Modern Digital Modulation Techniques for Wireless, Satellite, and Wireline Communications - 5G and Beyond - CEI-Europe
Course #58

Modern Digital Modulation Techniques for Wireless, Satellite, and Wireline Communications - 5G and Beyond

March 12 - 16, 2018 . Barcelona, Spain

We recommend you to submit your preliminary or firm registration at least 4 weeks before course start to ensure a seat on the course.

TECHNOLOGY FOCUS

Modern digital modulation techniques and multiple access techniques are basic building blocks of the physical (or radio) interface of all digital communication systems. Many of these techniques will also be used in the Fifth Generation (5G) cellular systems, which are presently under discussion throughout the world. Techniques such as OFDM, OFDMA, SOFDMA, SC-FDMA, DMT, MIMO, Massive MIMO, BLAST, CPM modulations (e.g., GMSK), and adaptive modulation and coding methods are very important parts of the radio interfaces of modern communications systems, especially for broadband wireless communications. Recently there have been a number of new OFDM-based proposals, e.g., GFDM, and FBMC for the modulation of 5G. There have also been other new 5G modulation proposals based on "Faster-Than-Nyquist" (FTN) signaling, Wave Modulation (WM) and Spatial Modulation.

All of the concepts described above have been, or may be, utilized in present and future mobile broadband wireless systems, including the 4G-LTE system, the Wi-Fi (IEEE 802.11) systems, and future 5G cellular systems. These techniques are also in use ADSL, DOCSIS and other wireline systems.

COURSE CONTENT
We will describe the digital modulation techniques used in the major wireless and wireline communication systems of today and for those being planned for the near future. During the course we will discuss the challenges of the future Fifth Generation (5G) cellular systems. These systems, which are scheduled to appear commercially around the year 2020 (or earlier), will challenge our present concepts and technologies. The 5G systems will utililize many of the concepts to be discussed in the course.

We begin the course with a discussion of the characteristics of the major communications channels wth special emphasis on the fading channel of wireless communications. We continue with a description of the classic modulations, e.g., Nyquist Signaling, QPSK, QAM (and Offset QAM) and GMSK, and the optimum receivers for these modulations. We will place special emphasis on OFDM and its related multiple access techniques, e.g., OFDMA, SOFDMA, SC-FDMA. This discussion will include a description of the radio interfaces of Wi-Fi, 4G-LTE, and IMT-Advanced (4G). We will then discuss some of the new OFDM-based proposals for 5G as well as other proposals for new modulations for future 5G systems, including "Faster-than-Nyquist" (FTN) signaling, Wave Modulation (WM), Spatial Modulation and the OTFS (Orthogonal Time Frequency and Space) modulation.

We will cover the space, time and frequency diversity techniques used in new wireless systems with special emphasis on MIMO, BLAST and Massive MIMO techniques. Massive MIMO is one of the major elements of proposals for 5G systems.

Other important subjects to be covered, are Alamouti space-time coding, iterative techniques, and adaptive modulation and coding, as well as the very important limits on communications based on information theory. These limits are the basis for coding, OFDM, MIMO and other important results. The coding techniques including convolutional coding and turbo-coding, and their performance in mobile wireless systems are included.

We will also discuss constant envelope (CPM) modulations, e.g., GMSK and MSK, which are still important modulations for wireless and space communications. And finally we finish the course with a description of CDMA, is a major multiple access techniques used in  Second and Third Generation Cellular Systems.


