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 system for modeling a common-language speech recognition, by a computer, under the influence of a plurality of dialects
Methods and systems for dynamic spectrum arbitrage
Self-diagnostic method and system for implantable cardiac device
Radiation protective garment with forced ventilation and method
Color LED display device without color separation
Terminal device, system and computer readable medium
Method for controlling a motor
  Randomly Featured Patents
Service roaming system and method
Room lamp fixing structure
Charge control agent, manufacturing process therefor and toner
Method and apparatus for distributing messages to mobile recipients
Process for impregnating wood
Chemical and biological sensors, systems and methods based on radio frequency identification
Five burner gas cooktop with grates and central control knobs
Providing multiple levels of service for wireless communication devices communicating with a small coverage access point
Optical wavelength multiplex transmission method and optical dispersion compensation method
High frequency field-effect transistor