SSCS Guest Lecture: Integrated True-Time-Delay based Large-Scale Arrays for Spatially Diverse Applications
IEEE SSCS Vancouver Chapter Guest Lecture:
Integrated True-Time-Delay based Large-Scale Arrays for Spatially Diverse Applications
Future millimeter-wave networks (mmW-nets) will operate in the upper mmW frequency band where more than 10 GHz of bandwidth can be used to meet the ever-increasing demands. Their realization will require addressing a completely new set of challenges including wider modulated bandwidths, larger antenna array sizes, and higher cell density.
These new system requirements demand fundamental rethinking of signal processing and radio architectures including major breakthroughs in radio front-end architectures to enable wideband mmW-nets. This talk presents integrated true-time-delay (TTD) arrays to overcome
many of the challenges in phased array antennas (PAA) for wideband interference suppression and data communication. We introduce discrete-time switched-capacitor circuits to achieve the widest tunable range-to-resolution ratio necessary for next-generation communication and beam acquisition. Integral to the proposed circuit is an analog-multiply-and-accumulate processor that incorporates a reconfigurable phase-interpolator for precise digitally tunable delays and multiplication of the inputs signal to an orthogonal matrix. Example measurements with 100MHz modulated bandwidth will be shown for a multi-channel TTD array at baseband with 5ns/5ps range-to-resolution ratio. We will conclude the talk with insight into our ongoing research on time-based circuits and systems to achieve GHz modulated bandwidth and development of a closed-loop optimization testbed incorporating GHz data converters and multi-parameter optimization algorithms.
Date and Time
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- Date: 18 Nov 2019
- Time: 10:30 AM to 11:55 AM
- All times are (GMT-08:00) US/Pacific
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- 2356 Main Mall
- University of British Columbia Electrical Engineering
- Vancouver, British Columbia
- Canada V6T1Z4
- Building: Macleod Building
- Room Number: 418
- Click here for Map
- Starts 01 November 2019 01:54 PM
- Ends 18 November 2019 10:30 AM
- All times are (GMT-08:00) US/Pacific
- No Admission Charge
Speakers
Prof. Subhanshu Gupta, Washington State University
Biography:
Subhanshu Gupta received the B.E. degree from the National Institute of Technology (NIT), Trichy, India, in 2002, and the
M.S. and Ph.D. degrees from the University of Washington in 2006 and 2010, respectively. From 2011 to 2014, he was with the
RFIC Group,
Maxlinear Inc., where he was involved in design of silicon transceivers and data converters. He is currently an Assistant
Professor of electrical engineering and computer science with Washington State University. He is a Senior Member of the IEEE
and a recipient of the Analog Devices Outstanding Student Designer Award in 2008 and IEEE RFIC Symposium Best Student
Paper Award (3 rd position) in 2011. His research interests include analog-to-digital converters, wireless transceivers, sparse
signal processing, and stochastic hardware optimization.