Accurate characterization of TWTA distortion in multicarrier operation by means of a correlation-based method

Author

Aloisio, Marinella ; Casini, Enrico ; Angeletti, Piero ; Balague, Roger Oliva ; Colzi, Enrico ; Addio, Salvatore D.

Author_Institution

RF Payload & Syst. Div., Eur. Space Agency ESA/ESTEC, Noordwijk

fYear

2008

fDate

22-24 April 2008

Firstpage

409

Lastpage

410

Abstract

Complex payload architectures, together with the use of high-order digital modulations and advanced coding schemes, call for a new interpretation of the traveling-wave tube (TWT) linearity parameters. We propose a correlation-based methodology to assess in a simple, yet effective, manner the level of intermodulation (IM) generated by the TWT nonlinearity; this method is particularly suited to accurate IM evaluation in the presence of multicarrier operation with non-constant envelope modulations.

Keywords

correlation methods; travelling wave amplifiers; TWTA distortion; complex payload architectures; correlation-based method; high-order digital modulation linearity parameters; multicarrier operation; nonconstant envelope modulations; Digital modulation; Frequency; Gaussian noise; High power amplifiers; Linearity; Modulation coding; Nonlinear distortion; Payloads; Power amplifiers; Signal to noise ratio; Communication satellites; high-order modulations; intermodulation; linearity; noise power ratio; traveling-wave Tube (TWT);

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electronics Conference, 2008. IVEC 2008. IEEE International

Conference_Location

Monterey, CA

Print_ISBN

978-1-4244-1715-5

Type

conf

DOI

10.1109/IVELEC.2008.4556373

Filename

4556373