000263873 001__ 263873
000263873 005__ 20190812204757.0
000263873 037__ $$aCONF
000263873 245__ $$aFourier dimensionality reduction for fast radio transients
000263873 260__ $$c2019-02-03
000263873 269__ $$a2019-02-03
000263873 336__ $$aConference Papers
000263873 520__ $$aIn the context of next-generation radio interferometers, we are facing a big challenge of how to economically process data. The classical dimensionality reduction technique, averaging visibilities on time, may dilute fast radio transients (FRT). We propose a robust fast approximate SVD-based dimensionality reduction method for FRT imaging. For each time slice of FRT imaging, our dimensionality reduction defines a linear embedding operator to reduce the space spanned by the left singular vectors of the measurement operator and this operator can be fast obtained via a weighted fft on adjoint measurement operator instead of expensive SVD. The preliminary results showcase that the proposed dimensionality reduction can simultaneously reduce the data significantly and recover FRT correctly, while the averaging technique causes the FRT dilution problem.
000263873 6531_ $$adimensionality reduction
000263873 6531_ $$aradio interferometry
000263873 6531_ $$afast radio transients
000263873 6531_ $$asparse recovery
000263873 700__ $$uming.jiang@epfl.ch$$aJiang, Ming
000263873 700__ $$g238905$$aKartik, Vijay$$0247664
000263873 700__ $$aThiran, Jean-Philippe$$0240323$$g115534
000263873 700__ $$aWiaux, Yves
000263873 7112_ $$aInternational BASP Frontiers workshop 2019$$cVillars-sur-Ollon, Switzerland$$dFebruary 3-8, 2019
000263873 8560_ $$fming.jiang@epfl.ch
000263873 8564_ $$zFinal$$uhttps://infoscience.epfl.ch/record/263873/files/abstract_novideo.pdf$$s157907
000263873 909C0 $$xU10954$$pLTS5$$mjean-philippe.thiran@epfl.ch$$0252394$$zMarselli, Béatrice
000263873 909CO $$qGLOBAL_SET$$pconf$$pSTI$$ooai:infoscience.epfl.ch:263873
000263873 960__ $$aming.jiang@epfl.ch
000263873 961__ $$afantin.reichler@epfl.ch
000263873 973__ $$aEPFL$$rREVIEWED
000263873 980__ $$aCONF
000263873 981__ $$aoverwrite