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Fall 2012 GRASP Seminar – Visa Koivunen, Aalto University, Finland, “Optimal Array Processing in The Face of Nonidealities (with wireless localization examples)”

November 16, 2012 @ 11:00 am - 12:00 pm

Abstract: In this talk we describe techniques that allow the practitioner
to apply high performance array
processing algorithms using real-world sensor arrays with nonidealities.
Arbitrary array geometries and processing
data  in azimuth, elevation and polarimetric domains are considered. We
acquire a realistic array steering vector
model by taking into account array nonidealities such as mutual coupling,
mounting platform reflections,
cross-polarization effects, errors in  element positions as well as
individual directional beampatterns. This
facilitates achieving optimal or close-to-optimal performance and
retaining high-resolution capability despite the
nonidealities. Moreover, tighter performance bounds may be established for
parameter estimation. We describe how
the various  approaches can be applied in practice in the context of
high-resolution  direction finding as well as
beamforming so that problems related to beamsteering, SOI and interference
cancellation are mitigated.


- Learn More

Visa Koivunen (IEEE Fellow) received the D.Sc. (EE) degree
(with honors) from the Department of
Electrical Engineering, University of Oulu, Finland. From 1992 to 1995, he
was a visiting researcher at the
University of Pennsylvania, Philadelphia. Since 1999, he has been a
Full Professor of Signal Processing at Aalto
University (formerly known as Helsinki Univ of Technology), Finland. Since
2009 he has been Academy professor (distinguished professor nominated bu
the Academy of Finland) at Aalto University. He is one of the Principal
Investigators in the SMARAD
(Smart Radios and Wireless Systems)
Center of Excellence nominated by the Academy of Finland. During his
sabbatical leave in 2006-2007, he was a
Visiting Fellow at Nokia Research Center, as well as Princeton University.
He makes frequent research visits to
Princeton University. He has served as Nokia Visiting Fellow in a
part-time basis.

His research interests include statistical, communications, and sensor
array signal processing. He has published
more than 350 papers in international scientific conferences and journals.
He co-authored the papers receiving the
IEEE Signal Processing Society Best Paper Award for 2007 (co-authored with
J. Eriksson). He has also received a few other best paper awards from
signal processing conferences. He is a member of the
editorial board for the IEEE Signal Processing Magazine. He is also a
member of the IEEE Sensor Array Multichannel Signal Processing Technical
Committee. He is also serving in the industrial relations board of the
IEEE SP society.


November 16, 2012
11:00 am - 12:00 pm
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