| 摘要: |
| 基于Rao和Wald检验准则，本文推导了联合子空间（Union of Subspaces, UoS）检测器（UoS-Rao、UoS-Wald），并通过引入一个可调参数提出一种可调检测器（UoS-Tunable），从而实现联合子空间目标检测，通过调节参数来灵活调节检测器的检测性能、分类性能与选择性。当可调参数较小时，可以提高检测性能与分类性能，并提高其对信号失配的鲁棒性；当可调参数较大时，则会降低检测性能与分类性能，但会提高其对于信号失配的选择性。最后，仿真实验验证了所提方法的有效性。 |
| 关键词: 自适应信号检测 子空间信号检测 联合子空间 信号失配 |
| DOI：DOI:10.3969/j.issn.1672-2337.2021.05.012 |
| 分类号:TN957.51 |
| 基金项目:国家自然科学基金(No.61871307, 61901467)； 航天科技基金(No.SAST2018-098); 航空基金(No.20180181001)；国防科技项目基金(No.2019-JCJQ-JJ-060)；中国博士后科学基金资助项目(No.2019M653561, 2020T130493) |
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| Tunable Union of Subspaces Signal Detection |
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GAO Yongchan, PAN Liyan, WANG Yang，MAO Linlin
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1.Xidian University, Xi'an 710071, China;2. Beijing Aerospace Xinli Science and Technology Company Limited, Beijing 100089, China;3. Institute of Acoustics, Chinese Academy of Sciences, Beijing 100089, China
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| Abstract: |
| Based on Rao and Wald test criteria, two union of subspaces (UoS) detectors (UoS-Rao and UoS-Wald) are deduced in this paper. A tunable detector (UoS-Tunable) is proposed by introducing an adjustable parameter, which can effectively achieve union of subspaces target detection. The detection performance, classification performance and selectivity of the tunable detector can be flexibly adjusted by altering the parameter. When the adjustable parameter is small, the detection performance and classification performance of the detector can be improved, as well the robustness of the detector to signal mismatch. When the adjustable parameter is large, the detection performance and classification performance of the detector are reduced, but the selectivity of the detector to signal mismatch is improved. Finally, the simulation results show the effectiveness of the proposed method. |
| Key words: adaptive signal detection subspace signal detection union of subspaces signal mismatch |
