Enhancement of multichannel data in plasma physics by biorthogonal decomposition
- 1 February 1995
- journal article
- Published by IOP Publishing in Plasma Physics and Controlled Fusion
- Vol. 37 (2) , 117-135
- https://doi.org/10.1088/0741-3335/37/2/005
Abstract
The biorthogonal decomposition (also referred to as the singular value decomposition) has recently emerged as a powerful tool for analysing and processing multichannel data. It is shown how this method can be used to enhance the signal-to-noise ratio of such data in a self-consistent way. Three applications to multichannel diagnostics that are routinely used on plasma devices, are presented: a soft X-ray camera, an XUV spectrometer and a microwave reflectometer. In each case, a physical interpretation of the enhancement is given. Furthermore, a robust criterion is presented, allowing data to be processed without making restrictive assumptions about their noise properties.Keywords
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