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Wireless Seminar (Hybrid): Beam Squinting in THz Systems
September 21, 2022 at 11:00 AM to 12:00 PM
| Location: | 4359 Mackenzie |
| Audience: | Anyone |
| Key Contact: | Jenese nugent |
| Contact Email: | info@sce.carleton.ca |
| Contact Phone: | 613-520-2600 x 8337 |
Speaker: Professor Pawel Dmochowski, Victoria University of Wellington
Abstract:
Terahertz (THz) Band (0.1 – 10 THz) communications is seen as one of the key enabling technologies to satisfy the demand for increased data rates and improved coverage in 6G systems and beyond. Among the many challenges of moving to THz frequencies is antenna beam design, including the problem of beam squinting – the deviation in the steering angle across the operating bandwidth. This phenomenon, caused by approximating time delay by a (frequency independent) phase-shift in classical phased array designs, becomes significantly more pronounced as we move to the wide bandwidth offered by THz communications.
In this talk we will discuss the fundamentals of beam squinting as they pertain to analog beamforming in THz systems. We will show that the traditional solution of using time-delays (to achieve a frequency-dependent phase shift) no longer offers an advantage over a phased array implementation when one considers a practical, quantized, implementation. A non-uniform Lloyd-Max quantization is proposed as a possible solution, and is shown to be effective when moderate-high levels of quantization. Open problems in the area of beam design are finally presented.
Speaker Bio:
Pawel Dmochowski was born in Gdansk, Poland. He received a B.A.Sc (Engineering Physics) from the University of British Columbia, and M.Sc. and Ph.D. degrees from Queen’s University, Kingston, Canada. He is currently an Associate Professor in the School of Engineering and Computer Science at Victoria University of Wellington. Pawel is a Senior Member of the IEEE and has served as an Editor for IEEE Communications Letters and IEEE Wireless Communications Letters. His research interests include mmWave, THz communications, Massive MIMO and Cognitive Radio systems, with a particular emphasis on statistical performance characterisation.
Zoom Details: Wireless Seminar (Hybrid): Beam Squinting in THz Systems.