Fig. 1From: Computing tight upper bounds for Bhattacharyya parameters of binary polar code kernels with arbitrary dimensionThe common column binary tree of \({\varvec{x}}^{(i,u_i)}\): \({\varvec{\lambda }}_k\) denotes the CCI for stage k, and \(\gamma\) represents the CCV of \({\varvec{x}}_{j::2^k,:}^{(i,u_i)}\)Back to article page