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
Method and apparatus for optimizing paging in a communication network
Method for processing an algae medium containing algae microorganisms to produce algal oil and by-products
Medical injector
Sensor chip, sensor cartridge, and analysis apparatus
Wideband multi-channel receiver with fixed-frequency notch filter for interference rejection
Paging of a user equipment (UE) within a wireless communications system
Portable hand-held multi-function device for storing, managing and combining rewards
  Randomly Featured Patents
Geranium plant named `Crystal Lake`
Portable type information apparatus having a first housing with a display portion and a second housing movable to cover the first housing with a key in one, extending into a recess of the othe
Retaining/fixing device
Semiconductor memory device with a voltage down converter stably generating an internal down-converted voltage
Servo motor driven fill system
Method of making vinyl trimmings for leather upholstery
Yarn feeder of weft knitting machine
Centralizer for internal pipe inspection device
Animal feeder
Compound oxidized styrylphosphine