Cartesian Feedback with digital enhancement applied to fully integrated CMOS RF transmitter

Nathalie Deltimple (1) , Nicolas Delaunay (1, 2) , Walid Sanaa (1, 3) , Bertrand Le Gal (1) , Chiheb Rebai (4) , Dominique Dallet (1) , Didier Belot (2) , Eric Kerherve (1)

1 IMS - Laboratoire de l'intégration, du matériau au système
2 ST-CROLLES - STMicroelectronics [Crolles]
3 SUP'COM [TUNIS] - Ecole supérieure des communications de Tunis
4 SUP'COM

The trend to higher data rates communication systems requires complex modulation techniques, resulting in signals with high peak-to-average power ratio (PAPR). To satisfy the stringent linearity requirements, linearization techniques have attracted a lot of attentions in the research community. Many methods (analog or digital) are proposed to reduce the effects of nonlinearities like Pre-distortion, Post-distortion, