Gesture recognition device and method using radar
AssigneelUCF-HYU (Industry-University Cooperation Foundation Hanyang University)
InventorsSung Ho CHO, Faheem KHAN, Jeong Woo CHOI
Life of this patent
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Abstract
A gesture recognition device and method using radar are proposed. The gesture recognition device includes: a signal receiving unit for receiving a radar signal reflected by a gesture of a user; a clutter removing unit for removing clutter from the signal received by the signal receiving unit; and a signal magnitude variance acquiring unit for acquiring the variance of a signal magnitude from a reflection signal from which the clutter has been removed. The proposed device and method have an advantage of enabling a gesture to be recognized with performance that is robust to changes in distance and direction between a user and a radar sensor.
Claims15
A gesture recognition device using a radar, the gesture recognition device comprising:
- a signal receiver unit configured to receive radar signals reflected by a gesture of a user;
- a clutter remover unit configured to remove clutter from the signals received at the signal receiver unit;
- a signal intensity variance acquirer unit configured to acquire a variance of signal intensity values from the reflected signals having the clutter removed therefrom;
- a ToA variance acquirer unit configured to acquire ToA's (times of arrival) corresponding to maximum values of fast time signals forming the reflected signals having the clutter removed therefrom and configured to acquire a variance of the acquired ToA's corresponding to the maximum values;
- a frequency acquirer unit configured to compute a frequency of the reflected signals having the clutter removed therefrom;
- a reference database configured to store reference feature information of a predetermined plurality of reference gestures;
- and
- a gesture recognition unit configured to determine which reference gesture a gesture of the user corresponds to by using the signal intensity variance, the maximum value ToA variance, the frequency, and the reference feature information stored in the reference database.
A gesture recognition method using a radar, the gesture recognition method comprising:
- (a) receiving radar signals reflected by a gesture of a user;
- (b) removing clutter from the signals received at said step (a);
- (c) acquiring a signal intensity variance from the reflected signals having the clutter removed therefrom;
- (d) acquiring ToA's (times of arrival) corresponding to maximum values of fast time signals forming the reflected signals having the clutter removed therefrom and acquiring a maximum value ToA variance defined as a variance of the acquired ToA's corresponding to the maximum values;
- (e) computing and acquiring a frequency of the reflected signals having the clutter removed therefrom;
- and
- (f) determining which reference gesture a gesture of the user corresponds to by using reference feature information of a predetermined plurality of reference gestures and the signal intensity variance, the maximum value ToA variance, and the frequency.
Dependencies are inferred from the claim text.