Communications: directive radio wave systems and devices (e.g. – Determining distance
Reexamination Certificate
2011-08-02
2011-08-02
Sotomayor, John B (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Determining distance
C342S134000, C342S145000, C342S189000, C455S114300, C375S346000
Reexamination Certificate
active
07990310
ABSTRACT:
Disclosed herein is an Ultra-WideBand (UWB) ranging method using a narrowband interference suppression waveform. A transmission signal is transmitted to a target object. The transmission signal, reflected from the target object, is received. A template signal is generated by combining the narrowband interference suppression waveform and a channel estimation signal together. A correlation output signal is generated by convoluting the template signal and the received signal. A distance is calculated using a time delay when the correlation output signal has the maximum value thereof. The narrowband interference suppression waveform is any one of two waveforms that are expressed by the following Equation:in-line-formulae description="In-line Formulae" end="lead"?wr1(t)=g(t−δ1/2)+g(t+δ1/2)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?wr2(t)=g(t−δ2/2)−g(t+δ2/2)in-line-formulae description="In-line Formulae" end="tail"?where g(t) is a basic UWB pulse waveform, δ1=(N+1/2)f1, δ2=(N)/f1, N is an integer, and fiis the center frequency of a narrowband interference signal.
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Kang Woo-shik
Kwak Kyoung Seop
Zhang Weihua
H.C. Park & Associates PLC
Inha-Industry Partnership Institute
Samsung Electronics Co,. Ltd.
Sotomayor John B
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