PSS (Primiary Synchronization Signal)
PSS is a specific physical layer signal that is used for radio frame synchronization. It has characterstics as listed below.
Comparision to LTE PSS
Sequence Generation Algorithm
NR PSS sequence is generated by the following formula. Unless you are the one who need to implement this, you may not need to understand every details of this formula. But at least it would be good to know of the major factors to determine the sequence. Followings are some highlights about this sequence.
 38.211 NR;Physical channels and modulation(Release 15)