Ultrawideband antenna distortion compensation

The radiation characteristics of ultrawideband (UWB) antennas vary with frequency, introducing directionally asymmetric bandwidth reduction and waveform dispersion. In this paper, we develop a simple technique to alleviate the distortion due to nonisotropically dispersive antennas, and use indoor ch...

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Bibliographic Details
Main Authors: Malik, W, Stevens, C, Edwards, D
Format: Journal article
Language:English
Published: 2008
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author Malik, W
Stevens, C
Edwards, D
author_facet Malik, W
Stevens, C
Edwards, D
author_sort Malik, W
collection OXFORD
description The radiation characteristics of ultrawideband (UWB) antennas vary with frequency, introducing directionally asymmetric bandwidth reduction and waveform dispersion. In this paper, we develop a simple technique to alleviate the distortion due to nonisotropically dispersive antennas, and use indoor channel measurements to verify its performance. The approach is based on multipath direction estimation and therefore involves antenna arrays. We show that antenna distortion can enhance sensor localization ambiguity and introduce errors in its estimate. Antenna compensation mitigates this effect, significantly improving the location estimation accuracy. We further demonstrate that antenna compensation helps reduce the small-scale fading artifacts that arise due to the antennas, thus reducing the channel spatial variability and delay spread. Our technique can also aid empirical channel characterization by providing antenna-independent propagation data. © 2008 IEEE.
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spelling oxford-uuid:1b26aab8-f48d-4bb9-add8-641d57c663c72022-03-26T10:58:42ZUltrawideband antenna distortion compensationJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:1b26aab8-f48d-4bb9-add8-641d57c663c7EnglishSymplectic Elements at Oxford2008Malik, WStevens, CEdwards, DThe radiation characteristics of ultrawideband (UWB) antennas vary with frequency, introducing directionally asymmetric bandwidth reduction and waveform dispersion. In this paper, we develop a simple technique to alleviate the distortion due to nonisotropically dispersive antennas, and use indoor channel measurements to verify its performance. The approach is based on multipath direction estimation and therefore involves antenna arrays. We show that antenna distortion can enhance sensor localization ambiguity and introduce errors in its estimate. Antenna compensation mitigates this effect, significantly improving the location estimation accuracy. We further demonstrate that antenna compensation helps reduce the small-scale fading artifacts that arise due to the antennas, thus reducing the channel spatial variability and delay spread. Our technique can also aid empirical channel characterization by providing antenna-independent propagation data. © 2008 IEEE.
spellingShingle Malik, W
Stevens, C
Edwards, D
Ultrawideband antenna distortion compensation
title Ultrawideband antenna distortion compensation
title_full Ultrawideband antenna distortion compensation
title_fullStr Ultrawideband antenna distortion compensation
title_full_unstemmed Ultrawideband antenna distortion compensation
title_short Ultrawideband antenna distortion compensation
title_sort ultrawideband antenna distortion compensation
work_keys_str_mv AT malikw ultrawidebandantennadistortioncompensation
AT stevensc ultrawidebandantennadistortioncompensation
AT edwardsd ultrawidebandantennadistortioncompensation