Fig. 1From: Polar codes for non-identically distributed channelsSystem model. Non-identically distributed parallel channels. Interleaver Q is inserted to make a set of virtually ordered transmit channels from {W (j)} to {W(j)′},j∈ [ 1,N]. By applying the interleaver, {W (j)} is sorted in a way that maximize the reliability and the achievable rateBack to article page