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 predicting object properties and events using similarity-based information retrieval and modeling
Apparatus for transmitting and receiving data in a wireless communication system and method thereof
Proton conducting electrolytes with cross-linked copolymer additives for use in fuel cells
Communication system including a switching section for switching a network route, controlling method and storage medium
Method for forming pattern
Modular authoring and visualization of rules using trees
System for collecting computer application usage data of targeted application programs executed on a plurality of client devices
  Randomly Featured Patents
Driving simulator
Adjustable deckle
Ultra-wideband tunable filters based on multi-resolution band-selection
Potted insert for honeycomb panels
Parallel output buffers in memory circuits
Facsimile transmission/reception method and apparatus using a common bus
Crosslinkable polysilane compositions and cured products thereof
Energy efficient domestic refrigeration system
Process for preparing natural benzaldehyde and acetaldehyde, natural benzaldehyde and acetaldehyde compositions, products produced thereby and organoleptic utilities therefor