Modeling of ultra-wideband indoor channels with the modified leapfrog ADI-FDTD method
Finite-difference time-domain (FDTD), Leapfrog alternating-direction implicit finite-difference time-domain (leapfrog ADI-FDTD), UWB wireless channel
International Journal of Numerical Modelling: Electronic Networks, Devices and Fields
Full-wave time-domain electromagnetic methods are usually effective in rigorously modeling and evaluating ultrawideband (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.
Original Publication Date
DOI of published version
Zhai, Meng Lin; Yin, Wen Yan; Chen, Zhizhang; Nie, Hong; and Wang, Xiang Hua, "Modeling of ultra-wideband indoor channels with the modified leapfrog ADI-FDTD method" (2015). Faculty Publications. 1339.