Vorträge und Posterpräsentationen (mit Tagungsband-Eintrag):
H. Ruotsalainen, H. Arthaber, G. Magerl:
"Quantization Noise Cancelation Scheme for Digital Quadrature RF Pulse Encoding";
Poster: IMS 2013 - International Microwave Symposium 2013,
Seattle, U.S.A.;
02.07.2013
- 07.07.2013; in: "IEEE MTT-S International Microwave Symposium Digest",
(2013),
ISBN: 978-1-4673-2141-9.
Kurzfassung englisch:
Quadrature type pulsed Radio frequency (RF) Signal Encoding combined with class-S switched-mode power amplification (SMPA) constitute a potential solution for high efficiency RF transmitters. However, the digital center frequency adjustment for such encoding methods is limited by quantization noise folding. In this paper, a novel quantization noise cancelation scheme is proposed that in an ideal case suppresses the folding distortion components completely. In addition, a low complexity practical solution easily embedable in an existing modulator architecture is given. According to the measurement results, up to 7 dB improvement in signal-to-noise-and-distortion ratio was achieved over a total center frequency tuning range of 160 MHz using a 20 MHz LTE Signal excitation.
Erstellt aus der Publikationsdatenbank der Technischen Universität Wien.