Multi-stage maximum likelihood target estimator

Details Multi-stage maximum likelihood target estimator Multi-stage maximum likelihood target estimator

2007-09-04

2007-09-04

Pihulic, Dan (Department: 3662)

Communications, electrical: acoustic wave systems and devices

Distance or direction finding

C342S195000

Reexamination Certificate

active

11398732

ABSTRACT:
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 stages3and4. 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.

REFERENCES:
patent: 4561076 (1985-12-01), Gritsch
patent: 4831602 (1989-05-01), Kroenert et al.
patent: 5155706 (1992-10-01), Haley et al.
patent: 5181254 (1993-01-01), Schweizer et al.
patent: 5187689 (1993-02-01), Florent
patent: 5214744 (1993-05-01), Schweizer et al.
patent: 5315562 (1994-05-01), Bradley et al.
patent: 5531117 (1996-07-01), Fortes
patent: 5537119 (1996-07-01), Poore
patent: 5587969 (1996-12-01), Kroemer et al.
patent: 5960097 (1999-09-01), Pfeiffer et al.
patent: 2004/0006424 (2004-01-01), Joyce et al.
patent: 2005/0041102 (2005-02-01), Bongiovanni et al.
patent: 2005/0280571 (2005-12-01), Abatzoglou et al.

Affiliated with

Also associated with

Rating

Multi-stage maximum likelihood target estimator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multi-stage maximum likelihood target estimator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-stage maximum likelihood target estimator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3748267