Track filter bias estimation

U.S. Patent Number: 5313212

Abstract: A radar system including a Kalman filter that processes radar return signals to produces position, velocity, acceleration, gain and residual error output signals, and a post-processor that processes these signals in accordance with a track filter bias estimation procedure. The procedure computes bias estimates and revised position, velocity and acceleration output signals that are corrected for bias error. The revised output signals are coupled to the radar system to track a target. The track filter bias estimation method computes bias estimates in accordance with the relationship: ##EQU1## where Res, K.sub.1 /K.sub.2, R and T denote the residual, gains, range, and filter cycle time, respectively, and the tilde indicates a sample averaging. The present invention also provides for improved maneuver detection by implementing an acceleration estimation algorithm used to track a maneuvering target. The present invention is applicable in all fields and areas where estimation using Kalman filters is used.

Inventors: Ruzicka; George J. (Los Angeles, CA)

Assignee: Hughes Aircraft Company (Los Angeles, CA)

Application Number: 07/964,181

Issued: 1994-05-17

Expired: 2006-05-17

Classes: 342/101 ; 342/195; 342/95; 342/97

Field of search: 342/101,95,96,97,195

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