Secondary synchronization signal NR Abhijeet Kumar5G 10Aug After the UE has detected PSS and acquired symbol timing and initial frequency synchronization, it detects SSS which carries the physical cell identity. Secondary synchronization Signal SSS signal 336 different sequences called Physical-Layer Cell-Identity groups (0-335) Ν1(ID)in 3GPP PhysicalLayerCellIdGroup Secondary synchronization signal is based on maximum length sequences (Gold-sequences) The NR-SSS carries the information including the radio frame timing and the cell ID groupSS/PBCH The NR-SSS detection is done based on the relative position between the NR-PSS and the NR-SSS. Since the SSS is located on the same frequency location as PSS and one OFDM symbol apart, the UE may perform either non-coherent or coherent detection using channel estimates based on PSS. Furthermore, since there are 1008 NR cell IDs and 3 NR PSSs, we need a set of 1008 NR SSS sequences that can be divided into 3 sub-sets, each with 1008/3 = 336 NR SSS sequences associated to one of the three NR PSS sequences. Sequence generation: The sequence dsss(n) for the secondary synchronization signal is defined below. Sequence generation where 𝑥0(𝑘) and 𝑥1(𝑘) (𝑘=0, 1, ⋅ ⋅ ⋅ , 126) are two length-127 (binary) m-sequences and 𝑚0 and 𝑚1 are their corresponding cyclic shift values determined by the cell ID. The sequence of symbols dsss(0) . . . dsss(126) containing the secondary synchronization signal is scaled by a factor of βSSS and is mapped to resource elements (k,l) in increasing order of k where k and l represent the frequency and time indices, Check related articles: https://cafetele.com/5g-nr-primary-synchronization-signalpss/ https://cafetele.com/pssssspbch-overview/ You Might Also Like 14Nov Roaming Reference Architectures 5G NR Abhijeet Kumar 20Nov What is CORESET? Abhijeet kumar 25Oct 5G NR Protocol Video Abhijeet kumar 15Sep Packet Data Convergence Protocol(PDCP) NR Abhijeet Kumar 10Sep DSS – Dynamic Spectrum Sharing 5G-LTE Abhijeet kumar 07Sep 5G MAC Protocol Abhijeet Kumar