Measuring positions

Communications: directive radio wave systems and devices (e.g. – Directive – Beacon or receiver

Reexamination Certificate

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Reexamination Certificate

active

08040279

ABSTRACT:
Techniques, systems and computer readable medium are disclosed for measuring a position of an object device. A position measuring apparatus includes a receiving unit designed to receive a signal transmitted from an object device for position measurement. The position measuring apparatus also includes a position computing unit designed to compute a position of the object device by applying Angle Of Arrival (AOA) and Time Of Arrival (TOA) techniques using the received signal. The position measuring apparatus also includes a medium channel estimating unit designed to estimate a channel of a medium, through which the received signal penetrates on a transmission path, using the received signal. The position measuring apparatus also includes a position correcting unit configured to compute a delay time caused by the received signal penetrating the medium using the estimated medium channel and correcting the position of the object device computed by the position computing unit using the delay time.

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European Search Report dated Nov. 26, 2008 for European Application No. 08013116.2 (7 pages).
Jo, Y.-H., et al., “Accuracy Enhancement for UWB Indoor Positioning Using Ray Tracing,” IEEE/ION Position, Location, and Navigation Symposium, pp. 565-568, Apr. 2006.
Wu, S., et al., “NLOS Error Mitigation for UWB Ranging in Dense Multipath Environments,” IEEE Wireless Communications and Networking Conference (WCNC 2007), pp. 1567-1572, Mar. 2007.

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