Who
Dr. Andreas Polydoros
Chair, Technical Advisory Board & Co-Founder, TrellisWare Technologies
When
11 Sep 2025, 11:00 Athens time, Science Building 141Π98 Amphitheater Thelma Mavridou
Title
Distributed Beamforming: Recent Advances and Research Challenges
Abstract
We will first describe briefly the key tenets of Distributed Beamforming (DBF), a concept familiar to the research community for over 20 years, which generalizes co-located antenna arrays to the distributed wireless paradigm. Then we focus on a particular approach, namely “Channel-Reciprocity-Based” (CRB) DBF, a version that utilizes digital signal processing to emulate the original concept of conjugating mirrors from optical physics. We will present a basic Lemma which specifies the main condition that all variants of CRB-DBF must satisfy. Subsequently we describe one specific variant which utilizes the CRB principle twice, once for local-cluster calibration and once for remote (destination) coherence. This patented solution is robust, efficient, practical and has been recently productized. We will conclude with implementational and research challenges such as network scaling, nodal dynamics, and high-accuracy phase-time-frequency synchronization in uncertain environments.
About the Speaker
Andreas Polydoros, Ph.D., served in academia for over 45 years (University of Southern California, National and Kapodistrian University of Athens). In parallel, he pioneered the co-founding of TrellisWare Technologies in San Diego, CA, (in the year 2000), where he has served as Chair of the Technical Advisory Board and, subsequently, as a full-time employee since 2022. His research has been on wireless communication links and networks in uncertain environments, drawing from theoretical tools in random processes, decision theory and digital signal processing. He has been a Fullbright scholar, an IEEE Fellow (1995), an ISI Highly Cited Researcher and the recipient of the 2022 Technical Achievement Award of the IEEE MILCOM Conference.
