论文标题
一种稀疏的学习方法,用于检测多种噪音样干扰器
A Sparse Learning Approach to the Detection of Multiple Noise-Like Jammers
论文作者
论文摘要
在本文中,我们解决了通过配备有多种传感器阵列的雷达系统检测多个噪声样干扰器(NLJ)的问题。为此,我们开发了一个优雅而系统的框架,其中设计了两个架构以共同检测未知数的NLJ,并估算它们各自的到达角度。随后的方法与循环估计程序结合使用,该方法在设计阶段促进了先验的稀疏性。事实上,手头的问题具有适当利用的固有稀疏性质。从数学的角度来看,这种方法论选择是由以下事实决定的。经典的最大似然方法导致了棘手的优化问题(至少据作者的最佳知识),因此,次级级方法代表了解决方案的可行手段。在模拟数据上进行了性能分析,并显示了所提出的体系结构在绘制电磁威胁的可靠图片中的有效性。
In this paper, we address the problem of detecting multiple Noise-Like Jammers (NLJs) through a radar system equipped with an array of sensors. To this end, we develop an elegant and systematic framework wherein two architectures are devised to jointly detect an unknown number of NLJs and to estimate their respective angles of arrival. The followed approach relies on the likelihood ratio test in conjunction with a cyclic estimation procedure which incorporates at the design stage a sparsity promoting prior. As a matter of fact, the problem at hand owns an inherent sparse nature which is suitably exploited. This methodological choice is dictated by the fact that, from a mathematical point of view, classical maximum likelihood approach leads to intractable optimization problems (at least to the best of authors' knowledge) and, hence, a suboptimum approach represents a viable means to solve them. Performance analysis is conducted on simulated data and shows the effectiveness of the proposed architectures in drawing a reliable picture of the electromagnetic threats illuminating the radar system.