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Tag: 5G Physical Layer

5G NR Interview Questions for Layer 1

5G Interview Q&A This blog post is for 5G NR interview questions and answers. These 5G interview questions are useful for 5G technical round to get 5G engineer position in […]

March 5, 2023March 8, 2023 Author Interviews

Radio Link Monitoring in 5G – RLM

Introduction When a UE  is connected to the network, it requires to continuously monitor the Radio link for reliable communication, the process is know as Radio Link Monitoring (RLM). The […]

June 6, 2022June 6, 2022 Author 5G, 5G MAC Layer, 5G NR, 5G Physical Layer, RF Optimisation, RRC Signalling

5G NR Downlink HARQ Codebook

In 5G NR, 3GPP specification has defined HARQ Codebook  to provide the feedback to base station for Downlink data transmission i.e., PDSCH Data. UE Sends the ACK/NACK for corresponding PDSCH […]

May 24, 2021October 4, 2021 Author 3GPP Specification, 5G, 5G NR, 5G Physical Layer

5G NR Quasi-Colocation Concept, Types and Application

Two signals transmitted from same antenna port shall experience the same radio channel, where as transmitting it from two different antenna ports shall experience different radio conditions. But there can […]

November 30, 2019July 21, 2020 Author 5G, 5G Physical Layer, Interviews, New Radio, NR

5G NR Antenna Ports – Logical and Physical Antenna Ports

In 5G NR or 4G LTE, Multiple Input-Multiple Output (MIMO) transmission is a key technology specifically in downlink. Signals transmitted from gNB/eNB via different antennas or signals subjected to different […]

November 21, 2019July 21, 2020 Author 5G, 5G Physical Layer, LTE, New Radio, NR, Tech Fundas

5G NR- Physical Layer Timing Unit

In 5G, New Radio the basic time unit is represented by Tc and as per 3GPP TS38.211 can be expression by following equation: Where is subcarrier spacing and is FFT […]

June 18, 2018July 10, 2020 Author 5G, 5G Physical Layer, New Radio, Tech Fundas
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