 and attached to the BCH payload using the generator polynomial gCRC24C' (D) = D24 + D23 D21 + D20 + D17 + D 15 + D13 + D 12 + D8+D4+ D2 + D + resulting in the sequence bo,b1,..., bB-1, where B = A + L. The information bits that are then delivered to the channel coding block are denoted by CO,C1,..., CK-1, where K is the number of input bits. They are encoded using a polar encoder by setting the parameters nmax =9,11L = 1, NPC = 0, and nwm=0. = Detailed PBCH channel encoding and decoding block diagram is shown in Fig. 4.11. The output of polar encoder is denoted by do,d1,...,NN-1 where N is the number of coded bits. The input sequence to the rate matching function is do, d1, dn and the output bit sequence after rate matching is denoted by where the rate matching output sequence length is E : 864 and the rate matching is per- formed by setting the parameter IBIL to zero. The preceding polar coding and rate matching parameters will be explained in Section 4.1.7.1 [7]. New Radio Access Physical Layer Aspects (Part 2) 437 Higher layer parameters PBCH payload PBCH payload PBCH payload CRC24C Frozen bit Subblock generation scrambling attachment insertion Polar encoding Rate matching Multiplexing interleaving interleaving Interleaving onto PBCH PBCH encoding procedure Higher layer Determination parameters of known bits PBCH payload PBCH payload PBCH payload Subblock Distributed CRC-aided successive cancellation list Demultiplexing retrieval deinterleaving descrambling deinterleaving dematching from PBCH PBCH decoding procedure Figure 4.11 NR PBCH channel encoding/decoding block diagram [7,35]. The block of bits bo, b ., bNPBCH-1, where NPBCH denotes the number of bits transmitted on the PBCH, is scrambled prior to modulation, resulting in a block of scrambled bits bNPBCH -1 in which b(i) [b(i) vNPBCH)] mod 2 and c(i) denotes a generic pseudo-random length-31 Gold sequence. The scrambling sequence is initialized with = Ncell at the start of each SS/PBCH block. The parameter V is the two least significant bits of the SS/P