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Performance Analysis of a Robust Matched Subspace Detector

机译：鲁棒匹配子空间探测器的性能分析

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摘要

The area of robust detection in the presence of partly unknown useful signal or interference is a widespread task in many signal processing applications. In this paper, we consider the robustness of a matched subspace detector in additive white Gaussian noise, under the condition that the noise power is known under null hypothesis, and unknown under alternative hypothesis when the useful signal triggers an variation of noise power, and we also consider the mismatch between the signal subspace and receiver matched filter. The test statistic of this detection problem is derived based on generalized likelihood ratio test, and the distribution of the test statistic is analysis. The computer simulation is used to validate the performance analysis and the robustness of this algorithm at low SNR, compared with other matched subspace detectors.
机译：在部分未知的有用信号或干扰的情况下，进行鲁棒检测的领域是许多信号处理应用程序中的一项广泛任务。在本文中，我们考虑了匹配子空间检测器在加性高斯白噪声中的鲁棒性，条件是在无效假设下噪声功率已知，而有用信号触发噪声功率变化时在替代假设下噪声功率未知，还应考虑信号子空间和接收器匹配滤波器之间的不匹配。基于广义似然比检验推导了该检测问题的检验统计量，并对检验统计量的分布进行了分析。与其他匹配的子空间检测器相比，计算机仿真被用来验证该算法在低SNR下的性能分析和鲁棒性。

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