Method and apparatus for locating a wireless user
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United States of America Patent
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Apr 10, 2012
Grant Date -
Sep 11, 2008
app pub date -
May 19, 2008
filing date -
Sep 6, 1994
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A plurality of antennas transmit a first spread spectrum signal having an associated code. The first spread spectrum signal is received at the wireless user. For each received first spread spectrum signal, a second spread spectrum signal is transmitted having an associated code having a same phase as that received first spread spectrum signal. The second spread spectrum signals are received at the plurality of antennas. A distance measurement is determined between each antenna and the wireless user based on in part a received timing of the second signals. The wireless user's location is determined based on in part the distance determinations.
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