Start Acceleration of the Space GPS Receiver
The cold start of the space GPS receiver, i.e. the start without any information about the receiver position, satellite constellation, and time, is complicated by a large Doppler shift of a navigation signal caused by the satellite movement on the Earth orbit. That increases about five times the sea...
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| Format: | Article |
| Language: | English |
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Polish Academy of Sciences
2020-12-01
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| Series: | International Journal of Electronics and Telecommunications |
| Subjects: | |
| Online Access: | https://journals.pan.pl/Content/117131/PDF/100_2473_Kovar_skl.pdf |
| _version_ | 1811314366492966912 |
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| author | Pavel Kovář |
| author_facet | Pavel Kovář |
| author_sort | Pavel Kovář |
| collection | DOAJ |
| description | The cold start of the space GPS receiver, i.e. the start without any information about the receiver position, satellite constellation, and time, is complicated by a large Doppler shift of a navigation signal caused by the satellite movement on the Earth orbit. That increases about five times the search space of the navigation signals compared to the standard GPS receiver. The paper investigates a method of the acceleration of the GPS receiver cold start time designed for the pico- and femto-satellites. The proposed method is based on a combination of the parallel search in Doppler frequency and PRN codes and the serial search in code phase delay. It can shorten the cold start time of the GPS receiver operating on LEO orbit from about 300 to 60 seconds while keeping the simplicity of FPGA signal processor and low power consumption. The developed algorithm was successfully implemented and tested in the piNAV GPS receiver. The energy required for the obtaining of the position fix was reduced five times from 36 on to 7.7 Joules. This improvement enables applications of such receiver for the position determination in smaller satellites like Pocket Cube or femto-satellites with a lower energy budget than the Cube Satellite. |
| first_indexed | 2024-04-13T11:11:36Z |
| format | Article |
| id | doaj.art-e31bb4b110ab455e8d1783eb335b670e |
| institution | Directory Open Access Journal |
| issn | 2081-8491 2300-1933 |
| language | English |
| last_indexed | 2024-04-13T11:11:36Z |
| publishDate | 2020-12-01 |
| publisher | Polish Academy of Sciences |
| record_format | Article |
| series | International Journal of Electronics and Telecommunications |
| spelling | doaj.art-e31bb4b110ab455e8d1783eb335b670e2022-12-22T02:49:07ZengPolish Academy of SciencesInternational Journal of Electronics and Telecommunications2081-84912300-19332020-12-01vol. 66No 4745752https://doi.org/10.24425/ijet.2020.134036Start Acceleration of the Space GPS ReceiverPavel KovářThe cold start of the space GPS receiver, i.e. the start without any information about the receiver position, satellite constellation, and time, is complicated by a large Doppler shift of a navigation signal caused by the satellite movement on the Earth orbit. That increases about five times the search space of the navigation signals compared to the standard GPS receiver. The paper investigates a method of the acceleration of the GPS receiver cold start time designed for the pico- and femto-satellites. The proposed method is based on a combination of the parallel search in Doppler frequency and PRN codes and the serial search in code phase delay. It can shorten the cold start time of the GPS receiver operating on LEO orbit from about 300 to 60 seconds while keeping the simplicity of FPGA signal processor and low power consumption. The developed algorithm was successfully implemented and tested in the piNAV GPS receiver. The energy required for the obtaining of the position fix was reduced five times from 36 on to 7.7 Joules. This improvement enables applications of such receiver for the position determination in smaller satellites like Pocket Cube or femto-satellites with a lower energy budget than the Cube Satellite.https://journals.pan.pl/Content/117131/PDF/100_2473_Kovar_skl.pdffpganavigationlow earth orbitacquisition accelerator |
| spellingShingle | Pavel Kovář Start Acceleration of the Space GPS Receiver International Journal of Electronics and Telecommunications fpga navigation low earth orbit acquisition accelerator |
| title | Start Acceleration of the Space GPS Receiver |
| title_full | Start Acceleration of the Space GPS Receiver |
| title_fullStr | Start Acceleration of the Space GPS Receiver |
| title_full_unstemmed | Start Acceleration of the Space GPS Receiver |
| title_short | Start Acceleration of the Space GPS Receiver |
| title_sort | start acceleration of the space gps receiver |
| topic | fpga navigation low earth orbit acquisition accelerator |
| url | https://journals.pan.pl/Content/117131/PDF/100_2473_Kovar_skl.pdf |
| work_keys_str_mv | AT pavelkovar startaccelerationofthespacegpsreceiver |