Abstract
A Two-Stage Hybrid algorithm offers significant improvement in the false alarm rate and detection performance of Space-Time Adaptive Processing in non-homogeneous environments for both radar and digital communications. The first stage analyzes data from a range cell of interest by direct data domain processing, suppressing discrete interferers within the range cell of interest. The second stage implements a purely statistical STAP algorithm, preferably an enhanced version of the Joint-Domain Localized ("JDL") statistical algorithm. For radar this second stage estimates the interference within the range cell of interest from the surrounding range cells. For a communications system, the second stage estimates the covariance matrix of the interference from the entire data block. For both radar and communications, an adaptive filter that suppresses the interference is generated from the estimate by second-order statistics. The present invention is the first two-dimensional STAP technique; all prior-art is one-dimensional.
Document Type
Patent
Status
Issued
Issue Date
6-26-2001
Patent Number
US 6252540 B1 [6,252,540]
CPC Classification
G01S13/524
Application number
09/468044
Assignees
Government of the United States, as represented by the Secretary of the Air Force, Washington, DC (US)
Filing Date
12-21-1999
Recommended Citation
Hale, Todd B, Michael C. Wicks, and Raviraj S. Adve. Apparatus And Method For Two Stage Hybrid Space-time Adaptive Processing In Radar And Communication Systems. United States Patent 6252540, issued 26 June 2021. https://scholar.afit.edu/patents/55