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Computing Science and Mathematics
Seminars, 2021/2022

Autumn 19 image

Seminars will take place via Microsoft Teams, with a meeting link to be shared via the seminar-announce emails. Unless otherwise stated, from 15.00 to 16.00 on Friday afternoons during semester time, followed by informal discussions.

If you would like to give a seminar to the department in future or if you need more information,  
please contact the seminar organisers, or .

Spring 2021

Date Speaker Title/Abstract
17 September

24 September
Wen-shin Lee Sparse Interpolation: design sparse antenna arrays for estimating directions of arriving signals

Estimating the directions of simultaneously arriving signals plays an important role in radar, remote sensing, radio frequency interference mitigation, wireless networks, machine perception of unmanned aerial vehicles or self-driving cars. In signal processing, antenna array systems have been designed to solve the problem of estimating the direction of arrival (DOA). A main constraint in designing regularly spaced antenna systems is the spatial Nyquist criterion, which requires the space between two sensors to be less than half of the signal wavelength. A disadvantage of densely spaced antenna elements is the effect of mutual coupling, normally reduced through costly extensive calibration of the system.

Using a regularly spaced antenna system for DOA estimation can be formulated as an exponential analysis problem, which can be tackled by the classical Prony method from approximation theory. Interestingly, the Ben-Or/Tiwari sparse interpolation algorithm in computer algebra is closely related to Prony's method. This connection has led to a major development in exponential analysis that can circumvent the Nyquist constraint, hence allow us to completely remove the dense Nyquist spacing requirement for DOA in antenna design.

This is joint work with Annie Cuyt, Ferre Knaepkens, Dirk I. L. de Villiers.
1 October

8 October

15 October

22 October

29 October

5 November

12 November
No seminar UG Reading week

19 November
No seminar PG Reading week

26 November

3 December

10 December

Previous Seminar Series

2021:  Spring  
2020:  Spring   Autumn
2019:  Spring   Autumn
2018:  Spring   Autumn
2017:  Spring   Autumn
2016:  Spring   Autumn
2015:  Spring   Autumn
2014:  Spring   Autumn
2013:  Spring   Autumn
2012:  Spring   Autumn
2011:  Spring   Autumn
2010:  Spring   Autumn
2009:  Spring   Autumn
2008:  Spring   Autumn
2007:  Spring   Autumn
2006:  Spring   Autumn
2005:  Spring   Autumn
2004:  Spring   Autumn
2003:  Spring   Autumn
2002:  Spring   Autumn
2001:  Spring   Autumn
2000:  Spring   Autumn
1999:  Spring   Autumn
1998:  Spring   Autumn
1997:  Spring   Autumn
1996:  Autumn

Top image: Image and vision processing.
Courtesy of Dr. Deepayan Bhowmik.

Connect with Computing Science and Mathematics

Division of Computing Science and Mathematics

Computing Science and Mathematics

Faculty of Natural Sciences
University of Stirling
Stirling FK9 4LA
Scotland UK

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+44 01786 464551

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