Cell search and synchronization in 5G NR

Abstract

An overview of the physical signals foreseen by the 3GPP 5G New Radio specification for frame synchronization and cell search in fifth- generation wireless broadband access systems is presented in the paper. The frame synchronization algorithm and the cell initialization procedure are demonstrated. An estimate of probability of error detection of a physical identifier by the signals of the primary and secondary synchronization is obtained. The comparison of the successful synchronization in AWGN channel for 4G LTE and 5G NR is shown.

Geospatial Cognitive Networking Protocols and Sensing Algorithms for 5G NR Beamforming

“…Energy and blind detectors leverage the larger data channel in 5G; however, they do not predictively repeat and have unknown beam orientation, unlike SSBs that typically repeat every 20 ms and are guaranteed to only be given to a single beam. Geospatial SSB reuse also should at least operate down to the traditional cell search sensitivity at around -5 dB [29] over energy and blind detectors, which only operate down to around 7 dB and 10 dB [17], respectively, leading to better sensitivity and easier interference control. The geospatial SSB concept has overall easier interference management, lower complexity, and is not impacted by dynamically changing traffic at the cost of potential throughput, as seen in Fig.…”

The Dynamics of the Radiated Field Near a Mobile Phone Connected to a 4G or 5G Network

“…One of the biggest differences between 4G and 5G is that in 5G the SS blocks are transmitted as a directional signal with a high periodicity, while in 4G the Cell-specific Reference Signal (CRS) is distributed in frames and is transmitted throughout the cellular network. An SS/PBCH block consists of a Physical Broadcast Channel (PBCH) and De-Modulation Reference Signals [13].…”