Denoising CSI Signals Phase Correction: Obervation 1: -Magnitude of static values is more than ten times higher than that of the dynamic value 3.8 3.5 70 3 40 30 2.5 30 60 90120 150 180 30 60 90 120 150 180 Subcarrier index Subcarrier index (a)CSI time series pattern (b)Variance of different subcarriers Motivation System design Experiments Conclusions 8/20Denoising CSI Signals Motivation System design Experiments Conclusions 8/20 ➢ Phase Correction: Obervation 1: — Magnitude of static values is more than ten times higher than that of the dynamic value (a) CSI time series pattern (b) Variance of different subcarriers