自动化学报2011，Vol.37Issue(10)：1206-1212,7.DOI:10.3724/SP.J.1004.2011.01206
非均匀杂波环境下基于贝叶斯方法的自适应检测
Adaptive Detection Based on Bayesian Approach in Heterogeneous Environments
摘要
Abstract
The performance of adaptive detection of an interested signal degrades when the environment is heterogeneous, I.e., the training data samples used for adaption do not share the same covariance matrix as the cell under test (CUT). To circumvent the problem, a Bayesian generalized likelihood ratio test (B-GLRT) detector is derived. On the one hand, the heterogeneity is considered at the design stage of B-GLRT by means of the statistical modeling of the covariance matrixes of CUT and training data in heterogeneous environment. Meanwhile, the degree of heterogeneity can be tuned through scalar. On the other hand, a prior distribution is assigned to covariance matrix to exploit some prior knowledge for performance improvement. Numerical simulations show that B-GLRT outperforms the conversional non-Bayesian detectors. Meanwhile, the influence of heterogeneity and prior knowledge on detection performance is illustrated.关键词
自适应检测/非均匀杂波环境/贝叶斯方法/先验知识/广义似然比检测Key words
Adaptive detection/heterogeneous environment/Bayesian method/prior knowledge/generalized likelihood ratio test (GLRT)引用本文复制引用
周宇,张林让,刘昕,刘楠..非均匀杂波环境下基于贝叶斯方法的自适应检测[J].自动化学报,2011,37(10):1206-1212,7.基金项目
国家自然科学基金(60901067,61001213),中央高校基本科研业务费专项资金资助 （60901067,61001213）