OBJECTIVES
After participating in this course, you will:

  • Understand the modulations and multiple access techniques in use in modern mobile wireless (including satellite communications), broadband access and wireline communications, especially 5G.
  • Understand OFDM, OFDMA, Scalable OFDMA (SOFDMA), SC-FDMA as well as their   implementation based on DMT. And understand OFDM-based modulations, e,g., GFDM.
  • Understand the performance of classic modulations such as QPSK and QAM, as well as the CPM modulations, e.g., GMSK
  • Understand the space, time and frequency diversity techniques of wireless communications e.g., MIMO, Massive MIMO, BLAST, Massive MIMO and Alamouti Coding
  • Be familiar with the radio (or physical) interfaces of the Wi-Fi, 4G-LTE  and the 5G proposals
  • Understand the challenges faced by the planners of the Fifth Generation (5G) systems and the possible solutions to these challenges
  • Understand some old ideas like Offset QAM and "Faster-than-Nyquist" Signaling, which may be used in new 5G systems.

 

Monday
Rayleigh Fading Channel and Baseband Nyqvist Signaling
The course begins with a description of the channel models for mobile and/or wireless and wireline systems. This is followed by discussions of Nyquist baseband signalling, as well as ISI and linear equalization.

  • "A Bit of History"
  • Discussion of the challenges facing the  Fifth Generation (5G)
  • Introduction to Analog and Digital Communications
  • System Model-The Channel
  • The Multipath Channel (Rayleigh, Delay Spread and Frequency-Selective Fading)
  • Introduction to Diversity Techniques-Antenna Diversity and Coding
  • Twisted-Pair Channel

Brief Review of Fourier Transform, Power Spectral Density, White Noise
Nyquist Signaling

  • ISI, Optimum Filtering, Square-Root Nyquist Filtering, Linear Equalization
  • Partial Response Signals-Why the MLSE and the Viterbi Algorithm?
  • What is "faster-than-Nyquist" Signaling?

Tuesday
Signal Space, Optimum Detection
The concept of signal space is used to define the classical modulation techniques and derive the optimum detectors.

Signal Space, Optimum Detection

  • Signal Space
  • BPSK, QPSK, MPSK, QAM, BFSK and MFSK
  • Optimum Detection of Binary Signals and Probability of Error
  • Matched Filter

The Rayleigh Fading Channel and Antenna Diversity-BLAST, MIMO
An in-depth discussion of the performance of modulations, transmitted over Rayleigh fading channels, followed by a discussion of the concept of space diversity (BLAST, MIMO and Massive MIMO), which is used to greatly improve spectral efficiency.

  • Detectability Performance of BPSK over Rayleigh Fading Channel (SISO)
  • Classic Antenna Diversity (SIMO)
  • Space Diversity
  • MIMO
  • BLAST
  • Massive MIMO-What is it? What can be gained?

Wednesday
MSK-type Signals 
QPSK, SQPSK, and MSK are essentially constant envelope modulations, which are used in many satellite and wireless systems.

  • QPSK, SQPSK, pi/4 - QPSK, EDGE "8PSK"
  • MSK-type (MSK, SFSK) Signals
  • Adjacent Channel Interference (ACI)

M-ary Signals
M-ary signals are used in many systems, e.g., analog modems, ADSL, VDSL, microwave radio, and are the basic modulation of almost all OFDM systems.

  • Optimum Detection of M-ary Signals
  • MPSK
  • Quadrature Amplitude Modulaion (QAM)-Nyquist Signaling
  • Offset QAM-OQAM- 5G Modulation Proposals
  • MFSK

Shannon Information Theory
Shannon information theory is the basis behind coding, analog modems, ADSL, multitone modulation (DMT), OFDM, and adaptive modulation and coding.
OFDM (DMT) is the modulation for the IEEE 802.11 (Wi-Fi), 4G-LTE as well as ADSL and VDSL, and it is one of the strongest candidates for the modulation technique to be used in 5G.We present an in-depth discussion of multitone modulation, DMT, OFDM, OFDMA, Scalable OFDMA and SC-FDMA. Then we will discuss some of the OFDM-based modulations which are also being considered for 5G.

