on of the zero vectors. A binary polynomial over GF(2) can be associated with the linear feedback shift register. The degree of polynomial is equal to the length of the shift register and the coefficients that are either 0 or 1 correspond to the taps of the register. New Radio Access Physical Layer Aspects (Part 2) 479 PSS/SSS sequence 8 Subcarriers 9 Subcarriers Frequency 132133134 135 136 137 138 139 140 141 142143 Figure 4.28 Illustration of PSS/SSS sequence mapping to the resource elements [6]. in the following formula where Nin e{0,1,..., 335} and The cell number information is carried in PSS, whereas the cell group number is carried in SSS. It is worthwhile mentioning that the physical beams associated with an SS blocks are transparent to the UE, since the latter only sees the equivalent synchronization signals and the PBCH after precoding and/or beamforming operations that are implementation specific. 4.1.4.1 Primary Synchronization Sequence The PSS sequence dpss(n) is defined by dpss(n) = 2x(m) where 127 and 0<n<127. In the latter expression, e(i+7)=[x(i+4)+x(i)]mod 2 and [x(6) x(5) x(4) x(3) x(2) x(1) x(0)] = [ 110110]. The sequence symbols (126) containing the PSS is scaled by a factor of BPSS in order to adjust its transmission power and is mapped to resource elements (k,l) in increasing order of k where k and l represent the frequency and time indices, respectively (see Table 4.3), within one SS/PBCH block. The PSS sequence mapping to resource elements in the fre- quency domain is illustrated in Fig. 4.28. Furthermore, the time-frequency structure and timing of the PSS transmission are depicted in Fig. 4.29. 4.1.4.2 Secondary Synchronization Sequence The secondary synchronization signal sequence dsss(n) is defined as dsss(n) = and 0n<127. In the latter expression, x1(i+7)= [x1(i+1)+xx(i)]m where xo(6) xo(5) xo(4) x1(6) x1(5) x1(4) x1(3) x1(2) x1(1) x1(0) sequence of symbols dsss(0), dsss(126) containing the secondary synchronization signal is scaled by a factor of BSSS and is mapped to resource elemen