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Sensor Selection for Estimation with Correlated Measurement Noise

机译:用相关测量噪声估计的传感器选择

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摘要

In this paper, we consider the problem of sensor selection for parameterestimation with correlated measurement noise. We seek optimal sensoractivations by formulating an optimization problem, in which the estimationerror, given by the trace of the inverse of the Bayesian Fisher informationmatrix, is minimized subject to energy constraints. Fisher information has beenwidely used as an effective sensor selection criterion. However, existinginformation-based sensor selection methods are limited to the case ofuncorrelated noise or weakly correlated noise due to the use of approximatemetrics. By contrast, here we derive the closed form of the Fisher informationmatrix with respect to sensor selection variables that is valid for anyarbitrary noise correlation regime, and develop both a convex relaxationapproach and a greedy algorithm to find near-optimal solutions. We furtherextend our framework of sensor selection to solve the problem of sensorscheduling, where a greedy algorithm is proposed to determine non-myopic(multi-time step ahead) sensor schedules. Lastly, numerical results areprovided to illustrate the effectiveness of our approach, and to reveal theeffect of noise correlation on estimation performance.
机译:在本文中,我们考虑了与相关测量噪声相关的用于参数估计的传感器选择问题。我们通过制定一个优化问题来寻求最佳的传感器激活,在该问题中,由贝叶斯费舍尔信息矩阵的逆轨迹给出的估计误差在能量约束下被最小化。 Fisher信息已被广泛用作有效的传感器选择标准。但是,由于使用近似度量,现有的基于信息的传感器选择方法仅限于不相关的噪声或弱相关的噪声的情况。相比之下,这里我们针对传感器选择变量推导出Fisher信息矩阵的闭合形式,该形式对于任意噪声相关机制都是有效的,并开发了凸松弛方法和贪婪算法来寻找接近最优的解。我们进一步扩展了传感器选择框架,以解决传感器调度问题,该算法提出了一种贪婪算法来确定非近视(提前多次)传感器调度。最后,提供了数值结果以说明我们的方法的有效性,并揭示了噪声相关性对估计性能的影响。

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