Dr. Stephan Sigg Researcher DAAD Technische Universität Braunschweig Carl-Friedrich-Gauß-Fakultät Informatik Institut für Betriebssysteme und Rechnerverbund Mühlenpfordtstraße 23, 1. OG 38106 Braunschweig Telefon: +49 531 3913249 Telefax: +49 531 3915936 EMail: sigg[[at]]ibr.cs.tu-bs.de

I am interested in the design, analysis and optimisation of (randomized) algorithms for applications in Pervasive and Ubiquitous computing and in the Internet of Things. Recently, my research focuses on exploiting physical layer properties of radio frequency channels or ambient audio.

Projects
	RF-based device-free activity recognition Recognition of activities from individuals in the proximity of an RF-receiver. We leverage amplitude-based features for the distinction of situations, activities and gestures.		Spontaneous secure device interaction Based on fingerprints from ambient audio of devices in proximty we generate secure cryptographic keys with the help of fuzzy cryptography
	Function-calculation on the RF-channel We exploit the convolution of random distributions for the calculation of mathematical functions from superimpositions of simultaneously transmitted values.		Distributed adaptive beamforming We analyse a class of iterative feedback-based distributed beamforming approaches with low computational complexity. Sharp asymptotic bounds and an asymptotically optimal approach.
	Context prediction We proactively anticipate the evolution of context time series, investigate architectures for context prediction and consider novel prediction algorithms.

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