Course 204: 802.11ac Training Course - TONEX.com

802.11ac Training Course covers the fundamentals of 802.11c concepts, features, technology, operations and configurations.

Next generation of Wireless LAN technology or 802.11ac standard aims to increase data rates to the region of 1Gbit/s by using wider channels compared to 802.11n such as 80MHz and 160MHz channels.

Up to 8 MIMO spatial streams may be possible and includes higher order modulation such as 256QAM and will be situated in the 5GHz band..

Upon completion of this course, the participant will:

• Understand the fundamental concepts of 802.11ac
• Understand ideas behind MIMO spatial streams
• List Multi-user MIMO (MU-MIMO) features
• Understand Modulation and Other elements/features behind 802.11ac
• Understand MAC modifications
• List Coexistence mechanisms for 20/40/80/160 MHz channels, 11ac and 11a/n devices
• List scenarios and  configurations

Introduction to 802.11ac

• What is 802.11ac?
• 802.11ac Standard
• High Speed WiFi
• VHT (Very High Throughput)
• 802.11ac Key Requirements
• Compatibility Issues
• Enhancements for Very High Throughput for operation in bands below 6GHz
• Operation in the 5 GHz spectrum
• 802.11ac MAC
• 802.11ac PHY
• Different modulation types (BPSK, QPSK, 16QAM, 64QAM and 256QAM)
• Different bandwidths (20 MHz, 40 MHz, 80 MHz and 160 MHz)
• 20, 40, and 80 MHz Channels
• The use of 160 MHz Channels
• Configurable frame length
• OFDM signal and 4x4 MIMO
• RF channel Issues
• RF Channel Performance

802.11ac Core Concepts

• TGac Usage Models R2
• TGac Feature Requirements and Evaluation Methodology
• TGac Channel Model Addendum v12
• Specification Framework 

802.11ac Key Requirements

• Backwards Compatibility
• Coexistence
• Single-STA (station) throughput
• MAC Service Access Point (SAP)
• Multi-STA throughput (measured at the MAC SAP)

802.11ac PHY

• Channelization
• OFDM Structure in both time and frequency domain
• From Bandwidth to OFDM Subcarriers
• Subcarriers per 11ac Transmission Bandwidth
• Subcarrier Rotation per Signal Bandwidth
• OFDM Symbol Characteristics of a 802.11ac signal
• Long and Short Cyclic Prefix
• Signal Bandwidth
• FFT Length
• Cyclic Prefix Length

Frame Format

• VHT Mixed Format PPDU
• VHT Preamble fields in detail 
• VHT SIG-A 
• VHT STF
• VHT LTF
• VHT SIG-B 

802.11ac Data Field for Single User with BCC 

• 802.11n Modulation
• 802.11n Interleaving
• 802.11n Coding Architecture
• 11ac Single User MCS Indices

802.11ac Transmitter Specification 

• Transmit Spectrum Mask
• Spectral Mask for 20, 40, 80 and 160 MHz Channels
• Frequency Offsets for Spectral Mask Requirement
• 80 + 80 MHz Non-Contiguous Spectrum Mask Values
• Transmit Spectral Flatness
• Transmit Center Frequency and Symbol Clock Tolerance
• Packet Alignment
• Transmitter Modulation Accuracy
• TransmitterCenterFrequency Leakage
• Transmitter Constellation Error 

802.11ac Receiver Specification

• Receiver Minimum Input Sensitivity
• Adjacent and Nonadjacent Channel Rejection
• Receiver Maximum Input Level
• Clear Channel Assessment (CCA)

802.11ac operation scenarios and testing

• Operation Scenarios
• Signal Analysis and Testing
• Analyze IEEE 802.11ac signals
• Critical RF parameters such as EVM per carrier, per symbol, and per constellation type
• Burst Detection failed
• Time Sync failed