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Estimation of the noise variance in time series using a median filter

Pęksiński J., Mikołajczak G.

Computer Applications in Electrical Engineering

2014

Vol. 12

316--323

Information about the level of signal interference, allows you to select the appropriate method pre-processing information. Assuming that the disturbance is a process additive, a normal distribution can do this using the smoothing filters, and in particular the median filter. This paper presents a method of estimating the level of disturbance, based on median filtration and the assumption that the smoothing process applies to noise, exclusively. The knowledge of a noise reduction coefficient enables the determining of an estimated quantity.