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Description
  • V tomto článku navrhujeme variantu známého algoritmu FastICA pro použití za přítomnosti aditivního šumu. Algoritmus kombinuje symetrickou FastICA, test sedlových bodů, ktery byl nově odvozeny i pro signály s komplexními hodnotami, a jemné doladení pomocí FastICA pro každou komponentu zvlášť. Vychýlení navrženého algorimu je řádu O(sigma^3), pokud sigma^2 je variance aditivního šumu, přičemž vychýlení jiných běžně používaných algoritmů je větší, řádu O(sigma^2). V důsledku nižšího vychýlení odhadu umožňuje nový algoritmus, pokud je aplikován na data s konečnou abecedou, snížení četností chyb. (cs)
  • In this paper, a variant of the well known algorithm FastICA isproposed to be used for blind source separation in off-line (block processing) setup and a noisy environment. The algorithm combines a symmetric FastICA with test of saddle points to achieve fast global convergence and a one-unit refinement to obtain high noise rejection ability. A novel test of saddle points is designed for separation of complex-valued signals. The bias of the proposed algorithm due to additive noise can be shown to be asymptotically proportional to $/sigma^3$ for small $/sigma$, where $/sigma^2$ is the variance of the additive noise.
  • In this paper, a variant of the well known algorithm FastICA isproposed to be used for blind source separation in off-line (block processing) setup and a noisy environment. The algorithm combines a symmetric FastICA with test of saddle points to achieve fast global convergence and a one-unit refinement to obtain high noise rejection ability. A novel test of saddle points is designed for separation of complex-valued signals. The bias of the proposed algorithm due to additive noise can be shown to be asymptotically proportional to $/sigma^3$ for small $/sigma$, where $/sigma^2$ is the variance of the additive noise. (en)
Title
  • Blind instantaneous noisy mixture separation with best interference-plus-noise rejection
  • Slepá separace zašuměné směsi signálu s optimálním potlačením interference a šumu (cs)
  • Blind instantaneous noisy mixture separation with best interference-plus-noise rejection (en)
skos:prefLabel
  • Blind instantaneous noisy mixture separation with best interference-plus-noise rejection
  • Slepá separace zašuměné směsi signálu s optimálním potlačením interference a šumu (cs)
  • Blind instantaneous noisy mixture separation with best interference-plus-noise rejection (en)
skos:notation
  • RIV/67985556:_____/07:00085699!RIV08-AV0-67985556
http://linked.open.../vavai/riv/strany
  • 730;737
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(1M0572), Z(AV0Z10750506)
http://linked.open...iv/cisloPeriodika
  • 4666
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 412040
http://linked.open...ai/riv/idVysledku
  • RIV/67985556:_____/07:00085699
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • blind source separation; independent component analysis (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • DE - Spolková republika Německo
http://linked.open...ontrolniKodProRIV
  • [DE71B674BD83]
http://linked.open...i/riv/nazevZdroje
  • Lecture Notes in Computer Science
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 2007
http://linked.open...iv/tvurceVysledku
  • Koldovský, Zbyněk
  • Tichavský, Petr
http://linked.open...n/vavai/riv/zamer
issn
  • 0302-9743
number of pages
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