NDLI: Maximum Likelihood time of arrival estimation for ultrawideband signals

Content Provider	IEEE Xplore Digital Library
Author	Ayadi, J. Hai Zhan Farserotu, J.
Copyright Year	2007
Description	Author affiliation: Centre Suisse d'Electron. et de Microtech. S.A., Neuchatel (Ayadi, J.; Hai Zhan; Farserotu, J.)
Abstract	In this contribution, we investigate maximum likelihood (ML) techniques for the estimation of time of arrival (ToA) for ultrawideband (UWB) propagation signals. Using the same methodology as [1], which was introduced for the multichannel estimation, we derive the ML criteria for the UWB ToA parameters estimation and we apply a denoising frequency-domain procedure so that the ML cost function becomes asymptotically noiseless. We show how the pseudo-quadratic ML (PQML), which is naturally asymptotically denoised, can be applied in the case of UWB time delays estimation and prove its convergence to the ML minimizer. Since the evaluation of the first time delay estimate can be converted to a distance estimate, the proposed method can be used for UWB ranging purposes and its optimal performance will hence follow for the UWB ranging accuracy. Simulation results are presented to demonstrate the good performance of the proposed techniques.
Starting Page	1
Ending Page	4
File Size	351849
Page Count	4
File Format	PDF
ISBN	9781424407781
DOI	10.1109/ISSPA.2007.4555562
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-02-12
Publisher Place	United Arab Emirates
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Maximum likelihood estimation Time of arrival estimation Ultra wideband technology Delay estimation Delay effects Frequency estimation Parameter estimation Noise reduction Cost function Convergence
Content Type	Text
Resource Type	Article

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