DocumentCode :
2370534
Title :
High-resolution clutter-power estimation for range-dependence compensation in conformal-array STAP
Author :
Ries, P. ; Lapierre, F.D. ; Lesturgie, M. ; Verly, J.G.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Univ. of Liege, Liege
fYear :
2008
fDate :
21-23 May 2008
Firstpage :
1
Lastpage :
4
Abstract :
We consider space-time adaptive processing (STAP) when the radar returns are recorded by a conformal antenna array (CAA). The statistics of the secondary data snapshots used to estimate the optimum weight vector are not identically distributed with respect to range, thus preventing the STAP processor from achieving its optimum performance. The compensation of the range dependence requires the precise knowledge of the clutter power contained in the secondary data. We propose anew MVDR-based clutter power estimator applied to temporally-smoothed secondary data to obtain an accurate estimate of the expected clutter power This estimate allows one to perform an accurate range-dependence compensation leading to a valid estimate of the clutter covariance matrix. End-to-end performance analysis in terms of signal to inference plus-noise ratio loss shows promizing performance.
Keywords :
antenna arrays; conformal antennas; estimation theory; radar clutter; space-time adaptive processing; MVDR-based clutter power estimator; clutter covariance matrix; conformal antenna array; conformal-array STAP; high-resolution clutter-power estimation; minimum variance distortionless response beamformer; optimum weight vector; range-dependence compensation; signal to inference-plus-noise ratio loss; space-time adaptive processing; Adaptive arrays; Antenna arrays; Clutter; Computer aided analysis; Covariance matrix; Performance analysis; Performance loss; Radar antennas; Spaceborne radar; Statistical distributions;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Radar Symposium, 2008 International
Conference_Location :
Wroclaw
Print_ISBN :
978-83-7207-757-8
Type :
conf
DOI :
10.1109/IRS.2008.4585705
Filename :
4585705
Link To Document :
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