2 September 2004 Rank-deficient robust Capon filter-bank approach to complex spectral estimation
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We consider nonparametric complex spectral estimation using an adaptive filtering based approach where the finite impulse response (FIR) filter-bank is obtained via a rank-deficient robust Capon beamformer. We show that by allowing the sample covariance matrix to be rank-deficient, we can achieve much higher resolution than existing approaches, which is useful in many applications including radar target detection and feature extraction. Numerical examples are provided to demonstrate the performance of the new approach as compared to existing data-adaptive and data-independent FIR filtering based spectral estimation methods.
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Yanwei Wang, Yanwei Wang, Jian Li, Jian Li, Petre Stoica, Petre Stoica, "Rank-deficient robust Capon filter-bank approach to complex spectral estimation", Proc. SPIE 5427, Algorithms for Synthetic Aperture Radar Imagery XI, (2 September 2004); doi: 10.1117/12.541596; https://doi.org/10.1117/12.541596

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