Radio positioning of a mobile receiver using a virtual positioning reference
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United States of America Patent
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Feb 16, 2016
Grant Date -
Aug 2, 2012
app pub date -
Oct 4, 2010
filing date -
Oct 5, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
Methods and systems are disclosed for radio positioning of a mobile receiver using a virtual positioning reference established by logging a known position of the mobile receiver together with a local time at which a first instance of a predictably repeated code word is received by the mobile receiver from a terrestrial radio signal transmitter. During movement of the mobile receiver from the first known position to a second unknown position, a local clock is used to determine the time difference between when the virtual positioning reference is predicted to receive a second instance of the code word and when the mobile receiver actually receives the second instance of the code word.
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