H - Electricity – 03 – F
Patent
H - Electricity
03
F
H03F 1/32 (2006.01)
Patent
CA 2405949
A device for pretreating a signal (S1) to be transmitted over a transmission path, wherein the transmission path comprises a band-pass filter (14) whose pass-band width is smaller than a predetermined bandwidth and a non-linear amplifier (16), includes a linearization means (20) for performing a linearization of the signal (S1) to be transmitted before the transmission of the same, such that a non-linearity caused by the non-linear amplifier (16) is counteracted. Further, the device includes a signal-shaping means (22) downstream to the linearization means (20) comprising a frequency response such that the overall frequency response of the signal-shaping means (22) and the band-pass filter (14) corresponds to the frequency response of a filter whose pass-band width is at least equal to the predetermined bandwidth.
L'invention concerne un dispositif de prétraitement d'un signal (S1) à transmettre par une voie de transmission qui comporte un filtre passe-bande (14) dont la largeur de bande passante est inférieure à une largeur de bande prédéterminée, et un amplificateur non linéaire (16). Ce dispositif comprend un dispositif de linéarisation (20) permettant d'effectuer une linéarisation du signal à transmettre (S1) avant de le transmettre de telle façon que soit contrariée toute non linéarité due à l'amplificateur non linéaire (16). Le dispositif comprend également un dispositif de conformation de signaux (22) qui est monté en aval du dispositif de linéarisation (20) et qui présente une courbe fréquentielle telle que la courbe fréquentielle globale du dispositif de conformation des signaux (22) et du filtre passe-bande (14) corresponde à la courbe fréquentielle d'un filtre dont la largeur de bande passante est au moins égale à la largeur de bande prédéterminée.
Gerhauser Heinz
Perthold Rainer
Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung
Riches Mckenzie & Herbert Llp
LandOfFree
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