NDLI: Determination and application of signal velocity for spherical wave UWB signals in FDTD

Content Provider	IEEE Xplore Digital Library
Author	Thiry, A. Costen, F. Brown, A.
Copyright Year	2006
Description	Author affiliation: Manchester Univ. (Thiry, A.; Costen, F.; Brown, A.)
Abstract	This paper proposes a numerical technique to calculate the local propagation velocity of a spherical wave UWB signal in a limited FDTD space. This method can calculate the velocity at any point to any propagation directions. Meaningful results can be obtained from the method using even a limited number of grid cells which can be accommodated by a single standard desktop machine. This velocity is a function of propagation distance and the pulse shape. As long as the significant evolution of pulse shape is present due to the numerical noise, the local signal velocity varies continually as the pulse propagates. Pulse shape, in other words the frequency range a pulse occupies, affects the propagation distance at which the pulse dispersion becomes mature. This paper makes a link between the pulse shape and observation area where the waveform evolution saturates. The obtained propagation speed can be used for the asymmetry assessment as is done with the phase velocity. An example of propagation speed used for another purpose is also presented
Sponsorship	Motorola Air Force Office of Sci. Res. ANSOFT
Starting Page	3805
Ending Page	3808
File Size	204576
Page Count	4
File Format	PDF
ISBN	1424401232
DOI	10.1109/APS.2006.1711452
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-07-09
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Finite difference methods Time domain analysis Pulse shaping methods Shape Signal analysis Transient analysis Working environment noise Narrowband Noise shaping Frequency
Content Type	Text
Resource Type	Article

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