Reduction of Intermodulation Effects in Power Amplifiers through Segmented Predistortion

Current communication standards, such as DAB, DVB-T or 4G impose strong requirements to limit the negative effects on modulated signals of distortion or bad synchronization between emitter and receiver in digital channels. Distortion is mainly due to the nonlinear behavior of the output stage of the...

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Bibliographic Details
Published in2007 IEEE International Symposium on Industrial Electronics pp. 1779 - 1784
Main Authors Mato, J.L., Pereira, M., Rodriguez-Andina, J.J., Farina, J., Soto, E., Perez, R.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.06.2007
Subjects
Communication standards
Digital modulation
Digital video broadcasting
Feedback
Frequency synchronization
Intermodulation distortion
Nonlinear distortion
OFDM
Power amplifiers
Predistortion
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Summary:Current communication standards, such as DAB, DVB-T or 4G impose strong requirements to limit the negative effects on modulated signals of distortion or bad synchronization between emitter and receiver in digital channels. Distortion is mainly due to the nonlinear behavior of the output stage of the emitter's power amplifier, in the form of saturation or memory effects. In order for these effects to be mitigated, a correction can be applied to the input signals, causing them a distortion contrary to that occurring in the amplifier. Several analog and digital predistortion techniques have been proposed in the literature. This paper presents a new digital predistortion method which allows the requirements of DVB-T gap fillers in single frequency networks (SFN) to be accomplished while reducing processing time and complexity with regard to previous solutions. Experimental results are presented which support the claimed contributions of the method.
ISBN:1424407540
9781424407545
ISSN:2163-5137
DOI:10.1109/ISIE.2007.4374875