Feed forward noise reduction in a transmitter

A circuit for use in a transmitter in a base station in a wireless cellular access system, comprising a main line with a first filter arranged in the main line with an input side and an output side in the main line. The circuit additionally comprises a feed forward cancellation loop with a second fi...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Hellberg, Richard, Klingberg, Mats, Plahn, Joakim
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:A circuit for use in a transmitter in a base station in a wireless cellular access system, comprising a main line with a first filter arranged in the main line with an input side and an output side in the main line. The circuit additionally comprises a feed forward cancellation loop with a second filter, the cancellation loop also having an input point and an output point. The cancellation loop is connected to the main line with the output point of the cancelation loop being connected to the main line on the output side of the first filter. Suitably, the first filter i.e. the main line filter, is a bandpass filter.