Hummingbird: An Energy-Efficient GPS Receiver for Small Satellites.
Global positioning system (GPS) is the most widely adopted localization technique for satellites in low earth orbits (LEOs). To enable many state-of-the-art applications on satellites, the exact position of the satellites is necessary. With the increasing demand for small satellites, the need for a...
| Publicado en: | Communications of the ACM Vol. 65; no. 11; pp. 133 - 141 |
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| Autores principales: | , , , , |
| Formato: | Artículo |
| Publicado: |
Association for Computing Machinery
Nov2022
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| Materias: | |
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=hlh&AN=159802834&site=ehost-live header: @attributes: shortDbName: hlh uiTerm: 159802834 longDbName: Humanities International Complete uiTag: AN controlInfo: bkinfo: jinfo: jid: 00010782 ACM jtl: Communications of the ACM issn: 00010782 maglogo: N pubinfo: dt: Nov2022 vid: 65 iid: 11 pid: 68 pub: Association for Computing Machinery artinfo: ui: 159802834 10.1145/3559770 ppf: 133 ppct: 8 formats: tig: atl: Hummingbird: An Energy-Efficient GPS Receiver for Small Satellites. aug: au: Narayana, Sujay Prasad, R. Venkatesha Rao, Vijay S. Mottola, Luca Prabhakar, T. V. affil: Delft University of Technology, The Netherlands. Politecnico di Milano, Italy. Indian Institute of Science, Bangalore, India. su: GPS receivers Microspacecraft Electronic equipment on artificial satellites Low earth orbit satellites Energy consumption CubeSats (Artificial satellites) Energy management sug: subj: GPS receivers Microspacecraft Electronic equipment on artificial satellites Low earth orbit satellites Energy consumption CubeSats (Artificial satellites) Energy management ab: Global positioning system (GPS) is the most widely adopted localization technique for satellites in low earth orbits (LEOs). To enable many state-of-the-art applications on satellites, the exact position of the satellites is necessary. With the increasing demand for small satellites, the need for a low-power GPS for satellites is also increasing. However, building low-power GPS receivers for small satellites poses significant challenges, mainly due to the high speeds (∼7.8 km/s) of satellites and low available energy. While duty cycling the receiver is a possible solution, the high relative Doppler shift among the GPS satellites and the small satellite contributes to an increase in Time to First Fix (TTFF), which negatively impacts energy consumption. Further, if the satellite tumbles, the GPS receiver may not be able to receive signals properly from the GPS satellites, thus leading to an even longer TTFF. In the worst case, the situation may result in no GPS fix due to disorientation of the receiver antenna. In this work, we elucidate the design of a low-cost, low-power GPS receiver for small satellites. We also propose an energy optimization algorithm to improve the TTFF. With the extensive evaluation of our GPS receiver on an operational nanosatellite, we show that up to 96.16% of energy savings can be achieved using our algorithm without significantly compromising (∼10 m) the positioning accuracy. pubtype: Periodical doctype: Article src: R language: English refInfo: copyright: @attributes: flag: Y dt: @attributes: year: 2022 holdings: @attributes: islocal: N |
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