Systems and methods for 4-dimensional radar tracking
First Claim
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1. A system for four-dimensional radar tracking comprises:
- a transmitter that transmits a first probe signal;
a horizontal receiver array, comprising a first plurality of radar elements positioned along a first radar axis, that receives a first reflected probe signal in response to reflection of the first probe signal by a tracking target;
wherein the tracking target and the horizontal receiver array are connected by a target vector;
a vertical receiver array, comprising a second plurality of radar elements positioned along a second radar axis, the second radar axis not parallel to the first radar axis, that also receives the first reflected probe signal in response to reflection of the first probe signal by the tracking target; and
a signal processor, coupled to the horizontal and vertical receiver arrays, that calculates a four-dimensional tracking solution by;
detecting the tracking target;
calculating a target range;
calculating a target range rate;
performing ambiguous angle calculations for first and second target angles;
wherein the first target angle is between a first reference vector and a first projected target vector;
wherein the first projected target vector is the target vector projected into a first reference plane, the first reference plane containing both of the first radar axis and the first reference vector;
wherein the second target angle is between a second reference vector and a second projected target vector;
wherein the second projected target vector is the target vector projected into a second reference plane, the second reference plane containing both of the second radar axis and the second reference vector;
performing unambiguous angle calculations for the first and second target angles; and
calculating the four-dimensional tracking solution, including position and range-rate, from the target range, target range-rate, ambiguous angle calculations, and unambiguous angle calculations.
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Abstract
A method for four-dimensional radar tracking includes transmitting a first probe signal; receiving a first reflected probe signal at first and second radar arrays of the radar system; detecting a tracking target; calculating a target range; calculating a target range rate; performing ambiguous angle calculations for first and second target angles; performing unambiguous angle calculations for the first and second target angles; and calculating a four-dimensional tracking solution, including position and range-rate, from the target range, target range-rate, ambiguous angle calculations, and unambiguous angle calculations.
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Citations
19 Claims
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1. A system for four-dimensional radar tracking comprises:
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a transmitter that transmits a first probe signal; a horizontal receiver array, comprising a first plurality of radar elements positioned along a first radar axis, that receives a first reflected probe signal in response to reflection of the first probe signal by a tracking target;
wherein the tracking target and the horizontal receiver array are connected by a target vector;a vertical receiver array, comprising a second plurality of radar elements positioned along a second radar axis, the second radar axis not parallel to the first radar axis, that also receives the first reflected probe signal in response to reflection of the first probe signal by the tracking target; and a signal processor, coupled to the horizontal and vertical receiver arrays, that calculates a four-dimensional tracking solution by; detecting the tracking target; calculating a target range; calculating a target range rate; performing ambiguous angle calculations for first and second target angles;
wherein the first target angle is between a first reference vector and a first projected target vector;
wherein the first projected target vector is the target vector projected into a first reference plane, the first reference plane containing both of the first radar axis and the first reference vector;
wherein the second target angle is between a second reference vector and a second projected target vector;
wherein the second projected target vector is the target vector projected into a second reference plane, the second reference plane containing both of the second radar axis and the second reference vector;performing unambiguous angle calculations for the first and second target angles; and calculating the four-dimensional tracking solution, including position and range-rate, from the target range, target range-rate, ambiguous angle calculations, and unambiguous angle calculations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system for four-dimensional radar tracking comprises:
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a transmitter that transmits first and second probe signals simultaneously; a horizontal receiver array, comprising a first plurality of radar elements positioned along a first radar axis, that receives a first reflected probe signal in response to reflection of the first probe signal by a tracking target and a second reflected probe signal in response to reflection of the second probe signal by the tracking target;
wherein the tracking target and the horizontal receiver array are connected by a target vector;a vertical receiver array, comprising a second plurality of radar elements positioned along a second radar axis, the second radar axis not parallel to the first radar axis, that also receives the first reflected probe signal in response to reflection of the first probe signal by the tracking target and the second reflected probe signal in response to reflection of the second probe signal by the tracking target; and a signal processor, coupled to the horizontal and vertical receiver arrays, that calculates a four-dimensional tracking solution by; detecting the tracking target; calculating a target range; calculating a target range rate; performing ambiguous angle calculations for first and second target angles;
wherein the first target angle is between a first reference vector and a first projected target vector;
wherein the first projected target vector is the target vector projected into a first reference plane, the first reference plane containing both of the first radar axis and the first reference vector;
wherein the second target angle is between a second reference vector and a second projected target vector;
wherein the second projected target vector is the target vector projected into a second reference plane, the second reference plane containing both of the second radar axis and the second reference vector;performing unambiguous angle calculations for the first and second target angles; and calculating the four-dimensional tracking solution, including position and range-rate, from the target range, target range-rate, ambiguous angle calculations, and unambiguous angle calculations. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification