H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 1/707 (2006.01)
Patent
CA 2240867
A method for eliminating spurious signals in a direct-sequence spread spectrum link, comprising a step of frequential spurious signal detection by comparison of the composite input signal spectrum with a threshold, and a step of composite input signal filtering using a rapid-convolution finite impulse response filter, wherein the detection threshold is controlled by means of an estimation of the input spectral density after large spurious signals have been eliminated. A device for eliminating spurious signals is also provided.
La présente invention concerne un procédé d'élimination de signal parasite dans une liaison à spectre étalé à séquence directe comprenant les étapes suivantes: détection fréquentielle de signaux parasites par comparaison du spectre du signal composite d'entrée à un seuil; filtrage du signal composite d'entrée par un filtre à réponse impulsionnelle finie par convolution rapide; dans lequel on asservit le seuil de détection en utilisant une estimation de la densité spectrale d'entrée, après élimination des gros signaux parasites. L'invention concerne également un dispositif d'élimination de signal parasite.
Centre National D'etudes Spatiales
Goudreau Gage Dubuc
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