Communications: directive radio wave systems and devices (e.g. – Return signal controls radar system – Receiver
Reexamination Certificate
2006-05-16
2006-05-16
Gregory, Bernarr E. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Return signal controls radar system
Receiver
C342S089000, C342S094000, C342S159000, C342S160000, C342S163000, C342S175000, C342S195000
Reexamination Certificate
active
07046188
ABSTRACT:
Systems and methods of tracking a beam-aspect target are provided. In embodiments, a target is tracked with a Kalman filter while detections are received. After a detection is missed, the Kalman filter may be concurrently propagated with a blind-zone particle filter until a probability that the target is in a blind zone exceeds a threshold. When the probability exceeds the threshold, the Kalman filter may refrain from further propagating. After a gated detection is received, the blind-zone particle filter and an unrestricted-zone particle filter may be concurrently propagated while a probability that the target is in an unrestricted zone exceeds a threshold. The system may return to tracking with the Kalman filter when a covariance of the unrestricted-zone particle filter falls below a predetermined covariance.
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Samuel Alphonso A.
Schmitt Harry A.
Waagen Donald E.
Zaugg David A.
Alkov Leonard A.
Finn Thomas J.
Gregory Bernarr E.
Raytheon Company
Vick Karl A.
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