Harish Viswanathan is Head of the Radio Systems Research Group in Nokia Bell Labs. He leads a global team of researchers investigating various aspects of wireless communication systems, and in particular, 6G. He joined Nokia Bell Labs in 1997 and has worked on multiple antenna technology for cellular wireless networks, mobile network architecture, and M2M. He holds more than 50 patents and has published more than 100 papers. He is a Fellow of the IEEE and a Bell Labs Fellow.