EP0408237A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Doppler control channel for a radar
Assignee: Radar Control Systems Corp
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Filing: 1990-07-03
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Granted: —
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Expires: 2010-07-03
Abstract
Abstract A doppler control circuit for a CW or pulse Doppler Radar system for monitoring not only the phase shift between echo signals from several targets but also the amplitude difference between the several targets and to further provide a phase lock loop which tunes the radar to a particular target among one or more targets from which echo signals return. The circuit of this invention can be used in state of the art CW or Pulse Doppler type radar systems. <IMAGE>
Inventors
- 👤 Jimmie Asbury
- 👤 John W. Davis
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 08:20
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S13/00; G01S13/88; G01S13/93; G01S13/931; G01S13/02; G01S13/50; G01S13/52; G01S13/56; G01S13/66; G01S13/70; G01S13/72; G01S13/723; G01S13/726
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
62 words
In a control circuit for a CW or Pulse Doppler Radar Having a transmitter, an antenna and a receiver for transmitting a signal and receiving back echo signals when one or more targets are in the path of the radiated signal, first means for selecting one of a plurality of targets and for monitoring the return echo signal from said one target.
Claim 2
Dependent Claim
62 words
In a control circuit for a CW or Pulse Doppler Radar Having a transmitter, an antenna and a receiver for transmitting a signal and receiving back echo signals when one or more targets are in the path of the radiated signal, first means for selecting one of a plurality of targets and for monitoring the return echo signal from said one target.
Claim 3
Dependent Claim
35 words
The circuit as defined in claim 1 additionally comprising means for locking onto said echo signal and maintaining that locked condition until a new echo signal of greater prominence is selected by said first means.
Claim 4
Dependent Claim
24 words
The circuit defined in claim 2 wherein said first means will monitor said new echo signal until replaced by another more prominent echo signal.
Claim 5
Dependent Claim
19 words
The circuit defined in claim 1 additionally comprising circuit means for indicating that a target has not been selected.
Claim 6
Dependent Claim
22 words
The invention as defined in claim 1 additionally comprising circuit means for excluding all echo signals except that of said one target.
Claim 7
Dependent Claim
21 words
The circuit defined in claim 3 additionally comprising circuit means for excluding all echo signals except that of said one target.
Claim 8
Dependent Claim
21 words
The circuit defined in claim 1 wherein said first means selects the target which produces the echo signal of highest amplitude.
Claim 9
Dependent Claim
26 words
The circuit defined in claim 1 including circuits for measuring doppler frequency of said one target at different times for determining range to said one target.
Claim 10
Dependent Claim
17 words
The circuit defined in claim 8 including a circuit for determining the direction of said one target.
Claim 11
Dependent Claim
24 words
The circuit defined in claim 1 further including a circuit for emphasizing or deemphasizing echo signals from certain targets depending on the relative velocities.
Claim 12
Dependent Claim
24 words
The circuit defined in claim 3 wherein said first means includes a phase lock loop for maintaining an accurate lock on said one target.
Claim 13
Dependent Claim
76 words
In a vehicle collision avoidance system using CW or pulse Doppler radar comprising an antenna for transmitting a signal to targets in the path of the vehicle, a receiver for receiving echo signals from the targets, first and second range circuits for measuring Doppler frequencies of echo signals from a target at different intervals of preselected duration for determining the range to the target, and means for excluding from measurement targets beyond a preselected range limit.
Claim 14
Dependent Claim
76 words
In a vehicle collision avoidance system using CW or pulse Doppler radar comprising an antenna for transmitting a signal to targets in the path of the vehicle, a receiver for receiving echo signals from the targets, first and second range circuits for measuring Doppler frequencies of echo signals from a target at different intervals of preselected duration for determining the range to the target, and means for excluding from measurement targets beyond a preselected range limit.
Claim 15
Dependent Claim
19 words
In the system of claim 12 a circuit for selecting a target to be monitored within said range limit.
Claim 16
Dependent Claim
26 words
The system defined in claim 12 wherein said range limit is a multiple of one hundred forty feet up to a maximum of one thousand feet.
Claim 17
Independent Claim
74 words
A method of monitoring the range of a plurality of targets in the path of a moving vehicle equipped with an antenna for transmitting a CW or pulse Doppler radar signal and a receiver for receiving the echo signal from the targets, the method comprising the steps of selecting the target that is most prominent, and monitoring the echo signals from said selected target to the exclusion of the echo signals from other targets.
Claim 18
Independent Claim
74 words
A method of monitoring the range of a plurality of targets in the path of a moving vehicle equipped with an antenna for transmitting a CW or pulse Doppler radar signal and a receiver for receiving the echo signal from the targets, the method comprising the steps of selecting the target that is most prominent, and monitoring the echo signals from said selected target to the exclusion of the echo signals from other targets.
Claim 19
Dependent Claim
24 words
The method defined in claim 15 including the step of monitoring the echo signal of a second new target while excluding prior selected target.
Claim 20
Dependent Claim
24 words
The method defined in claim 15 including the steps of measuring the Doppler frequencies of said target at different time intervals of preselected durations.
References Cited (Backward Citations)
No citation records indexed.
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