Resources Contact Us Home
Multi-stage maximum likelihood target estimator

Image Number 3 for United States Patent #7266042.

A multi-stage maximum likelihood target estimator for use with radar and sonar systems is provided. The estimator is a software implemented algorithm having four computational stages. The first stage provides angle smoothing for data endpoints thereby reducing angle errors associated with tie-down times. The second stage performs a coarse grid search to obtain the initial approximate target state to be used as a starting point for stages 3 and 4. The third stage is an endpoint Gauss-Newton type maximum likelihood target estimate which determines target range along two time lines. The final refinement of the target state is obtained by the fourth stage which is a Cartesian coordinate maximum likelihood target estimate. The four-stage processing allows the use of target historic data while reducing processing time and computation power requirement.

  Recently Added Patents
Time sharing type autostereoscopic display apparatus and method for driving the same
Computerized information and display methods
Transparent conductive structure
Estrogen receptor ligands
Subpixel-based image down-sampling
Geographically self-labeling access points
Electrical terminal
  Randomly Featured Patents
Z-fold diaper fastener
Dynamically disabling speculative prefetch when high priority demand fetch opportunity use is high
Pill splitter with rotating bed
Industrial vacuum cleaner
Apparatus and method for characterizing an image system in lithography projection tool
Surge suppressor device
Method and apparatus for alignment, comparison & identification of characteristic tool marks, including ballistic signatures
Method to change the profiles of released membranes
Vacuum pressure regulator
Methods for extracting cereal .beta.-glucans