Broadcast transmission system with correction for distortion

H - Electricity – 03 – F

Patent

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H03F 1/32 (2006.01)

Patent

CA 2374079

A transmission system (14) broadcasts a signal, a power amplifier (20) causes non-linear distortion. A pre-amp component, e.g. a band-pass filter (32), causes linear distortion. A high power filter (38) located downstream of the power amplifier (20) and causes linear distortion. A linear equalizer (42) compensates for the distortion caused by the high power filter (38). A non- linear corrector (44) compensates for the distortion caused by the power amplifier (20), and is located downstream of the linear equalizer (42). A linear equalizer (46) compensates for the distortion caused by the pre-amp components (e.g., 32). The compensating components (42-46) are located upstream of the distorting, pre-amp component (e.g., 32). An interpolation component (22) is located between the three compensating components (42-46) and the distortion causing components (20, 32, and 38). Signal sampling points (70-74) are located downstream of each distorting component (20, 32, and 38).

Un système de transmission (14) émet un signal. Au sein du système (14), un amplificateur de puissance (20) provoque une distorsion non linéaire. Un composant pré-amplificateur, tel qu'un filtre passe-bande (32), provoque une distorsion linéaire. Un filtre grande puissance (38) disposé en aval de l'amplificateur de puissance (20) provoque une distorsion linéaire. Un égalisateur linéaire (42) compense la distorsion provoquée par le filtre grande puissance (38). Un correcteur non linéaire (44), disposé en aval de l'égalisateur linéaire (42) compense la distorsion provoquée par l'amplificateur de puissance (20). Un égaliseur linéaire (46) compense la distorsion provoquée par les organes de pré-amplification (32). Les organes de compensation (42-46) sont situés en amont des organes de pré-amplification (32) responsables de la distorsion. Un organe d'interpolation (22) situé entre les trois organes de compensation (42-46) et les organes responsables de la distorsion (20, 32 et 38) augmente le débit du signal pour que la compensation intervienne à un débit inférieur dudit signal.

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