caa a22 4500 606205713 CHVBK 20210128101008.0 cr unu---uuuuu 210128e20150301xx s 000 0 eng 10.1007/s00034-014-9874-6 doi (NATIONALLICENCE)springer-10.1007/s00034-014-9874-6 Adaptive Clutter Nulling Approach for Heterogeneous Environments [Elektronische Daten] [Sijia Chen, Lingjiang Kong, Jianyu Yang] Radar processors may suffer from performance loss when the heavy clutter is not sufficiently suppressed in a heterogeneous environment. In order to achieve the clutter suppression and further improve the detection performance, the clutter nulling method is widely addressed in radar systems, especially for the low-rank clutter in space-time adaptive processing, where the rank of the clutter covariance matrix is smaller than the length of test data vector. For the ubiquitous clutter-plus-noise environment in practice, where it is assumed as the superposition of the white Gaussian noise and the low-rank compound-Gaussian clutter without the accurately prior information of the texture, this paper develops a clutter nulling approach, whose kernel and emphasis are to obtain the maximum-likelihood estimation of the orthonormal basis vectors of the clutter subspace. Precisely in processing, the proposed clutter nulling method is mainly derived with the application of the Lagrange multiplier method and adaptively implemented using iteration method with the training data. Finally, the results on numerical data validate the advantages of the proposed nulling approach, in comparison with the existing method. Springer Science+Business Media New York, 2014 Clutter nulling nationallicence Heterogeneous environments nationallicence Subspace estimation nationallicence Lagrange multiplier nationallicence Chen Sijia No. 38 Research Institute of China Electronics Technology Group Corporation, Hefei City, China aut Kong Lingjiang School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu City, China aut Yang Jianyu School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu City, China aut Circuits, Systems, and Signal Processing Springer US; http://www.springer-ny.com 34/3(2015-03-01), 987-1000 0278-081X 34:3<987 2015 34 34 https://doi.org/10.1007/s00034-014-9874-6 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00034-014-9874-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Chen Sijia No. 38 Research Institute of China Electronics Technology Group Corporation, Hefei City, China aut NATIONALLICENCE 700 1- Kong Lingjiang School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu City, China aut NATIONALLICENCE 700 1- Yang Jianyu School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu City, China aut NATIONALLICENCE 773 0- Circuits, Systems, and Signal Processing Springer US; http://www.springer-ny.com 34/3(2015-03-01), 987-1000 0278-081X 34:3<987 2015 34 34