Traffic surveillance radar using ranging for accurate target identification
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United States of America Patent
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Sep 28, 2004
Grant Date -
N/A
app pub date -
Nov 5, 2002
filing date -
Nov 5, 2002
priority date (Note) -
Expired
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Abstract
Disclosed is a Doppler shifted radar apparatus for correct target identification with respect to surveillance of moving vehicles. More particularly, an improved radar detection system using two or more continuously transmitted frequencies is used. The multiple frequencies are directed toward target vehicles whereby the phase difference of the two or more reflected Doppler signals is calculated and subsequently used to accurately determine a target range, thereby displaying the closest vehicle and closest vehicle speed. Vehicle speed is determined with use of the standard Doppler frequency shift. The next closest and/or next faster vehicle speed can also be easily determined.
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