Detecting unauthorised radio communications devices

Details Detecting unauthorised radio communications devices Detecting unauthorised radio communications devices

G - Physics

01

V

G01V 3/12 (2006.01) H04W 12/00 (2009.01) H04B 17/00 (2006.01) G01S 5/14 (2006.01)

Patent

CA 2685820

A method for detecting unauthorised radio communications devices, the method including the steps of filtering received radio frequency signals into desired signals having a frequency band characteristic of an unauthorised radio communications device and undesired signals having a different frequency band characteristic of an authorised radio communications device, comparing respective levels of the desired and undesired signals with respective predetermined threshold levels, and generating detection signals indicative of the presence of the unauthorised radio communications device only if the desired signals exceed their predetermined threshold level and the undesired signals do not exceed their predetermined threshold level, thereby passively discriminating between the authorised and unauthorised radio communications devices, and interference therebetween.

L'invention concerne un procédé de détection de dispositifs de communication radio non autorisés, le procédé comprenant les étapes consistant à filtrer des signaux radiofréquence reçus en signaux souhaités ayant une bande de fréquence caractéristique d'un dispositif de communication radio non autorisé et en signaux non souhaités ayant une bande de fréquence caractéristique différente d'un dispositif de communication radio autorisé, comparer les niveaux respectifs des signaux souhaités et non souhaités avec des niveaux de seuils prédéterminés respectifs, et générer des signaux de détection indicatifs de la présence du dispositif de communication radio non autorisé uniquement si les signaux souhaités dépassent leur niveau seuil prédéterminé et les signaux non souhaités ne dépassent pas leur niveau seuil prédéterminé, faisant ainsi de façon passive une distinction entre les dispositifs de communication radio autorisés et non autorisés, et un brouillage entre eux.

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