SSCS Guest Lecture: Integrated True-Time-Delay based Large-Scale Arrays for Spatially Diverse Applications
November 18 @ 10:30 am - 11:55 am
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.
Bldg: Macleod Building
2356 Main Mall
University of British Columbia Electrical Engineering
Vancouver, British Columbia