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Table 2 Subband size (S) vs. system bandwidth for subband level feedback

From: Adaptive CSI and feedback estimation in LTE and beyond: a Gaussian process regression approach

System bandwidth Subband size
\(N_{\textit {PRB}}^{DL}\) (S)
6–7 NA
8–10 4
11–26 4
27–63 6
64–110 8