Vehicular traffic surveillance doppler radar system
DCFirst Claim
Patent Images
1. A vehicular traffic surveillance Doppler radar comprising:
- an antenna circuit portion configured to receive reflected modulated FM signals from a target;
a ranging circuit portion configured to perform a quadrature demodulation on the reflected modulated FM signals; and
the ranging circuit portion configured to determine, for the target, a range measurement based upon phase angle measurements derived therefrom.
1 Assignment
Litigations
0 Petitions
Accused Products
Abstract
A vehicular traffic surveillance Doppler radar system and method for use of the same are disclosed. In one embodiment, the system comprises a modulation circuit portion for generating modulated FM signals. An antenna circuit portion transmits the modulated FM signals to a target and receives the reflected modulated FM signals therefrom. A ranging circuit portion performs a quadrature demodulation on the reflected modulated FM signals and determines a range measurement based upon phase angle measurements derived therefrom.
66 Citations
13 Claims
-
1. A vehicular traffic surveillance Doppler radar comprising:
-
an antenna circuit portion configured to receive reflected modulated FM signals from a target; a ranging circuit portion configured to perform a quadrature demodulation on the reflected modulated FM signals; and the ranging circuit portion configured to determine, for the target, a range measurement based upon phase angle measurements derived therefrom. - View Dependent Claims (2)
-
-
3. A vehicular traffic surveillance Doppler radar for use in a multiple vehicle environment including a plurality of target vehicles, the vehicle traffic surveillance Doppler radar comprising:
-
a direction-sensing Doppler radar associated with a source vehicle; the Doppler radar configured to perform a quadrature demodulation on reflected modulated FM signals received from at least a portion of a plurality of target vehicles; the Doppler radar configured to determine a range measurement for the at least a portion of the plurality of target vehicles based upon phase angle measurements derived therefrom. - View Dependent Claims (4, 5, 6, 7, 8)
-
-
9. A method for operating a vehicular traffic surveillance Doppler radar, the method comprising:
-
receiving first reflected modulated FM signals at the Doppler radar from a first target; receiving second reflected modulated FM signals at the Doppler radar from a second target; transforming the received first and second reflected modulated FM signals to target spectrum; analyzing frequency signal differentials associated with the target spectrum to determine respective speeds of the first and second targets; and analyzing phase angle signal differentials associated with the target spectrum to determine respective ranges of the first and second targets. - View Dependent Claims (10, 11, 12, 13)
-
Specification