Cognitive tracking radar
First Claim
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1. A method for operating a radar system for tracking a target, the radar system having a transmitter and a receiver, the method comprising:
- a) determining an immediately preceding state of said target;
b) based on said immediately preceding state, predicting an expected state of said target;
c) based on said expected state of said target, determining parameters for use in illuminating said target;
d) using said transmitter to illuminate said target based on said parameters;
e) receiving radiation reflected from said target;
f) determining a current state of said target based on radiation received in step e)g) using said current state as said immediately preceding state, repeating steps b)-g).
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Abstract
Methods and systems relating to a cognitive tracking radar system. A radar system determines an immediately preceding state of a target being tracked. Based on this immediately preceding state, the system determines parameters and waveforms which may be used to better illuminate the target. These parameters and waveforms are then used when illuminating the target. The state of the target is then measured from the reflected returns of the illuminating waveform. The newly received measurements then form the basis for the new state of the target and the procedure is repeated.
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Citations
9 Claims
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1. A method for operating a radar system for tracking a target, the radar system having a transmitter and a receiver, the method comprising:
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a) determining an immediately preceding state of said target; b) based on said immediately preceding state, predicting an expected state of said target; c) based on said expected state of said target, determining parameters for use in illuminating said target; d) using said transmitter to illuminate said target based on said parameters; e) receiving radiation reflected from said target; f) determining a current state of said target based on radiation received in step e) g) using said current state as said immediately preceding state, repeating steps b)-g). - View Dependent Claims (2, 3, 4, 5)
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6. A system for iteratively tracking a target, the system comprising:
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a transmitter for transmitting electromagnetic radiation to said target; a receiver for receiving reflected radiation from said target; processing means for receiving data related to said reflected radiation received by said receiver, said processing means determining parameters to be used by said transmitter when illuminating said target by transmitting said electromagnetic radiation; wherein said transmitter receives said parameters from said processing means, said parameters being determined by said processing means based on a predicted state of said target; said processing means determines said predicted state based on an immediately preceding state of said target as derived from said reflected radiation received by said receiver. - View Dependent Claims (7, 8)
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9. Computer readable medium having stored thereon computer readable instruction which, when executed, executes a method for approximating a discrete-time Bayesian filter estimation that has a time update and a measurement update, said time update being estimated by a method comprising:
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a) Factorize
Pk−
1|k−
1=Sk−
1|k−
1Sk−
1|k−
1Tusing an assumption that at time k that a posterior density function p(xk−
1|Dk−
1)=({circumflex over (x)}k−
1|k−
1,Pk−
1|k−
1) is knownb) Evaluate cubature points (i=1, 2, . . . , m)
Xi,k−
1|k−
1=Sk−
1|k−
1ξ
i+{circumflex over (x)}k−
1|k−
1where m=2n x .c) Evaluate propagated cubature points (i=1, 2, . . . , m)
Xi,k|k−
1*=f(Xi,k−
1|k−
1,uk−
1)d) Estimate a predicted state
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Specification