Method and system for estimating movement speed of mobile unit
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United States of America Patent
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Apr 12, 2005
Grant Date -
Jan 29, 2004
app pub date -
Jul 9, 2003
filing date -
Jul 25, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention is related to a method for estimating a movement speed of a mobile unit in a mobile radio communication system. First, the present invention receives a first signal from the mobile unit. Then, the system calculates an envelope of the first signal and obtains a second signal by squaring the envelope. Next, the system obtains a third signal by multiplying the second signal by a modulated carrier, the carrier including a carrier frequency. According to the third signal, the present invention estimates the movement speed of the mobile unit.
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