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• W2008532021 abstract "Most of the signals recorded in experiments are inevitably contaminated by measurement noise. Hence, it is important to understand the effect of such noise on estimating causal relations between such signals. A primary tool for estimating causality is Granger causality. Granger causality can be computed by modeling the signal using a bivariate autoregressive (AR) process. In this paper, we greatly extend the previous analysis of the effect of noise by considering a bivariate AR process of general order $p$. From this analysis, we analytically obtain the dependence of Granger causality on various noise-dependent system parameters. In particular, we show that measurement noise can lead to spurious Granger causality and can suppress true Granger causality. These results are verified numerically. Finally, we show how true causality can be recovered numerically using the Kalman expectation maximization algorithm." @default.
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• W2008532021 date "2014-12-18" @default.
• W2008532021 modified "2023-09-30" @default.
• W2008532021 title "Effect of measurement noise on Granger causality" @default.
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• W2008532021 doi "https://doi.org/10.1103/physreve.90.062127" @default.
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