Performance of high speed, low power mobile ad-hoc UWB networks

Contact: Bozidar Radunovic

The wireless LAN physical layer based on Ultra-Wideband (UWB) [1,2,3,4] radio technology shows very promising capabilities. A key feature is the possibility to provide high speed and low multi-user interference with very little power.

There are several current proposals for physical model standard of UWB networks. One proposal [3], backed by Intel, is based on OFDM type of frequency divisioning. Another [4], backed by Motorola, is based on code divisioning (CDMA). The third one [2], based on pulse position modulation (PPM) is backed by US army.

The goal of the project is to compare performances of these three main proposals. We have to derive a simple discrete time channel model for each of these proposals, and to evaluate the information theoretic capacity of each of the models for a realistic values of parameters. Next, we will perform the same approach for a more realistic networks and account for interference produced by other emitting nodes.

The project requires a background in information theory and experience with MATLAB.


  • 1. Walter Hirt and Domenico Porcino. Ultra-wideband radio technology: Potential and challenges ahead. IEEE Communications Magazine, pages 66-74, July 2003
  • 2. Moe Z. Win and Robert A. Scholtz. Ultra-wide bandwidth time-hopping spread-spectrum impulse radio for wireless multiple-access communications. IEEE Transactions on Communications, 48(4):679-691, April 2000
  • 3. IEEE 802.15 WPAN High Rate Alternative PHY Task Group 3a. Multi-band OFDM Physical Layer Proposal. IEEE 802.15-03/267r5, July 2003.
  • 4. IEEE 802.15 WPAN High Rate Alternative PHY Task Group 3a. Proposal DS-CDMA. IEEE 802.15-03/334r3, Sep 2003.


Understand the fundamentals of the future wireless communication technologies, work with the performance optimization and evaluation techniques on a real world examples.


Network performance analysis