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Accession Number
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ADA564383
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Title
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Toward an Integrated Framwork for Data-Efficient Parametric Adaptive Detection.
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Publication Date
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Feb 2012
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Media Count
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47p
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Personal Author
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H. Li
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Abstract
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The conjugate-gradient (CG) algorithm is investigated for reduced- rank STAP detection. A family of CG matched filter (CG-MF) is developed by using the k-th iteration of the CG in solving the Wiener-Hopf equation. The performance the CG-MF detectors is examined for two cases. The first involves an arbitrary covariance matrix. It is shown that each CG-MF detector 1) yields the highest output SINR and smallest MSE among all linear solutions in the Krylov subspace; and 2) is CFAR with non-decreasing detection probability as k increases. The second is a structured case frequently encountered in practice, where the covariance matrix contains a rank-r component due to dominant interference sources, a scaled identity due to the presence of white noise, and a perturbation component containing the residual interference and/or due to the estimation error. It is shown via a perturbation analysis that the (r+1)-st CG- MF detector achieves an output SINR nearly identical to that of the optimum MF detector which requires full iterations of the CG algorithm. Finally, the CG algorithm is used to solve a linear prediction problem in the parametric adaptive matched filter (PAMF). It is shown that the PAMF can be casted within the framework of reduced-rank STAP detection.
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Keywords
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Adaptive filters
Algorithms
Cfar(Constant false-alarm rate)
Covariance
Detectors
Errors
Estimates
Interference
Iterations
Linear systems
Linearity
Matched filters
Matrices(Mathematics)
Optimization
Output
Parametric analysis
Perturbations
Predictions
Residuals
Sinr(Signal-to-interference- and-noise ratio)
Solutions(General)
Sources
Stap(Space-time adaptive processing)
White noise
Yield
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Source Agency
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Non Paid ADAS
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NTIS Subject Category
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72B - Algebra, Analysis, Geometry, & Mathematical Logic
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Corporate Author
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Stevens Inst. of Tech., Hoboken, NJ.
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Document Type
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Technical report
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Title Note
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Final rept. 15 Apr 2009-30 Nov 2011.
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NTIS Issue Number
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1303
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Contract Number
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FA9550-09-1-0310
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