  • Introduction to Shannon Information Theory
  • Channel Capacity for Ideal and General Gaussian Channels

Multitone-DMT

  • Discrete Multitone (DMT) - Implementation
  • The Twisted Pair Channel
  • Multitone (DMT) over the Twisted Pair Channel (ADSL and VDSL)

OFDM-Orthogonal Frequency Division Multiplexing

  • OFDM - for Broadband Wireless Communications
  • Adaptive Modulation and Coding Techniques
  • Physical Interfaces of IEEE 802.11 (Wi-Fi), 4G-LTE and IMT-Advanced (4G)
  • OFDMA as a Multiple Access Technique
  • Scalable OFDMA
  • SC-FDMA (Single-Carrier FDMA-4G-LTE)
  • OFDM-MIMO

Thursday
5G-Proposals based on OFDM

  • Offset QAM in OFDM Systems
  • Universal Filtered Multi-Carrier (UFMC)
  • Filter-Bank Multi-Carrier (FBMC)
  • Generalized Frequency Division Multiplexing (GFDM)
  • Filtered OFDM (f-OFDM)

Trellis Coding, Convolutional Coding and The Viterbi Algorithm
We continue with a description of trellis coded modulation concepts and convolutional coding, including a discussion of the Viterbi Algorithm. We also include the topic of interleaving for improving the performance of modulations on Rayleigh fading channels.

  • The Viterbi Algorithm (VA)
  • Ungerboeck Trellis Coding
  • The VA Equalizer
  • Interleaving for Rayleigh Fading
  • Performance on the Rayleigh Fading Channel
  • Convolutional Coding

"Faster-Than-Nyquist (FTN) Signaling"

  • What is FTN?
  • What is its performance?
  • Candidate for 5G

Turbo-Coding-Introduction
A topic of increasing importance is the turbo-coding (iterative decoding) concept and its use in areas such as antenna diversity, equalization and OFDM.

  • Turbo Coding
  • Iterative Decoding Techniques
  • Turbo-Equalization
  • Introduction to LDPC Codes

Capacity of Rayleigh Fading Channels
Shannon's work has been updated to include bounds on the performance of Rayleigh fading channels. This work led to the concept of MIMO and space-time (Alamouti) coding.

  • Bounds on Communications for Fading Channels
  • OFDM-MIMO-Coding
  • Space-Time Coding
  • Alamouti Coding
  • Multi-User Diversity Techniques

Friday
Continuous Phase Modulations (CPM) 
CPM signals (e.g., GMSK) are constant envelope, bandwidth efficient modulations, suitable for use with nonlinear power efficient, transmitting power amplifiers. These modulations are used in GSM and deep space communications.

  • Continuous Phase Modulation (CPM)
  • Gaussian MSK (GMSK)
  • Tamed FM (TFM)
  • Generalized TFM (GTFM)
  • Constant Envelope OFDM
  • Adjacent Channel Crosstalk in CPM Signals

Non-Coherent Detection

  • DPSK
  • FM Detection of CPM Signals-Bluetooth, DECT

New Modulation Proposals for 5G

  • OTFS-Orthogonal Time Frequency Space Modulation
  • Wave Modulation
  • Spatial Modulation

CDMA and WCDMA
We continue with a discussion of  CDMA and WCDMA, and describe the radio interfaces of the IMT-2000 WCDMA system, as well as the physical interface of IS-95.

  • The RAKE Receiver
  • Pseudo-Random Sequences
  • Power Control
  • Intra and Inter-Cell Interference and Capacity
  • IS-95 Physical Interface
  • IMT-2000 WCDMA Physical Interface: Walsh and OVSF Functions

Summary and the Future

citattecken

Said about hte course from previous participants:
"Practical examples and exercises."
"A lot of interaction, good depth in material. Practical measurements on hardware."
"Clear slides and booklet. Clear explanations."
"The level of the course has been chosen properly matched with the audience level."
"Instructor with plenty of real-life practical knowledge."



CEI-Europe AB, Teknikringen 1F, SE-583 30 Linköping, Sweden Phone +46-13-100 730 Fax +46-13-100 731 cei@cei.se