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Energy Efficient GPS Acquisition with Sparse-GPS
RISE, Swedish ICT, SICS. Indian Institute of Science, India.
CSIRO, Australia.
Microsoft, USA.
Microsoft, USA.
Show others and affiliations
2014 (English)Conference paper, Published paper (Refereed)
Abstract [en]

Following rising demands in positioning with GPS, low-cost receivers are becoming widely available; but their energy demands are still too high. For energy efficient GPS sensing in delay-tolerant applications, the possibility of offloading a few milliseconds of raw signal samples and leveraging the greater processing power of the cloud for obtaining a position fix is being actively investigated. In an attempt to reduce the energy cost of this data offloading operation, we propose Sparse-GPS1: a new computing framework for GPS acquisition via sparse approximation. Within the framework, GPS signals can be efficiently compressed by random ensembles. The sparse acquisition information, pertaining to the visible satellites that are embedded within these limited measurements, can subsequently be recovered by our proposed representation dictionary. By extensive empirical evaluations, we demonstrate the acquisition quality and energy gains of Sparse-GPS. We show that it is twice as energy efficient than offloading uncompressed data, and has 5-10 times lower energy costs than standalone GPS; with a median positioning accuracy of 40m.

Place, publisher, year, edition, pages
2014, 9. p. 155-166
National Category
Computer and Information Sciences
Identifiers
URN: urn:nbn:se:ri:diva-24159DOI: 10.1109/IPSN.2014.6846749Scopus ID: 2-s2.0-84904652713OAI: oai:DiVA.org:ri-24159DiVA, id: diva2:1043238
Conference
International Conference on Information Processing in Sensor Networks (IPSN)
Projects
PromosAvailable from: 2016-10-31 Created: 2016-10-31 Last updated: 2019-08-12Bibliographically approved

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Voigt, Thiemo

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CiteExportLink to record
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Citation style
  • apa
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Output format
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