PSS is a specific physical layer signal that is used for radio frame synchronization. It has characterstics as listed below.

PSS是物理層信號用于無線幀同步，其具有以下特征。

Mapped to 127 active sub carriers around the lower end of the system bandwidth (subcarrier 80~206)

映射到激活的127個子載波，其位于系統(tǒng)帶寬的下端（子載波80~206）；

Made up of 127 m-Sequence Values

它由127位的m序列生成；

Used for Downlink Frame Synchronization

用于下行幀同步；

One of the critical factors determining Physical Cell ID

它是組成物理標識PCI主要成分之一； 

Comparision to LTE PSS

與LTE中PSS對比

Following is the PSS sequence generation formula for NR PSS and LTE PSS. As you see here, NR PSS is a kind of m-Sequence whereas LTE PSS is a kind of Zadoff-chu sequence.

NR和LTE的PSS生成公式如下圖：

NR的PSS是由m序列生成，LTE的PSS是由一種ZC序列生成；

Sequence Generation Algorithm

序列生成算法

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.

NR中PSS序列是根據(jù)如下算法生成；建議了解該算法中的幾個主要因素;

The sequence is determined by NID(2) as in LTE. 

生成序列的NID(2)與LTE相同

5G)(NR)中的PSS.docx