Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2007-04-10
2007-04-10
Nguyen, Lee (Department: 2618)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S041200, C342S458000
Reexamination Certificate
active
10633269
ABSTRACT:
An apparatus and associated methods to provide precision ranging measurements in an ultrawideband (UWB) wireless communication system are generally described. In this regard, according to one example embodiment, an innovative ranging agent is introduced that effectively computes one or more of the time of signal propagation, the difference in local clocks and frequency offsets to calculate an increasingly accurate estimate of the proximal distance between two or more devices in UWB communication.x.
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Xinrong Li et al: Indoor Geolocation Using OFDM Signals in Hiperlan/2 Wireless LAN's IEEE vol. 2, Sep. 18, 2000.
Porcino D et al: “Ultra-Wideband Radio Technology: Potential and Challenges Ahead” IEEE Communication S Magazine, IEEE Service Center, vol. 41 No. 7 Jul. 2003.
Adams J C et al: “Ultra Wideband for Navigation and Communications” IEEE vol. 2, Mar. 20, 2001.
PCT Search Report.
England David G.
Hoffman Jeffrey D.
Leeper David G.
Nguyen Lee
Proksch Michael A.
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