Enhanced Matrix CFAR Detection With Dimensionality Reduction of Riemannian Manifold

作者：Zheng Yang, Yongqiang Cheng, Hao Wu, Hongqiang Wang · 发表于：IEEE Signal Processing Letters · 年份：2020 · DOI：10.1109/lsp.2020.3037489 · 被引用次数：11 · 研究领域：Radar Systems and Signal Processing、Advanced SAR Imaging Techniques、Sparse and Compressive Sensing Techniques

This letter proposes an enhanced matrix constant false alarm rate (CFAR) detection method that works on the lower-dimensional Riemannian manifold. Motivated by general matrix CFAR detection method and dimensionality reduction scheme of the Riemannian manifold, this method obtains a mapping by maximizing the geometric test statistic. Dimensionality reduction is formulated as an orthonormal constraint optimization problem on the Grassmann manifold. Moreover, an explicit mapping is obtained by solving the optimization problem via conjugate gradient approach. Performances of the proposed method are evaluated on the lower-dimensional Riemannian manifold. Experiments on simulated data and real sea clutter data demonstrate that our method leads to the robustness to outliers and the improvement of detection performance over classical methods.