Extraction of Features Related to Human Gait Using a Continuous-Wave Radar

Conference: GeMIC 2008 - German Microwave Conference
03/10/2008 - 03/12/2008 at Hamburg-Harburg, Germany

Proceedings: GeMIC 2008

Pages: 3Language: 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)

Human gait analysis with radar techniques is of increasing interest in todays research for the discrimination between different moving objects. The use of a Continuous-Wave (CW) Radar allows a simple acquisition of velocity information. The short-time Fourier transform (STFT) of the radar signal is a representation of the signal in both time- and frequency domain. The display of the absolute value in logarithmic form, the so called spectrogram, can be used for the extraction of velocity data. The movement of the legs is a candidate for a feature evaluation. The varying velocity is expressed in a Fourier series whose coefficients can be used as features. These features offer the possibility to discriminate between different objects.