TOA estimation for UWB through-wall application

  • Authors:

  • Ma Lin;Zhang Zhongzhao;Tan Xuezhi

  • Affiliations:

  • Harbin Institute of Technology, Science Park;Harbin Institute of Technology, Science Park;Harbin Institute of Technology, Science Park

  • Venue:
  • ICAIT '08 Proceedings of the 2008 International Conference on Advanced Infocomm Technology
  • Year:
  • 2008

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Abstract

The wall filter effect on the UWB through-wall impulse is investigated. The problem addressed is the TOA estimation error for the UWB indoor application. Simulation and analysis point out that it is advisable to employ the proper impulse to achieve the high time resolution rather than to employ the impulse as short as possible. The high time resolution and distortion by wall filter effect should be trade off and well considered when the impulse is chosen for the through-wall application. The shorter through-wall impulse it is, the greater distortion it suffers. For templates mismatching with the received signal, the receiver estimates the wrong TOA against the peak of the correlation. The proposed solution is to modify the template according to the application scenarios for different wall materials. Mathematical analysis is exploited to show the validity of this method.