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LDPC Coding in 5G NR
1. Introduction Channel coding is one of the most fundamental building blocks of the 5G NR physical layer. It directly determines: Block Error Rate (BLER) Throughput at high MCS Latency predictability UE power consumption Hardware scalability in gNB and UE Unlike LTE, which relied almost exclusively on Turbo codes, 5G NR deliberately replaced Turbo codes with Low Density Parity Check (LDPC) codes for data channels and Polar codes for control channels. LDPC Coding Chain in 5

Venkateshu Kamarthi
Jan 159 min read


RRC_INACTIVE State in 5G NR
1. Introduction The RRC_INACTIVE state represents a fundamental architectural innovation in 5G New Radio (NR), introduced to address critical latency and signaling overhead challenges that plagued LTE networks. In LTE, frequent transitions between RRC_IDLE and RRC_CONNECTED states created substantial network signaling load and introduced latency penalties during service resumption, particularly problematic for modern smartphone usage patterns characterized by frequent sm

Venkateshu Kamarthi
Nov 29, 202511 min read
Radio Network Temporary Identifiers (RNTIs) in 5G NR
Introduction In 5G NR, Radio Network Temporary Identifiers (RNTIs) are pivotal for distinguishing UEs (User Equipments), groups of UEs,...

Venkateshu Kamarthi
Aug 1, 20257 min read


PUCCH in 5G NR
Introduction What is PUCCH in 5G NR? The Physical Uplink Control Channel (PUCCH) in 5G New Radio (NR) is the channel through which the...

Venkateshu Kamarthi
Jul 26, 20257 min read


Cyclic Prefix (CP) in LTE & 5G
Introduction Cyclic Prefix (CP) is a crucial component in Orthogonal Frequency Division Multiplexing (OFDM) systems, which are the...

Venkateshu Kamarthi
Jun 26, 20256 min read


UE Power ON and Cell Selection in 5G Standalone (SA)
In a 5G SA network, when the User Equipment (UE) powers on, it must detect, synchronize with, and evaluate a serving cell before...

Venkateshu Kamarthi
May 19, 20255 min read


Reconfigurable Intelligent Surfaces (RIS) vs. Massive MIMO in 6G
Introduction As the wireless industry looks beyond 5G, 6G networks are expected to revolutionize not only connectivity speeds but also...

Venkateshu Kamarthi
May 9, 20256 min read


5G NR Synchronization Signal Block (SSB) - Time/Frequency location
Introduction The Synchronization Signal Block (SSB) is a fundamental component of 5G New Radio (NR) systems, enabling user equipment (UE)...

Venkateshu Kamarthi
Apr 16, 20258 min read
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