A two-step time of arrival estimation algorithm for impulse radio ultra wideband systems

Sinan Gezici, Zafer Sahinoglu, Andreas F. Molisch, Hisashi Kobayashi, H. Vincent Poor

Research output: Chapter in Book/Report/Conference proceedingConference contribution

40 Scopus citations

Abstract

High time resolution of ultra wideband (UWB) signals facilitates very precise positioning capabilities based on time-of-arrival (TOA) measurements. Although the theoretical lower bound for TOA estimation can be achieved by the maximum likelihood principle, it is impractical due to the need for extremely high-rate sampling and the presence of large number of multipath components. On the other hand, the conventional correlation-based algorithm, which serially searches possible signal delays, takes a very long time to estimate the TOA of a received UWB signal. Moreover, the first signal path does not always have the strongest correlation output. Therefore, first path detection algorithms need to be considered. In this paper, a data-aided two-step TOA estimation algorithm is proposed. In order to speed up the estimation process, the first step estimates the rough TOA of the received signal based on received signal energy. Then, in the second step, the arrival time of the first signal path is estimated by considering a hypothesis testing approach. The proposed scheme uses low-rate correlation outputs, and is able to perform accurate TOA estimation in reasonable time intervals. The simulation results are presented to analyze the performance of the estimator.

Original languageEnglish (US)
Title of host publication13th European Signal Processing Conference, EUSIPCO 2005
StatePublished - Dec 1 2005
Event13th European Signal Processing Conference, EUSIPCO 2005 - Antalya, Turkey
Duration: Sep 4 2005Sep 8 2005

Publication series

Name13th European Signal Processing Conference, EUSIPCO 2005

Other

Other13th European Signal Processing Conference, EUSIPCO 2005
CountryTurkey
CityAntalya
Period9/4/059/8/05

All Science Journal Classification (ASJC) codes

  • Signal Processing

Keywords

  • Impulse radio (IR)
  • Method of moments (MM)
  • Statistical change detection
  • Time of arrival (TOA) estimation
  • Ultra-wideband (UWB)

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