, we first demonstrate a modified ionosphere model to capture the ionosphere dispersion effects on wideband signals...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-02-01
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| Series: | Frontiers in Physics |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fphy.2023.1103159/full |
| _version_ | 1811165239356424192 |
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| author | Danning Zhao Danning Zhao Yu Lei |
| author_facet | Danning Zhao Danning Zhao Yu Lei |
| author_sort | Danning Zhao |
| collection | DOAJ |
| description | Wideband GNSS signals suffer signal distortions such as waveform deformations and correlation peak reduction when traverse the ionosphere. Basing on the standard model of the ionosphere, we first demonstrate a modified ionosphere model to capture the ionosphere dispersion effects on wideband signals. We decompose the first-order ionosphere model into Taylor series. By using the first three terms of Taylor series, it is possible to account for all frequency components of wideband signals rather than treating them as single tone. We then make an analysis of the ionosphere dispersion effects on wideband GNSS signal tracking. It is revealed that the ionosphere dispersion degrades correlation peak results and shifts carrier-phase in the phase locked loop (PLL) output but dose not cause an additional delay for code measurements. Furthermore, we carry out a simulation for evaluating the ionosphere dispersion effects on tracking of various new generation wideband GNSS signals such as Galileo E5 AltBOC(15, 10) signals and BDS B3 BOC(15, 2.5) signals during ionosphere quietness and activities. The results show that the wider the bandwidth and the greater the total electron content (TEC) values, the more dramatic the ionosphere effects are. The Galileo E5 AltBOC(15, 10) signals are most affected among various wideband GNSS signals. For AltBOC(15, 10) signal tracking the correlation power loss is around 0.1 dB and the carrier-phase change is about 20° caused by the dispersion in quiet ionosphere case, and increases up to 0.35 dB and 33° during ionosphere activities, respectively. |
| first_indexed | 2024-04-10T15:34:05Z |
| format | Article |
| id | doaj.art-07feedbce21f43cf84175fe8753ad2ed |
| institution | Directory Open Access Journal |
| issn | 2296-424X |
| language | English |
| last_indexed | 2024-04-10T15:34:05Z |
| publishDate | 2023-02-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Physics |
| spelling | doaj.art-07feedbce21f43cf84175fe8753ad2ed2023-02-13T07:59:35ZengFrontiers Media S.A.Frontiers in Physics2296-424X2023-02-011110.3389/fphy.2023.11031591103159Effects of ionosphere dispersion on wideband GNSS signalsDanning Zhao0Danning Zhao1Yu Lei2National Time Service Center, Chinese Academy of Sciences, Xi’an, ChinaSchool of Astronomy and Space Sciences, University of Chinese Academy of Sciences, Beijing, ChinaSchool of Computer Science and Technology, Xi’an University of Posts and Telecommunications, Xi’an, ChinaWideband GNSS signals suffer signal distortions such as waveform deformations and correlation peak reduction when traverse the ionosphere. Basing on the standard model of the ionosphere, we first demonstrate a modified ionosphere model to capture the ionosphere dispersion effects on wideband signals. We decompose the first-order ionosphere model into Taylor series. By using the first three terms of Taylor series, it is possible to account for all frequency components of wideband signals rather than treating them as single tone. We then make an analysis of the ionosphere dispersion effects on wideband GNSS signal tracking. It is revealed that the ionosphere dispersion degrades correlation peak results and shifts carrier-phase in the phase locked loop (PLL) output but dose not cause an additional delay for code measurements. Furthermore, we carry out a simulation for evaluating the ionosphere dispersion effects on tracking of various new generation wideband GNSS signals such as Galileo E5 AltBOC(15, 10) signals and BDS B3 BOC(15, 2.5) signals during ionosphere quietness and activities. The results show that the wider the bandwidth and the greater the total electron content (TEC) values, the more dramatic the ionosphere effects are. The Galileo E5 AltBOC(15, 10) signals are most affected among various wideband GNSS signals. For AltBOC(15, 10) signal tracking the correlation power loss is around 0.1 dB and the carrier-phase change is about 20° caused by the dispersion in quiet ionosphere case, and increases up to 0.35 dB and 33° during ionosphere activities, respectively.https://www.frontiersin.org/articles/10.3389/fphy.2023.1103159/fullionosphere dispersionwideband GNSS signalscorrelation power losscarrier-phase shiftsanalytic model |
| spellingShingle | Danning Zhao Danning Zhao Yu Lei Effects of ionosphere dispersion on wideband GNSS signals Frontiers in Physics ionosphere dispersion wideband GNSS signals correlation power loss carrier-phase shifts analytic model |
| title | Effects of ionosphere dispersion on wideband GNSS signals |
| title_full | Effects of ionosphere dispersion on wideband GNSS signals |
| title_fullStr | Effects of ionosphere dispersion on wideband GNSS signals |
| title_full_unstemmed | Effects of ionosphere dispersion on wideband GNSS signals |
| title_short | Effects of ionosphere dispersion on wideband GNSS signals |
| title_sort | effects of ionosphere dispersion on wideband gnss signals |
| topic | ionosphere dispersion wideband GNSS signals correlation power loss carrier-phase shifts analytic model |
| url | https://www.frontiersin.org/articles/10.3389/fphy.2023.1103159/full |
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