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Arunabha Ghosh, Lead Member of Technical Staff in the Radio Technology Group at AT and T Labs, researches MIMO wireless communication for 4G systems. Jun Zhang researches the capacity and performance of multi-cell processing techniques, as part of his work towards a Ph.D. at University of Texas, Austin. Jeffrey G. Andrews, Associate Professor at the University of Texas at Austin, directs the Wireless Networking and Communications Group. He previously developed CDMA systems at Qualcomm. Rias Muhamed, Director of Business Development at AT and T, develops new wireless and multimedia communications services. Ghosh, Andrews, and Muhamed co-authored Fundamentals of WiMAX.