What is frequency synchronization in LTE?
The synchronization signals present in LTE, namely, primary synchronization signal (PSS) and secondary synchronization signal, that carry cell ID are critically exploited in the algorithms. Extensive simulations are carried out on a time-varying frequency-selective channel to analyze the performance of the algorithms.
What is frequency synchronization?
Frequency synchronization is the ability to distribute precise frequency around a network. Phase refers to the fraction of a cycle of a periodic quantity that has been completed at a specific reference time, expressed as an angle. In phase synchronization, multiple clocks of various frequencies are phase synchronized.
What is primary synchronization signal in LTE?
Primary synchronization signals consist of one of three 62-symbol Zadoff-chu sequences in a cell. The Primary Synchronization Signal (PSS) is broadcast twice during every radio frame and both transmissions are identical.
How UE decode PSS and SSS?
The PSS is repeated in subframe 5 which means UE is synchronized on 5ms basis since each subframe is 1ms. From PSS, UE is also able to obtain physical layer identity (0 to 2). In the next step UE finds the secondary synchronization signal (SSS).
What is purpose of PSS?
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.
Does LTE require GPS?
GPS requirements Until now, the frequency-division duplex (FDD) was the main method used for mobile phones. However, for 3.9 generation LTE systems, manufacturers have also started using the TDD (TD-LTE) method worldwide that requires GPS.
Why do we need frequency synchronization?
Time synchronized networks enable accurate time stamping by each of the computers on the network. This is important to properly sort events and transactions into chronological order so that any disturbances or problems in the data can easily be detected and resolved.
Why do we need synchronization?
The need for synchronization originates when processes need to execute concurrently. The main purpose of synchronization is the sharing of resources without interference using mutual exclusion. The other purpose is the coordination of the process interactions in an operating system.
What is PSS SSS?
The primary synchronization signal (PSS) is linked to the cell identity within the group ( N I D ( 2 ) ). The secondary synchronization signal (SSS) is linked to the cell identity group ( N I D ( 1 ) ) and the cell identity within the group ( N I D ( 2 ) ).
What is 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.
What information does PSS and SSS carries?
In LTE, there are two downlink synchronization signals which are used by the UE to obtain the cell identity and frame timing. The division into two signals is aimed to reduce the complexity of the cell search process.