Codeless GPS positioning method and apparatus for such codeless positioning
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United States of America Patent
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Oct 13, 1998
Grant Date -
N/A
app pub date -
Mar 13, 1996
filing date -
Mar 13, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a method and an apparatus for codeless GPS positioning. According to the method, the unit (2) to be positioned receives GPS signals from several satellites (4), the codes of the GPS signals are removed, and the extracted carrier signals are transmitted out from the unit (2) to be positioned for the purpose of determining the position and/or velocity of said unit (2) to be positioned. According to the invention, the carrier signal frequencies are detected by means of a phase-locked loop and the thus detected signals are transmitted in digital format out from the unit (2) to be positioned for the purpose of further processing.
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