ng the configuration of the radio link of the BWP band. 116 NG-RAN and 5G-NR 4.5.2.2.4. The physical DM-RS signal associated with the PBCH channel Associated with the PBCH, the DM-RS is a Gold sequence generated by the following formula: with c(n) as the Gold sequence extracted from the following two M-sequences: =(x,(n+N)+x2(n+N))1 mod G(n+31)=(x,(n+3)+x,(n)) = mod X2 (n+31)=(x2(n+3)+x2(n+2)+x2(n+1)+x2(n))mod = At the start of each subframe, the initial value Cinit of the pseudo-random sequence is calculated from the following formula: with iSSB, which depends on the number of the slot SSB in an SSB burst. The mapping of the DM-RS signal associated with the PBCH channel is shown in Table 4.7. 4.5.2.3. The physical PRS signal The physical PRS was introduced in Release 9. The physical PRS is used by the mobile for the implementation of the OTDOA function. The OTDOA function is based on the measurement, by the mobile, of the time difference between the reception of the physical PRS signal from the reference cell. The location of the mobile is obtained from three measurements taken on three geographical neighbor cells. The physical PRS is associated with the antenna port 5000. The physical PRS should not be mapped to the resource elements used for the physical PSS, SSS and PBCH. 5G-NR Radio Interface - The Physical Layer 117 The PRS physical signal is a Gold sequence generated by the following formula: with c(n) as the Gold sequence extracted from the following two M-sequences: x,(n+31)=(x(n+3)+x,(n))mod2 x2(n+31)=(x2(n+3)+x2(n+2)+x2(n+1)+x2(n))mod2 At the start of each subframe, the initial value Cinit of the pseudo-random sequence is calculated from the following formula: is a random number between 0 and 4095 which is transmitted by the RRC layer in the dl-PRS-SequenceIDr-16 parameter and 1 corresponds to the number of OFDM symbols in the slot. A PRS burst is made up of several PRS blocks. A PRS block consists of a PRS sequence mapped to consecutive and configurable symbols (PRS occasion). PRS #0 PRS #1 PRS #2 PRS