Communications: directive radio wave systems and devices (e.g. – Return signal controls radar system – Receiver
Reexamination Certificate
2007-06-12
2009-12-01
Tarcza, Thomas H (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Return signal controls radar system
Receiver
C342S095000, C342S097000, C342S106000, C342S109000, C342S113000, C342S115000, C342S133000, C342S140000, C342S145000, C342S146000, C342S189000, C342S195000, C342S451000
Reexamination Certificate
active
07626534
ABSTRACT:
A target tracking method uses sensor(s) producing target signals subject to positional and/or angular bias, which are updated with sensor bias estimates to produce updated target-representative signals. Time propagation produces time-updated target states and sensor positional and angular biases. The Jacobian of the state dynamics of a target model produces the state transition matrix for extended Kalman filtering. Target state vector and bias covariances of the sensor are time propagated. The Kalman measurement residual is computed to produce state corrections, which are added to the time updated filter states to thereby produce (i) target state updates and (ii) sensor positional and angular bias updates. The covariance of a state vector comprising target states and sensor positional and angular biases is propagated, producing measurement updated state covariance including (i) target position and velocity measurement covariance updates and (ii) the sensor positional and angular bias measurement covariance updates.
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Boka Jeffrey B.
Mookerjee Purusottam
Patel Naresh R.
Duane Morrs LLP
Galt Cassi
Lockheed Martin Corporation
Tarcza Thomas H
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