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SYSTEM AND METHOD OF UMTS UE LOCATION USING UPLINK DEDICATED PHYSICAL CONTROL CHANNEL AND DOWNLINK SYNCHRONIZATION CHANNEL

  • US 20100087204A1
  • Filed: 10/06/2008
  • Published: 04/08/2010
  • Est. Priority Date: 10/06/2008
  • Status: Active Grant
First Claim
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1. A method for estimating a location of a wireless device in a wireless communication system having a plurality of nodes and a plurality of location measurement units (“

  • LMU”

    ), the method comprising the steps of;

    (a) collecting a plurality of signal samples from a first wireless device and a second wireless device by one or more LMUs in a first search window;

    (b) determining a first time of arrival (“

    TOA”

    ) from the plural signal samples;

    (c) determining a second search window as a function of the first TOA;

    (d) determining a second TOA from the plural signal samples in the second search window;

    (e) determining a range estimate of the first wireless device; and

    (f) determining an estimated location of the first wireless device as a function of the first TOA, the second TOA, or the range estimate and second TOA.

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