论文|Mengjiao Tang, Yao Rong, X. Rong Li and Jie Zhou. Invariance Theory for Adaptive Detection in Non-Gaussian Clutter

本文原载IEEE Transactions on Signal Processing,由四川大学数学学院周杰教授等科研人员创作，系四川大学“智慧法治”超前部署学科系列学术成果。后续会持续分享四川大学“智慧法治”超前部署学科系列学术成果，欢迎大家阅读。

Abstract: This paper studies the problem of detecting range-spread targets in (possibly non-Gaussian) clutter whose joint distribution belongs to a very general family of complex matrix-variate elliptically contoured distributions. Within the family, we explore invariance with respect to both the distributional type and relevant parameters. Several groups are used to describe these invariance mechanisms, and a relationship is revealed between the group invariance and the constant false alarm rate (CFAR) properties in terms of model parameters, the generator function, or both. We then build a maximal invariant framework for the detection problem. This involves deriving the corresponding maximal invariants as well as their statistical characterizations. Using these results, we put forward several maximal invariant detectors, all of which are fully CFAR in that their false alarm rates are completely independent of the underlying clutter distribution. Numerical results show that all the proposed fully CFAR detectors are effective, and for the considered simulation setup, one of them outperforms the others and several existing ones.

Keywords: Invariance theory, range-spread targets, non-Gaussian clutter, fully CFAR

Mengjiao Tang, Yao Rong, X. Rong Li and Jie Zhou, Invariance Theory for Adaptive Detection in Non-Gaussian Clutter, IEEE Transactions on Signal Processing, Vol. 68, pp. 2045-2060, October 2020.（论文下载）