a right shift of the register data. The new value x(6) is calculated by a logical exclusive, or from the values 0 and 4 of the register. The PSS is an M-sequence, which is characterized by the following equation: x(i+7)=(x(i+4)+x(i)]mod2(0is 119). 5G-NR Radio Interface - The Physical Layer The generated PSS sequence is written as d (n) = - 2x(m), m=(n+43N(3)mod127. N(2) represents the number of the cell in the group and can take integer values between 0 and 2. 4.5.1.2. Physical SSS signal The physical SSS signal performs the following functions: - determination of the Cyclic Prefix (CP), normal or extended; - determination of the number value NB Ncell is the physical identity of the cell PCI (Physical Layer Cell Identity). Ncell can take 1008 values and is calculated by: The SSS signal corresponds to a Gold sequence of 127 bits among 336 possible sequences. NB represents the group number (0-335). The physical SSS signal is generated by the Gold sequence, resulting from the two M-sequences, x0 and X1, according to: The SSS sequence is generated by: d(n)[1-2xo((n+my)mod127)][1-2x,((n+m)mod127)] with m==15 and m1 = mod112. 4.5.1.3. Physical PBCH channel The physical PBCH channel transmits the BCH (Broadcast Channel) transport channel, which contains the system information corresponding to the MIB message. 106 NG-RAN and 5G-NR The MIB message is mixed with a scrambling sequence from the Gold sequence and is initialized with the cell identity number: c(n) = mod 2 (n+31)=(x,(n+3)+x,(n)) mod2 x2(n+31)=(x2(n+3)+x2(n+2)+x2(n+1)+x2(n))mod2 = with the vectors initialized as follows: = (0,1,.. 30) = Cinit = N cell , = cell identity. 4.5.1.4. The mapping of SSB The SSB block consists of 4 OFDM symbols in the time domain and 240 subcarriers in the frequency domain. The SSB block is transmitted over antenna port 4000. The PSS signal is located on the symbol 0 and is spread over 127 subcarriers. The SSS signal is located on symbol 2 and is spread over 127 subcarriers. The PBCH signal is mapped on 240 subcarriers at symbol 1 and 