Patent ID: 6772182
Filing Date: 2004-08-03
Classification: H03H

Abstract:
A matched-phase noise filter comprising a processor implementing the filter function: F~&af;(Ï‰)=&ee;+1&it;â€ƒ&it;Ï†&it;â€ƒ&it;(Ï‰)(&LeftBracketingBar;P~&af;(Ï‰)&RightBracketingBar;-&Integral;â€ƒ&it;&dd;Ï‰&it;&LeftBracketingBar;P~&af;(Ï‰)||N~&af;(Ï‰)&RightBracketingBar;&AutoLeftMatch;&Integral;â€ƒ&it;&dd;Ï‰&it;&LeftBracketingBar;N~&af;(Ï‰)&RightBracketingBar;2&it;&LeftBracketingBar;N~&af;(Ï‰)&RightBracketingBar;),wherein:&phgr;(&ohgr;) is a set of phases; {tilde over (P)}(&ohgr;) is the frequency spectrum of a received signal; Ã‘(&ohgr;) is the frequency spectrum of a noise component of the received signal; and {tilde over (F)}(&ohgr;) is the frequency spectrum of the received signal with the noise spectrum projected out.