CFR ERROR DEPOSITION OUT OF THE TRANSMISSION BAND

An apparatus comprises a digital processing device configured to generate a digital transmission signal, a digital-to-analog converter connected to the digital processing device and configured to convert the digital transmission signal into an analog transmission signal, and a power amplifier connec...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: WOLFF, Gunter, CESZKIEL, Radoslaw, WEBER, Michael, HAZA, Grzegorz, JELONNEK, Björn
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:An apparatus comprises a digital processing device configured to generate a digital transmission signal, a digital-to-analog converter connected to the digital processing device and configured to convert the digital transmission signal into an analog transmission signal, and a power amplifier connected to the digital-to-analog converter and configured to amplify the analog transmission signal. An antenna filter is connected to the power amplifier and configured to filter the amplified analog transmission signal; the antenna filter is configured to pass frequencies in at least one passband and to attenuate frequencies in at least one stopband. The digital processing device is configured to perform a process of reducing peak power in the digital transmission signal; in this process error components having different frequencies are produced. A frequency spectrum of the error components is manipulated such that a part of the error components is deposited in the stopband of the antenna filter.