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Cognitive radio technology enables more flexible and efficient spectrum utilization, and leads to new challenges and opportunities for designing next generation wireless networks. 
We study various interference management techniques such as power control, SINR optimization, and link scheduling for wireless networks.
We design new resource allocation schemes for video communications over wireless networks by intelligent exploitation of content, time, and frequency diversities.
Digital subscriber line (DSL) technology is one of the main choices for wired broadband access networks. We propose distributed spectrum management algorithms that achieve a near optimal capacity region with low complexities for next generation DSL networks.
Cooperative communications take advantage of the broadcast nature of wireless channels, use relay nodes as virtual antennas, and thus realize the benefits of multiple-input-multiple-output communications in situations where physical multiple antennas are difficult to deploy.
Key management is important in supporting secure communications in light weight wireless ad hoc networks

by Dr. Radut