Simulation of the Doppler signals at 24GHz from a walking person

Conference: GeMiC 2009 - German Microwave Conference
03/16/2009 - 03/18/2009 at München, Germany

Proceedings: GeMiC 2009

Pages: 4Language: englishTyp: PDF

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Hornsteiner, C.; Detlefsen, J. (Technische Universität München, Lehrstuhl für Hochfrequenztechnik, Fachgebiet Hochfrequente Felder und Schaltungen, Arcisstr. 21, 80333 München, Germany)

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.