Predistortion for Wideband Nonlinear Satellite Downlinks

Predistortion for Wideband Nonlinear Satellite Downlinks

In this letter, an efficient predistortion scheme is proposed to compensate imperfections in a satellite channel due to the nonlinear power amplifier and the output channel filter. The predistorter is a Wiener system consisting of the linear and nonlinear components, which are trained independently....

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Veröffentlicht in:IEEE communications letters 2017-09, Vol.21 (9), p.1985-1988
Hauptverfasser: Layton, Kelvin J., Mehboob, Azam, Akhlaq, Assad, Bagaglini, Flaviano, Cowley, William G., Lechner, Gottfried
Format: Artikel
Sprache:eng
Schlagworte:
Computational modeling
Data models
digital predistortion
equalization
Iterative methods
Nonlinear distortion
Nonlinear satellite channels
OMUX filter
Predistortion
Satellites
Volterra series
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Beschreibung
Zusammenfassung:In this letter, an efficient predistortion scheme is proposed to compensate imperfections in a satellite channel due to the nonlinear power amplifier and the output channel filter. The predistorter is a Wiener system consisting of the linear and nonlinear components, which are trained independently. The predistorter is well suited to systems where the data bits are generated onboard the satellite. The proposed setup effectively compensates the distortions and has lower complexity compared with other strategies.
ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2017.2710339