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Modeling of ultra‐wideband indoor channels with the modified leapfrog ADI‐FDTD method
Author(s) -
Zhai MengLin,
Yin WenYan,
Chen Zhizhang David,
Nie Hong,
Wang XiangHua
Publication year - 2014
Publication title -
international journal of numerical modelling: electronic networks, devices and fields
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.249
H-Index - 30
eISSN - 1099-1204
pISSN - 0894-3370
DOI - 10.1002/jnm.1983
Subject(s) - finite difference time domain method , ultra wideband , lossy compression , computer science , time domain , channel (broadcasting) , power (physics) , wireless , computational complexity theory , algorithm , exponent , delay spread , electronic engineering , wideband , path loss , telecommunications , fading , engineering , physics , optics , linguistics , philosophy , quantum mechanics , artificial intelligence , computer vision
SUMMARY Full‐wave time‐domain electromagnetic methods are usually effective in rigorously modeling and evaluating ultra‐wideband (UWB) wireless channels. However, their computational expenditures are expensive, when they are used to deal with electrically large‐size problems consisting of fine structures. In order to reduce computational time, the unconditionally stable leapfrog alternating‐direction implicit finite‐difference time‐domain (leapfrog ADI‐FDTD) method has been proposed recently. In this paper, the leapfrog ADI‐FDTD algorithm is developed for simulating lossy objects, such as office walls, floors, and ceilings, for UWB communication channel characterization. It leads to effective UWB channel characterization with power‐decay time constant, path loss exponent, and probability distribution of power gain. In comparison with the conventional FDTD, the proposed method can achieve 60% saving in computational time while retaining good accuracy. Copyright © 2014 John Wiley & Sons, Ltd.