Register for either 1/2 day or full day of tutorials. Full day allows selection of 1 morning and 1 afternoon tutorial of your choice. Half day allows either 1 morning or 1 afternoon tutorial of your choice. Make your selection real time at the conference-- you do not have to select a specific tutorial in advance.
Tutorial 1 . 1 . 1 . 1 Smart Antennas for Wireless Systems
In this tutorial we will discuss current and future antenna technology for wireless systems and the improvement that smart and adaptive antenna arrays can provide. We will describe standard cellular antennas, smart antennas using fixed beams, and adaptive antennas for base stations, as well as antenna technologies for handsets. We will then show the potential improvement that these antennas can provide in second and third generation wireless systems, including range extension, multipath diversity, interference suppression, and capacity increase. Theoretical, computer simulation, experimental, and field trial results will be presented.
Tutorial 1 . 1 . 3 . 1 High Speed Wireless Data for Internet Applications
Cellular radio, personal computers and Internet services have been extremely successful recently. It is now timely to consider a synergistic combination of wireless, computer and Internet technologies to provide high-speed wireless data for Internet applications. This tutorial first reviews emerging wireless data technologies. The evolution path from 2nd to 3rd generation systems and standards will be discussed, followed by a detailed investigation of TDMA and CDMA techniques for the 3G wireless data for Internet applications, including key technologies used in Enhanced Data-rates for GSM Evolution (EDGE) and wideband CDMA (WCDMA). Finally, we introduce an OFDM based system with even higher data rates for future multimedia applications.
Tutorial 1 . 2 . 1 . 1 GSM-R * The new Mobile Radio Standard for Railways.
Based on the GSM Standard a new generation of mobile radio communication for railways has been developed. Integrated services for voice and data transmission based on the functional requirements of the end user have been standardised in European bodies like ETSI. This tutorial will outline the evolution of GSM towards GSM-R and will present details on the specifications and the results of recent tests. The requirements of modern railway operation include highly available service for voice and data communication, PMR features for geographical information distribution and dedicated quality of service parameters. The special railway environment, e.g. high speed up to 380km/h, and the time critical applications present only two challenges for the new system. The activities have been concentrated in a European project for specification and standardisation (EIRENE) and a project for development and validation (MORANE). Details on these projects will be given during the tutorial. Special attention will be given to ASCI (Advanced Speech Call Items) features, Network Planning and Optimisation under railway specific environment, System Performance, Frequency issues and Roaming aspects.
Tutorial 1 . 2 . 3 . 1 Automotive Electrical Power Systems: Current Status & Future Trends
Increasing use of electrical power to drive vehicle subsystems, which historically have been driven by a combination of mechanical, electrical, hydraulic, and pneumatic power transfer systems, is seen as a dominant trend in advanced vehicle power systems. This is the concept of More Electric Vehicles (MEV). Recent advancements in the areas of power electronics, fault tolerant electrical power distribution systems, electric drives, control electronics, and microprocessors are already providing the impetus to improve the performance of automobile electrical systems and their reliability. As a result, the MEV concept is seen as the direction of automotive power system technology. On the other hand, there is a growing interest in Hybrid Electric Vehicles (HEV) due to environmental concerns. Expansion of MEV concept to HEV leads to More Electric Hybrid Vehicles (MEHV). In MEHV, high power hotel and ancillary loads associated with the more electric environment present a challenge not only by acting as significant dynamic loads on the traction power system, but also by requiring a power conversion and distribution system of their own. Some of the loads considered are power steering, anti-lock braking, air-conditioning, throttle actuation, ride-height adjustment, rear-wheel steering, electrically heated catalyst, and active suspension systems. In this tutorial, we will address the fundamental issues in automotive power systems. Furthermore, a brief description of the conventional automotive electrical systems and electric and hybrid electric vehicles including series and parallel hybrid propulsion systems will be given. Their disadvantages, scope for improvement, and role of electronics and microprocessors will be explained. Moreover, present and future electrical loads will be described in detail. Advanced MEV and MEHV distribution system architectures will be presented as well. We will also address different methods for modeling, analysis, and stability assessment of the system in transient and steady state. In addition, different modes of instability including negative impedance instability will be covered. Finally, we will conclude with a brief outline of the advancements to be made in the future. The future MEV power system will most likely be a single voltage bus (42V DC) with provision for hybrid and multi-voltage level distribution with separate buses for power and communications.
Tutorial 1 . 3 . 1 . 1 Mobile Ad Hoc Networks
A mobile ad hoc network is a collection of mobile wireless nodes that can dynamically form a network without using any pre-existing network infrastructure. In general, routes between nodes in an ad hoc network may include multiple hops. Due to the potential ease of deployment, many practical applications have been conceived for ad hoc networks, including personal area networking, home networking,search-and-rescue operations, and battlefield applications.
