What is PSS and SSS in LTE?

What is PSS and SSS in LTE?

What is PSS and SSS in LTE?

In LTE, there are two downlink synchronization signals which are used by the UE to obtain the cell identity and frame timing. Primary synchronization signal (PSS) Secondary synchronization signal (SSS)

Why SSS is placed before PSS?

SSS helps to achieve radio frame synchronization and deduce a pointer towards 1 of 168 Physical layer Cell Identity (PCI) groups. Below diagram shows how PSS and SSS helps finding the Physical Layer Cell ID.

What is PSS signal?

The PSS (Primary Synchronization Signal) provides downlink synchronization information for the UE. The signal is based on one of three Zadoff-Chu sequences that in effect generates a pseudo noise pattern to enable the UE to discriminate between synchronization signals on adjacent cells.

What is PSS in 5G?

5G-NR Primary Synchronization Signal (PSS) is Physical Layer specific signal and help UE to get Radio Frame Boundary. It is type of an m-Sequence which is a special type of LFSR (Linear Feedback Shift Register) sequence provides the longest non-repeating sequence.

What is the purpose of PSS in 5G?

What is PCI in LTE?

A Physical Cell Id (PCI) is the identifier of a cell in the physical layer of the LTE net- work, which is used for separation of different transmitters. Due to the construction of PCIs, the number of PCIs are limited to 504.

What is the use of PSS and SSS in 5G?

PSS stands for Primary Synchronization Signal, SSS stands for Secondary Synchronization Signal and ESS stands for Extended Synchronization Signal. Radio frame in 5G-TF is 10ms in duration. It has total 100 slots or 50 subframes. Each subframe consists of two consecutive slots.

How UE decode PSS and SSS in 5G?

UE tries to detect PSS, SSS signals to acquire frequency and time synchronization. Once UE successfully detect PSS/SSS, it gains the knowledge about synchronization and Physical cell ID (PCI), now UE is ready to decode PBCH. Once UE successfully decoded PBCH, it tries to PDCCH and PDSCH for RMSI and OSI.

What is purpose of PSS?

How many PCI are in 5G?

1008 unique PCIs
How 5G PCI is calculated? So PCI values will vary from 0 to 1007. 5GNR supports 1008 unique PCIs .

What is Rsrp and Rsrq in LTE?

RSRP – The average power received from a single Reference signal, and Its typical range is around -44dbm (good) to -140dbm(bad). RSRQ – Indicates quality of the received signal, and its range is typically -19.5dB(bad) to -3dB (good).

What is SSB in 5G?

SS Block(SSB) stands for Synchronization Signal Block and in reality it refers to Synchronization/PBCH block because Synchnronization signal and PBCH channel are packed as a single block that always moves together.