Course #39

Digital Mobile and Wireless Communications:  The Radio Interface for 2G, 3G, and Beyond

New date to be decided. 
Available as a corporate-exclusive / tailored course at your site.
Please contact Ms Elisabet Larsson for an offer: cei@cei.se
Phone: +46-122-17570   Fax: +46-122-14347

INSTRUCTOR
Professor Irving Kalet, Technion, Haifa, Israel, and Columbia University, New York, USA

TECHNOLOGY FOCUS
Mobile and broadband wireless communications are now in the era of 3G IMT-2000, Hiperlan2, IEEE 802.11 and 16 Systems. One important element of these systems is the radio interface, or physical layer, which includes the modulation, coding, equalization, diversity, and multiple access techniques. These techniques determine the capacity as well as the implementation complexity of the wireless systems. New concepts which have the potential of greatly improving the bandwidth and power efficiency of these systems include BLAST-MIMO antenna systems, OFDM and OFDMA, adaptive modulation and coding,  iterative decoding techniques, space-time coding, OFDM, WCDMA multiple access techniques, and Ultra-Wideband Radio. 

COURSE CONTENT AND OBJECTIVE
The goal of this course is to provide an in-depth understanding of the major building blocks of modern digital mobile and wireless communication systems.

Monday 

Cellular Communications and the Rayleigh Fading Channel

• A "Bit" of History
• The Cellular Concepts: Frequency reuse, handoff, the near-far problem
• The Rayleigh Fading Channel
• Multipath Rayleigh Fading, Delay Spread, Frequency-Selective Fading 

The Analog and Digital Modulation Concepts 

Baseband Nyquist Signaling

• Optimum Filtering
• Linear Equalization
• Duobinary Signals 
• The MLSE Concept

Tuesday 

Optimum Detection and Modulation Definitions

• Signal Space Concepts
• Classic Modulation Techniques 
• BPSK, QPSK, MPSK, p/4-QPSK
• QAM, BFSK, MFSK
• The Correlation Receiver 

The Fading Channel, Space Diversity, SISO, SIMO, MIMO and BLAST

We evaluate the error probability for modulations transmitted over a fading channel. Classic antenna diversity, or space diversity, is used 
to improve the performance. 

• Detectability Performance
• Classic Antenna Diversity 

The MIMO-BLAST Concept 

The MIMO-BLAST concept allows us to greatly improve the bandwidth efficiency of channels with multipath fading. 

• MIMO Concept
• BLAST
• Smart Antennas

MSK-Type Signals 

QPSK, SQPSK, pi/4-QPSK and MSK are essentially constant envelope modulations, which are used in many satellite and wireless systems.

• QPSK, SQPSK, MSK, SFSK
• ACI
• pi/4-QPSK

M-ary Signals

• Optimum Detection
• MPSK (EDGE), QAM, MFSK

Wednesday 

Information Theory

We discuss the Shannon information theoretical bounds on communication which led to the field of coding, multitone modulation (DMT), OFDM and adaptive modulation and coding.

• Why Code?
• Multitone Techniques
• DMT Implementation

Orthogonal Frequency Division Multiplexing

OFDM is now being implemented in broadband wireless systems such as HIPERLAN2 and the IEEE 802 systems.

• OFDM
• Adaptive Modulation and Coding Techniques
• Hiperlan2, IEEE 802.11a and IEEE 802.16a
• OFDMA as a Multiple Access Technique 
• OFDM-MIMO 

Coding Techniques

We focus on the traditional coding, or time-diversity, techniques used in all major wireless systems

• Block Coding
• Interleaving for Rayleigh Fading Channels
• Viterbi Algorithm
• Trellis Coding
• Convolutional Coding
• Coding for Fading Channels 

Thursday 

Turbo Coding - Iterative Decoding

• Turbo codes and LDPC codes approach the famous Shannon limits on communications. 
• Turbo Codes
• Iterative Decoding Combined with Equalization or OFDM 

Information Theory Bounds on the Performance
of Rayleigh Fading Channels

Shannon's original work has been updated to include bounds on communications over fading channels.This has led to the concept of MIMO. 

• MIMO, MISO, SIMO and SISO Systems
• Diversity Gain and Spatial Multiplexing

Space-Time Coding and Multi-user Communications

The Alamouti space-time technique and multi-user techniques are becoming a standard in many wireless systems.

• Alamouti Coding
• Calderbank Coding
• OFDM-MIMO-Coding 
• Multi-User Performance
• Opportunistic Beam-Forming 

Continuous Phase Modulation, CPM

CPM signals are bandwidth efficient, constant envelope modulations which are very suitable for use with power efficient, nonlinear transmitting power amplifiers. 

• Constant Envelope Signals
• GMSK (GSM, DCS), TFM, GTFM 
• FM Receiver (DECT) for the Detection of CPM Signals

Friday 

Cellular Communications - The Radio Interface

• FDMA, TDMA Systems 
• The Radio Interface of GSM, GPRS, EDGE and IS-136

CDMA and WCDMA Multiple Access

• The Concept
• Pseudo-random Sequences
• RAKE Receiver
• Pilot Channels
• Power Control
• Voice Activity Factor
• Intra- and Inter-cell Interference
• Capacity

The Radio Interface of IS-95 and 1 xEV

• The Walsh Functions
• Pseudo-Random Sequences

IMT-2000 WCDMA and EDGE 3G Standards

• IMT-2000 WCDMA - 3.84 Mchips/sec Standard
• Orthogonal Variable Spreading Factor Functions (OVSF)
• Gold Codes 

Ultra-Wideband Radio

Ultra-Wideband (UWB) or Impulse Radio is a new idea for multiple access techniques for the next generation mobile systems. 

Regular Course Fee: EUR 

Early Registration Course Fee: EUR 
This applies to firm registrations received 2 months before course start. 

University Student and Faculty Rate:
Two university participants are welcome to attend for one course fee if payment is to be made from university funds.

Deliverables:
The course fee covers tuition, course material, and the day conference packages (morning/afternoon refreshments, etc., however, no lunches in Davos) paid on your behalf to the course venue. Accommodation is not included.