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Dr. Muriel Medard?s paper on channel estimation in wireless communications has been widely credited with bringing a groundbreaking perspective to wireless communications theory, with important implications for future research and development. Dr. Medard?s paper provides valuable insight into the limitations of wireless communication, and suggests new strategies. Credited by her colleagues with changing the fundamental understanding of communication difficulties over wireless, time-varying channels, the paper shuns the assumption of perfect channel knowledge or a quasi-static channel. Instead, Dr. Medard uses upper and lower bounds on mutual information to analyze capacity and reliability under true channel conditions, with continuous, unknown variation. Dr. Medard goes on to show that in both single and multi-user communications, capacity degradation is the result of the uncertainty in estimating the channel, rather than the channel?s time-varying nature. In addition, the paper demonstrates that in multi-user communications, some form of multi-user detection improves capacity, even with imperfect estimates of the other users? channels. As an Assistant Professor in the Department of Electrical Engineering and Computer Science at MIT, Dr. Medard has done significant research on reliable communications, particularly in optical and wireless networks. She was previously an Assistant Professor of Electrical and Computer Engineering and a member of the Coordinated Science Laboratory at the University of Illinois Urbana-Champaign. From 1995 to 1998, she worked in the Optical Communications and Advanced Networking Groups at the Massachusetts Institute of Technology (MIT) Lincoln Laboratory. Her other research interests include high-speed access networks,� optical network robustness, wireless/optical interfacing, wideband wireless channels, and the capacity of time-varying and packetized wireless channels. Muriel Medard was born 1 February 1968. She was awarded a B.S. in Mathematics and a B.S. in Electrical Engineering and Computer Science in 1989, and a B.S. in Humanities, Russian Studies in 1990, all from MIT. She received an M.S. in Electrical Engineering in 1991, and a Sc.D. in Electrical Engineering in 1995, also from MIT. Dr. Medard is a member of the IEEE. She holds 5 patents and has written many papers on the subject of communications and networks. In 1991, she was awarded the National Science Foundation Career Award.