Vehicular & Wireless Technologies



  "Space-Time Communications" by Richard Wesel, sponsored by the IEEE Vehicular Technology Society

In the context of a rich scattering environment, multiple antennas at the transmitter and receiver provide a capacity increase over single-antenna transceivers that is linear in the minimum of the number of transmit and receive antennas. This seminal result of Foschini & Gans and Teletar opened the new field of space-time communications. In this course we introduce the key concepts of space-time communications, focusing on transmission in a quasistatic channel.  This introduction assumes that a good estimate of channel state information is available at the receiver but not the transmitter.

After completing this course you have an understanding of:

  • Capacity potential provided by multiple antennas.
  • Layered transmission systems such as DBLAST.
  • The Alamouti construction and the theory of orthogonal designs.
  • Space-time trellis code design for good average performance in Rayleigh fading.

Richard D. Wesel is an Associate Professor with the UCLA Electrical Engineering Department.

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"Wireless OFDM" by Alexander Haimovich, sponsored by the IEEE Communications Society

The expansion of information services in the last decade has affected the way we live and work. Notwithstanding dampened expectations that the Internet will soon take over commerce, education and other aspects of daily life, the Internet continues to grow faster than any other global infrastructure in history. Alongside the Internet, we have witnessed a phenomenal growth in wireless communications. Third generation (3G) cellular service is being launched in various parts of the globe. Supported by timely updates in the 802.11/HIPERPLAN standards and by affordable prices, wireless local area networks (W-LAN) equipment is becoming widespread.

Increasingly, the driving force behind future growth in the telecommunications industries is seen to be the broadband wireless access to the Internet and wireless data connections to mobile users. However, economical and architectural considerations limit the ability of 3G cellular to provide tetherless Internet connections to densely packed users. Hybrid approaches utilizing WiMAX, mesh networks, and WLAN or Wireless Personal Area Networks (WPAN) are being proposed and deployed. The ever-increasing appetite for capacity and data rates is driving the research and development of 4G wireless access technologies.

This course will delve into Orthogonal Frequency Division Multiplexing (OFDM) with particular attention given to problems arising from wideband applications, for example, the problem of peak-to-average power ratio and remedies.

  • After completing this course you should be able to develop an understanding of:
  • Optimizing Transmission of OFDM: Pulse Shaping, Guard Time
  • Coded OFDM
  • Peak Power Problem and Remedies
  • Multicarrier CDMA

Alexander Haimovich, Ph.D., Professor of Electrical and Computer Engineering at the New Jersey Institute of Technology, Newark, USA. Dr. Haimovich has served as a Director of the New Jersey Center for Wireless Telecommunications, Newark, USA. He has 25 years of R&D experience in communications and radar, about half of this time in industry and the other half in academia.

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