Research Projects

Distributed MIMO for Cooperative Cognitive Radio Networks

Vinayak Nagpal and Borivoje Nikolic

Collaborative cognitive radio networks can achieve higher performances by utilizing the spatial dimension efficiently [1]. The importance of the spatial dimension has increased further in light of recent results [2], which have shown that the total capacity of wireless ad hoc dense networks can scale linearly with the number of nodes using intelligent node-cooperation and distributed MIMO. Realizing a practical wireless network that uses spatial diversity through either distributed MIMO or distributed beam-forming poses several challenges, especially those of synchronizing the nodes. We are working towards understanding these challenges and finding ways to address them.

[1]

A. S. Y. Poon, "Use of Spatial Dimension for Spectrum Sharing," PhD thesis, UC Berkeley, spring 2004.

[2]

A. Ozgur, O. Leveque, and D. Tse, "Hierarchical Cooperation Achieves Optimal Capacity Scaling in Ad Hoc Networks," IEEE Transactions on Information Theory, Issue 10, October 2007.