Ultrawideband pulse correlation and distance error estimation

RA Cepeda Lopez, MA Beach, JP McGeehan

Research output: Working paperWorking paper and Preprints

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Abstract

In a given number of wireless systems, and ultrawideband (UWB) in particular, a way to communicate between transceivers is by correlating received pulses with one or several reference-pulse templates. The reference template(s) aim to give a good representation of the transmitted signal. However, even for unscattered signals, resulting from line-of-sight (LOS) transmissions, radiated pulses may differ as a function of the antennas’ angle of departure/capture or may "look different" due to limited spatial resolution at the receiver. As these inaccuracies are often neglected and may have an impact on the robustness of a communication’s link, unscattered LOS UWB measurements, from 3.5 GHz to 10.5 GHz, are used in this paper to explore: (i) the effects of correlating received signals with different pulse templates as a result of distance changes between antennas (shorter than the spatial resolution of the system) and different angles of antenna radiation/capture; and (ii) the error in distance prediction from a system relaying on peak detection and limited by its spatial resolution. As a result, pulse correlation values were found to fluctuate from one and up to a value of 0.4 in some cases. Also, errors in distance estimation were characterised against different interpolation factors, from which modelling parameters are presented.
Original languageEnglish
PublisherCOST (European Cooperation in Science and Technology)
Pages14 p
Publication statusPublished - Jun 2010

Publication series

NameCOST 2100 TD(10)11006

Bibliographical note

Additional information: A document presented to the 11th Management Committee Meeting of COST2010 (European Cooperation in the Field of Scientific and Technical Research), held in Aalborg, Denmark, June 2nd - 4th, 2010.

Sponsorship: The authors gratefully acknowledge the directors of Toshiba Research Europe Limited, Telecommunications Research Laboratory, for their support and permission to publish this work.

Keywords

  • channel sounding
  • theory of propagation

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