Communications: directive radio wave systems and devices (e.g. – Return signal controls radar system – Receiver
Patent
1993-06-01
1994-06-28
Hellner, Mark
Communications: directive radio wave systems and devices (e.g.,
Return signal controls radar system
Receiver
342 96, 342101, 342195, G01S 1366
Patent
active
053250982
ABSTRACT:
A filtering system used in the tracking of a maneuvering target is provid A first filter estimates a partial system state at a time k in terms of target position measurements. A plurality of second filters are each provided with an acceleration model hypothesis from a prior time (k-1) free of position and velocity constraints. Each second filter generates an acceleration estimate at time k and a likelihood at time k that the acceleration model hypothesis is correct. The likelihoods from the second filters are summed to generate a probability vector at time k. A third interaction mixing filter generates the acceleration model hypotheses from prior time (k-1) using the probability vector from prior time (k-1) and the acceleration estimates from prior time (k-1). The third filter also provides an error covariance to the first filter to reflect the uncertainty in the acceleration model hypotheses from prior time (k-1). A probabilistic acceleration estimate for time k is formed as a sum of each of the acceleration estimates associated with each of the acceleration model hypotheses multiplied by a corresponding probability from the probability vector. The partial system state estimate and the probabilistic acceleration estimate are summed to generate a complete system state estimate at time k in terms of position, velocity and acceleration of the maneuvering target.
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Blair William D.
Rice Theodore R.
Watson Gregory A.
Hellner Mark
Lewis John D.
Shuster Jacob
The United States of America as represented by the Secretary of
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