Systems and methods for photonically assisted rf filtering

H - Electricity – 04 – B

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H04B 15/00 (2006.01) G02B 5/20 (2006.01) G02B 6/10 (2006.01) H01P 1/20 (2006.01) H01S 5/12 (2006.01) H04B 10/02 (2006.01)

Patent

CA 2683885

Systems and methods for improved photonically-assisted RF filtering. Presently, processing of wide-band RF signals involves the use of multiple specialized equipment to isolate a region of interest from the spectrum. The present invention discloses the use of a modulation system to upconvert the RF signal onto the sideband of a light source such as a laser, an optical filter sub-system comprising a plurality of filtering units that function as combinations of HR and FTR filters, and a resonant channelizing filter for noise reduction and rejection of undesired channels, and means for control and agility of a piecewise coherent optical filter. The resulting filtered RF signal may then be downconverted to the electrical domain for further signal processing.

La présente invention concerne des systèmes et procédés pour filtrage RF à assistance phonique. À l'heure actuelle, le traitement de signaux RF à bande large comprend l'utilisation de nombreux équipements spécialisés afin d'isoler une zone d'intérêt du spectre. L'invention porte sur l'utilisation d'un système de modulation destiné à convertir de manière ascendante un signal RF sur la bande latérale d'une source lumineuse, telle qu'un laser, un sous-système optique composé d'une pluralité d'unités de filtration qui fonctionnent sous forme d'associations de filtres HR et FTR, un filtre résonant de découpage en canaux destiné à réduire le bruit et rejeter les canaux non désirés, ainsi que des moyens destinés à la commande et la souplesse d'un filtre optique cohérent par morceaux. Le signal RF filtré ainsi obtenu peut ensuite subir une conversion descendante vers le domaine électrique en vue d'un autre traitement de signal.

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