DocumentCode :
3162308
Title :
Simulation of the Doppler signals at 24 GHz from a walking person
Author :
Hornsteiner, C. ; Detlefsen, J.
Author_Institution :
Lehrstuhl fur Hochfrequenztech., Tech. Univ. Munchen, Munich
fYear :
2009
fDate :
16-18 March 2009
Firstpage :
1
Lastpage :
4
Abstract :
For the simulation of the Doppler signals the geometry of a walking person is determined for discretized time steps fulfilling the Nyquist theorem. For each time step a field simulation with the physical optics (PO) and the geometrical optics (GO) approximation is done. Both approaches are based on a neglect of multiple reflections on the scattering object. After simulation the time varying field is displayed in time-frequency domain. For the PO-approximation only the total scattered field can be evaluated. With GO-approximation the path for different scattering points can be extracted and evaluated individually. Although both approaches give comparable results, the extraction of scattering centers gives a much better insight to the physical phenomena of scattering in the high frequency case.
Keywords :
Doppler effect; Nyquist criterion; geometrical optics; physical optics; time-frequency analysis; Doppler signals; Nyquist theorem; discretized time steps; frequency 24 GHz; geometrical optics approximation; multiple reflections; physical optics approximation; scattering center extraction; scattering object; time varying field; time-frequency domain; walking person geometry; Biological system modeling; Electromagnetic scattering; Frequency; Geometrical optics; Humans; Legged locomotion; Optical scattering; Physical optics; Sampling methods; Solid modeling;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Microwave Conference, 2009 German
Conference_Location :
Munich
Print_ISBN :
978-3-9812668-0-1
Electronic_ISBN :
978-3-8007-3150-3
Type :
conf
DOI :
10.1109/GEMIC.2009.4815875
Filename :
4815875
Link To Document :
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