LTE (4G) - All About Downlink channels.

Acquire an in-depth understanding of the LTE Air Interface Downlink channels.

Created byGotechnicalNow (GTN)

Last updated 3/2024

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What you'll learn

You will have easy access to comprehensive knowledge of both fundamental and advanced aspects of LTE.
Upon completion of the course, your understanding and imagination of the Downlink channels will be significantly enhanced
Upon completion of the course, you will have cultivated critical thinking and debugging skills that will enable you to effectively analyze and troubleshoot
The course will act as a prerequisite for understanding 5G-NR Downlink Channels

Course content

1 section • 10 lectures • 9h 24m total length

Introduction to channels27:12
The session is designed to kick off with a comprehensive introduction to the LTE (Long-Term Evolution) channels, covering their significance and applications across all layers of the LTE protocol stack.
The Primary and Secondary synchronization channel1:06:13
This session highlights the Primary and Secondary Sync Signals. It explains their distribution on the resource grid and the information they convey. Additionally, it covers the decoding process by the User Equipment (UE).
The Reference Signal and its mapping on Resource grid1:01:59
This session highlights the Reference Signals. It explains their distribution on the resource grid and the information they convey. Additionally, it covers the decoding process by the User Equipment (UE).
PBCH (Physical Broadcast Channel) and Master Information Block (MIB)54:12
PCFICH and PHICH channels1:15:05
PDCCH (Physical Downlink Control Channel) Part 158:54
Understand the physical downlink control channel (pdcch) and how it carries scheduling information for downlink and uplink, with details on resource grids, cfi, cces, and search space.
PDCCH ( Physical Downlink control channel) Part 21:15:25
Explore the downlink control channel PDCCH in LTE, including CCE calculations, common and user-specific search spaces, aggregation levels, and blind decoding with dynamic CFI.
PDCCH Part 3 and Downlink Control Information (DCI)51:15
Explore LTE downlink control information (DCI) formats, including format zero, 1A, 2, and 2A, and how PDCCH conveys uplink and downlink grants, HARQ with RV, PMI, and TPC.
RAT (resource allocation Types) in LTE44:27
Learn how LTE resource allocation types zero, one, and two govern uplink and downlink scheduling, including resource block groups, localized vs distributed mapping, and DCI associations.
HARQ-processing in DL channels49:38

Requirements

No programming skills are required, as a fundamental understanding of networking and data processing in the OSI model will suffice.

Description

This course serves as a comprehensive guide for Downlink channels in 4G LTE technology, as defined by the 3GPP standards and specifications. The content and structure of the course are carefully designed to provide a thorough understanding of the LTE air interface.

Assuming the audience’s familiarity with LTE Basic architecture , History of the mobile evolution, and Physical layer Processing the course starts directly with discussions on 4G Downlink Channels. During the all the Downlink channels are looked up to a great depth.
Below are the course Highlights :

1) Introduction to channels in Details and how they are named across different layers.

2) detailed Discussion on physical Signals like Primary and secondary Sync signals (PSS and SSS), where and how they are transmitted on the resource Grid in time and frequency domain.

3) Detailed Discussion on the Reference Signal (RS) and Physical Broadcast Channel (PBCH)
3) Detailed Discussion on Physical HARQ Indicator Channel (PHICH) and Physical control format indicator channel (PCFICH)
5) In depth Discussion on Physical downlink control channel (PDCCH) , how its decoded and Downlink control Information (DCI).
6) Physical downlink shared channel (PDSCH) and Different resource allocation techniques.
7) Last but but not the least , Detailed Discussion on the Downlink HARQ (Hybrid automatic repeat request) process

Who this course is for:

A passionate learner of LTE and 5G-NR, with a strong ambition to become a proficient wireless protocol tester or developer.