Peter A Decesare

US Patent:

50381458, Aug 6, 1991

Filed:

Nov 20, 1989

Appl. No.:

7/438117

Inventors:

Peter A. DeCesare - Columbia MD
Michael J. Hodges - Lithicum MD
David W. Goetze - Baltimore MD

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

G01S 728

US Classification:

342 93

Abstract:

A constant false alarm rate (CFAR) circuit uses three windows for calculating mean level thresholds. In addition to a lead window and a lag window each separated from a cell of interest by a predetermined number of cells, a straddle window is used which includes the cell of interest. Each of the lead, lag and straddle windows are subjected to editing to remove three adjacent cells including the cell with the highest power level. The remaining cells are used to calculate a mean level threshold for each of the three windows. The largest of the three mean level thresholds is used, unless it is derived from the straddle window and it is significantly larger than the largest of the mean level thresholds derived from the lead and lag windows. In addition, use of the mean level threshold derived from the straddle window may be excluded for range cells associated with one or more range and azimuth.

US Patent:

59493682, Sep 7, 1999

Filed:

Dec 31, 1997

Appl. No.:

9/001943

Inventors:

Peter A. DeCesare - Ellicott City MD

Assignee:

Northrop Grumman Corporation - Los Angeles CA

International Classification:

G01S 734

US Classification:

342 93

Abstract:

A false alarm rate is maintained at or below a desired rate over a fluctuating mean noise level for providing additional sensitivity and increased range performance in a constant false alarm rate (CFAR) circuit in a radar system by: utilizing a variable CFAR detection threshold level for distances out to the radar's horizon; and, for distances beyond the radar's horizon, utilizing a relatively low fixed CFAR detection threshold level in place of the variable CFAR detection threshold level when there are no environmental factors present that produce additional radar returns.

Address:

12705 Folly Quarter Rd, Ellicott City, MD 21042

VIN:

2HGFG12657H542506

Make:

Honda

Model:

Civic

Year:

2007