American University of Beirut Seminar

Non-Parametric Methods for Mitigating Interference in OFDM Receivers

Prof. Brian L. Evans

Engineering Foundation Professor
Dept. of Electrical and Computer Engineering
Wireless Networking and Communications Group
The University of Texas at Austin, Austin, Texas USA

In collaboration with PhD students Ms. Jing Lin and Mr. Marcel Nassar

Thursday, August 4, 2011, 12:30-1:30pm, Bechtel Building


Interference Modeling and Mitigation Project


In many cellular, wireless local area network (WLAN) and powerline communication systems, users experience interference from other users and switching electronics that is stronger than thermal noise. In such interference-limited channels, the assumption that additive noise is Gaussian breaks down, which in turn may require redesign of all receiver subsystems.

After describing interference sources in the above systems, we model the interference statistics. We propose ways to reduce interference in orthogonal frequency division modulation (OFDM) receivers as found in cellular, WLAN, and powerline communication systems. One method is based on a sparse representation of the interference observed in null and pilot tones. The other method jointly estimates data and interference. Using either method allows the rest of the signal path in the receiver to remain unchanged.


Prof. Evans conducts research in signal processing and communication systems. His research group develops theory and algorithms, as well as design methods and full-system testbeds. He has published more than 200 peer-reviewed journal and conference papers, and graduated 19 PhD and 9 MS students. He was elevated to IEEE Fellow "for contributions in multicarrier communications and image display". In 1997, he received a US National Science Foundation CAREER Award. In summer 2005, he taught a real-time digital signal processing course at AUB.

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