Abstract
A high-resolution time-of-arrival (ToA) estimation algorithm is applied to an IEEE 802.15.3c compatible signal package. The high speed multi-carrier mode of this 60 GHz super-Gbit/s wireless standard is promising for ToA due to its high bandwidth spec. The suitability of this multi-carrier mode for ToA purposes is first verified in a theoretical derivation. The ToA estimation algorithm itself consists of two estimation steps. The first, a coarse step, is based on an auto correlation operation. After this coarse step, a ToA refinement is performed on 10 OFDM payload packages. The method is based on the modified-least-squares-Prony method, a high resolution estimation technique, enabling a higher precision for the ToA estimate than is determined by the sampling period of the receiver. Thanks to the broadband spec of the 802.15.3c standard and the compactness of the algorithm, update rates of more than 200 kHz can be achieved. The algorithm enables tuning out frequency offset and channel multipath effects. cm-accuracy and precision is enabled at SNRs for distance values close to 10 m.
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Acknowledgments
The authors would like to thank the Flemish agency for Innovation by Science and Technology (IWT) (OmniTrack project) and the company ESSENSIUM NV for the funding. Moreover, they thank E. Van Lil, P. A. J. Nuyts, T. Ayhan and N. De Clercq for the interesting discussions.
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Redant, T., Dehaene, W. An MLS-Prony implementation for a cm-Precise Super 10 m range 802.15.3c-PHY 60 GHz positioning application. J Ambient Intell Human Comput 5, 623–634 (2014). https://doi.org/10.1007/s12652-013-0189-4
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DOI: https://doi.org/10.1007/s12652-013-0189-4