Title :
Simulation of UWB echoes from ground based on CPML-FDTD
Author :
Quanmin, Wang ; Bin, Chen ; Gang, Guo ; Kedi, Huang
Author_Institution :
Dept. of Mech. Eng. & Autom., Nat. Univ. of Defense Technol., Changsha, China
Abstract :
In designing some UWB-IR (ultra-wideband impulse radio) devices, the effects of ground echoes must be taken into consideration. The dispersion of soil and roughness of ground surface are significant factors in ground echoes calculation. FDTD (finite difference of time domain) algorithms applied in ground echo simulation at present have the problems of slow speed or large errors. By using multi-pole Debye model as soil dielectric coefficients, and CPML (convolutional perfectly matched layer) as absorption boundary condition, a CPML-FDTD algorithm is derived in multi-pole Debye media. Simulations are carried out under different conditions, and comparison with non-PML FDTD algorithm proves the validity and efficiency of the proposed algorithm.
Keywords :
boundary-value problems; echo suppression; finite difference time-domain analysis; ground penetrating radar; ultra wideband radar; CPML-FDTD algorithm; FDTD algorithms; UWB echoes; UWB-IR; absorption boundary condition; convolutional perfectly matched layer; finite difference of time domain algorithms; ground echo simulation; ground echoes; ground surface roughness; multipole Debye model; soil dielectric coefficients; soil dispersion; ultra-wideband impulse radio devices; Atmospheric modeling; Biological system modeling; Computational modeling; Dielectrics; Finite difference methods; Moisture; Remote sensing; FDTD; convolutional perfectly matched layer; ground echo; multi-pole Debye model; ultra-wideband;
Conference_Titel :
Computer Science and Information Technology (ICCSIT), 2010 3rd IEEE International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-5537-9
DOI :
10.1109/ICCSIT.2010.5564658
