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Author Malik, W.Q. ♦ Stevens, C.J. ♦ Edwards, D.J.
Sponsorship IEEE Antennas and Propagation Society
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©1963
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics ♦ Electricity & electronics ♦ Technology ♦ Engineering & allied operations ♦ Applied physics
Subject Keyword Ultra wideband technology ♦ Ultra wideband antennas ♦ Antennas and propagation ♦ Directive antennas ♦ Frequency ♦ Bandwidth ♦ Dispersion ♦ Antenna measurements ♦ Distortion measurement ♦ Antenna arrays ♦ ultrawideband (UWB) ♦ Antenna ♦ array ♦ direction-of-arrival (DOA) estimation ♦ distortion ♦ sensor localization
Abstract 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.
Description Author affiliation :: Dept. of Brain & Cognitive Sci., Massachusetts Inst. of Technol., Cambridge, MA
ISSN 0018926X
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2008-07-01
Publisher Place U.S.A.
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Volume Number 56
Issue Number 7
Size (in Bytes) 2.06 MB
Page Count 8
Starting Page 1900
Ending Page 1907


Source: IEEE Xplore Digital Library