Multicarrier digital pre-distortion/ equalization techniques for non-linear satellite channels
2012 (English)In: 30th AIAA International Communications Satellite Systems Conference (ICSSC), 2012Conference paper (Refereed)
Two key advances are envisaged for future missions: (a) spectrally efficient transmission to meet the increasing demand and (b) sharing of satellite capacity among different links to meet power/massrequirements.Joint amplification of multiple-carrier DVB-S2 signals using a single High-Power Amplifier (HPA) is a particular application of satellite resource sharing. However, effects specific tosuch a scenariothat degrade power and spectral efficiencies include (a) an increased Adjacent Channel Interference caused by non-linear characteristic ofthe HPA and (b)increased peak to average power ratio. The paper studies signal processing techniques –digital pre-distortion (DPD) at the gateway and equalization (EQ) at the User Terminal–to mitigate the non-linear effects and improve power as well as spectral efficiencies.While the algorithms for DPD and EQ are described in literature, their use in multi-carrier scenario is novel and poses new challenges that are investigated in the paper.
Place, publisher, year, edition, pages
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:hig:diva-15986DOI: 10.2514/6.2012-15156OAI: oai:DiVA.org:hig-15986DiVA: diva2:686326
30th AIAA International Communications Satellite Systems Conference (ICSSC), Ottawa, Canada, September 24-27, 2012