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arXiv 2009.03091cs.LGcs.IRstat.ML
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传感器退化的迭代校正及贝叶斯多传感器数据融合方法

Iterative Correction of Sensor Degradation and a Bayesian Multi-Sensor Data Fusion Method

ETH Zürich(苏黎世联邦理工学院)

Luka Kolar, Rok Šikonja, Lenart Treven

摘要:

我们提出了一种新的方法推断地面实况信号从多个退化的信号,受不同数量的传感器曝光。该算法通过仅从两个信号之间的比率对两个信号进行迭代校正来学习乘性退化效应。退化函数d应该是连续的,满足单调性,并且d(0)= 1。我们使用平滑单调回归方法,在那里我们很容易将上述标准的拟合部分。我们包括理论分析和证明收敛到地面实况信号的无噪声测量模型。最后,我们提出了一种方法来融合噪声校正信号使用高斯过程。我们使用稀疏高斯过程,可以用于大量的测量与一个专门的内核,使所有传感器的噪声值的估计。数据融合框架可以自然地处理数据缺口,并提供一种简单而强大的方法来观察多个时间尺度上的信号趋势(长期和短期信号特性)。校正方法的可行性进行了评估与已知的地面真实信号的合成数据集。

英文摘要:

We present a novel method for inferring ground-truth signal from multiple degraded signals, affected by different amounts of sensor exposure. The algorithm learns a multiplicative degradation effect by performing iterative corrections of two signals solely from the ratio between them. The degradation function d should be continuous, satisfy monotonicity, and d(0) = 1. We use smoothed monotonic regression method, where we easily incorporate the aforementioned criteria to the fitting part. We include theoretical analysis and prove convergence to the ground-truth signal for the noiseless measurement model. Lastly, we present an approach to fuse the noisy corrected signals using Gaussian processes. We use sparse Gaussian processes that can be utilized for a large number of measurements together with a specialized kernel that enables the estimation of noise values of all sensors. The data fusion framework naturally handles data gaps and provides a simple and powerful method for observing the signal trends on multiple timescales(long-term and short-term signal properties). The viability of correction method is evaluated on a synthetic dataset with known ground-truth signal.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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