When designing mobile ad hoc networks, several interesting and difficult problems arise due to shared nature of the wireless medium, limited transmission range of wireless devices, node mobility, and battery limitations. This tutorial will present an overview of issues related to medium access control (MAC), routing, and transport in mobile ad hoc networks. The tutorial will also include a discussion of approaches for reducing energy consumption by nodes in a mobile ad hoc network. Some security-related issues will also be considered.In addition, the tutorial will discuss implementation-related problems, and mechanisms for integrating a mobile ad hoc network with existing wired networks. Finally, the tutorial will also present an overview of some standards activities related to ad hoc networking.
Tutorial 1 . 3 . 3 . 1 TCP/IP over Wireless Networks
Transport Control Protocol (TCP) is widely used in the Internet for reliable communication. The emerging wireless networks pose new challenges to TCP in terms of performance, requiring analysis and solutions. The tutorial initially presents the basic principles of the TCP protocol. Then discusses the TCP performance issues and some solutions to improve TCP performance in wireless environments. The tutorial also provides a discussion on HyperText Transfer Protocol (HTTP) and TCP interaction for a web browsing application in a mobile environment. Some basic knowledge of communication protocols will be assumed.
Tutorial 1 . 4 . 1 . 1 Orthogonal Frequency Division Multiplexing for Wireless Communications
Orthogonal frequency division multiplexing (OFDM) has been shown to be an effective technique to combat multipath fading in wireless communications. This approach has been chosen as the standard for digital audio broadcasting and terrestrial TV in Europe and has been proposed for several outdoor and indoor high-speed wireless data applications. This tutorial initially presents the basic principles of OFDM. Then we discuss the problems and some of the potential solutions to the practical issues in implementing such a system. These include techniques for peak-to-average power ratio reduction, time and frequency synchronization, channel estimation, adaptive antenna arrays and transmitter diversity. We conclude with a discussion of current and proposed systems.
Tutorial 1 . 4 . 3 . 1 TUTORIAL: WIRELESS OFDM TRANSCEIVERS
The choice of orthogonal frequency division multiplexing (OFDM) as the underlying technology for the IEEE 802.11 and HIPERLAN-2 wireless LAN standards is a breakthrough for wireless OFDM. Wireless OFDM modulation allows to transmit large data rates over a multipath fading channel with low complexity transceivers. In this tutorial we present the implementation aspects of wireless OFDM transceivers. We give an overview of transceiver structures and next discuss each of the functional blocks in more detail: Time adjustment, Frequency synchronization, (Inverse) Fast Fourier Transform, Crest factor reduction, Equalization, Channel estimation. We also present an extensive study on the effects of front-end non-idealities, including non-lineair power amplifiers, phase noise, in-band and quadrature mismatch, etc., on wireless OFDM system performance. Finally, we conclude the tutorial with an example of a real wireless OFDM transceiver design.
Tutorial 1 . 5 . 1 . 1 EDGE "Third Generation Wireless System"
EDGE (Enhanced Data rates for Global Evolution) is an ITU-approved third generation (3G) TDMA wireless system. EDGE enables a high-rate packet data service with rates comparable to those offered by WCDMA and cdma-2000. By offering a common evolutionary path for GSM and ANSI-136 (two dominant 2G systems), EDGE has the potential of becoming a truly global wireless system. EDGE contains innovative modulation and radio link control mechanisms which enable a high-speed packet data service with enhanced system capacity and link performance. Using this packet data mode, EDGE provides high-speed wireless access to the internet (e.g. web browsing and e-mail). EDGE will enable system operators to exploit the foreseen explosive growth of the wireless internet.
The following topics will be covered in the tutorial:
This tutorial will provide the attendees with a good understanding of the physical layer and radio link control layer of EDGE, along with an overview of protocols and services. We will focus on the logic behind the design of the EDGE system, and we will try to explain WHY various parts of the EDGE standard were chosen. The emphasis in this tutorial will not be on the details related to implementation of EDGE, rather, the emphasis will be on understanding the trade offs that led to the design of the system.
Tutorial 1 . 5 . 3 . 1 Wireless E-Commerce
The developments in the wireless communication, Internet and technology convergence has brought new opportunities for the mobile operators apart from their traditional voice communication. The carriers can offer a range of application services including mobile commerce migrating to the new technology. The new pricing model as well as business model will bring profitability to the carriers. The carriers have to go for new partnerships with different content providers, carriers, merchants, and banks to exploit the market. The wireless commerce will have its own role but can*t go for replacing the fixed commerce. The B-2-C will be the major transaction for the Wireless Commerce. The article gives an overview of the emerging wireless e-commerce.
Tutorial 1 . 6 . 1 . 1 Turbo Codes
The invention of turbo codes has been a significant development for the future of application control coding. An overview of the technology will be presented.
Tutorial 1 . 6 . 3 . 1 INTERFERENCE ANALYSIS AND SUPPRESSION TECHNIQUES FOR WIRELESS COMMUNICATIONS
Interference is a ubiquitous property of the environment in which communication systems exist, being caused not only by external means (neighboring systems) but also by non ideal mechanisms utilized in the process of communications. This tutorial seeks to cover all modern tools of interference analysis for wireless communication systems and presents the most relevant ways for reduction and / or cancellation of interference. This work will be an essential set of material for graduate students, researchers, practicing engineers and instructors in the general field of wireless communication systems.