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17.04.2015 - Publication of a new signal processing method:

SPHARA – A Generalized Spatial Fourier Analysis for Multi-Sensor Systems with Non-Uniformly Arranged Sensors

Published by scientists from the Institute of Biomedical Engineering and Computer Science in the journal "PLOS ONE"

Scientists of the Institute of Biomedical Engineering and Computer Science have published a new signal processing method in the renowned online journal of the Public Library of Science - PLOS ONE. The new approach for spatial harmonic analysis (SPHARA) extends the classical spatial Fourier analysis to sensors positioned non-uniformly on an arbitrary surface. The harmonic orthonormal basis functions, used for the Fourier analysis, are adaptively computed using the topology of the sensor setup and the sensor positions. A number of possible applications are presented, such as analysis of the spatial properties of SEP data, spatial filtering, dimensionality reduction and noise reduction. Furthermore, a number of further applications of SPHARA are conceivable, even outside the scope of biosignal processing.
The new method was developed in the cooperation projects “Development of an innovative technology for the reliable and fast calculation of standardized EEG recordings on the basis of high-resolution measurements” (AiF-Project: KF2250117KJ3) and “ANDREA” (European Union: FP7-PEOPLE Marie Curie IAPP Project 610950) together with our cooperation partners:

Contact persons: Dr. rer. nat. Uwe Graichen, Prof. Dr.-Ing. habil. Jens Haueisen