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Digital Beamforming with Bandpass ADCs and Bitstream Processing: Presented by Michael Flynn

9:00 AM EST
Webinar - Online
Aeisha VanBuskirk –
Michael Flynn
Abstract: Multi-antenna systems and beamforming play a critical role in mm-wave communication by counteracting path loss. In addition, spatial filtering and multiplexing further increase channel capacity. Moreover, large arrays are desirable, as an arrayed system's SNR and spatial selectivity improve with more extensive array size. In addition, digital arrays offer better flexibility, reconfigurability, and beam accuracy and enable efficient multi-beam generation.
Bitstream processing (BSP) is an emerging technique for power and area-efficient digital beamforming. An array of bandpass continuous-time ADCs digitizes high IF signals, relaxing anti-alias requirements and eliminating the need for analog IQ down conversion. BSP directly operates on the undecimated ADC quantizer outputs to reduce the power consumption and die area of digital processing. We demonstrate the potential of this approach in a single-chip 16-element digital beamformer. We also show that BSP can facilitate both true-time-delay and phased array beamforming.

Biography: Michael P. Flynn received the Ph.D. degree from Carnegie Mellon University in 1995. From 1988 to 1991, he was with the National Microelectronics Research Centre in Cork, Ireland. He was with National Semiconductor in Santa Clara, CA, from 1993 to 1995. From 1995 to 1997, he was a Member of Technical Staff with Texas Instruments, Dallas, TX. During the four-year period from 1997 to 2001, he was with Parthus Technologies, Cork, Ireland. Dr. Flynn joined the University of Michigan in 2001, and is currently the Fawwaz T Ulaby Collegiate Professor of Electrical and Computer Engineering and Professor of Electrical Engineering and Computer Science.

Michael Flynn is a 2008 Guggenheim Fellow. He received 2020 Rackham Distinguished Graduate Mentoring Award and the 2016 University of Michigan Faculty Achievement Award. He is a recipient of the 2020 Intel Outstanding Researcher Award. Flynn received the 2011 Education Excellence Award and the 2010 College of Engineering Ted Kennedy Family Team Excellence Award from the College from Engineering at the University of Michigan. He received the 2005-2006 Outstanding Achievement Award from the Department of Electrical Engineering and Computer Science at the University of Michigan. He received the NSF Early Career Award in 2004.

Dr. Flynn was Editor-in-Chief of the IEEE Journal of Solid State Circuits from 2013 to 2016. He is a former Distinguished Lecturer of the IEEE Solid-State Circuits Society. He served as Associate Editor of the IEEE Journal of Solid State Circuits (JSSC) and of the IEEE Transactions on Circuits and Systems. He served on Technical Program Committees of the International Solid State Circuits (ISSSC), the Symposium on VLSI Circuits, the European Solid State Circuits Conference (ESSCIRC) and the Asian Solid-State Circuits Conference (ASSCC). He was sub-committee chair for data conversion at ISSCC from 2018 to 2022.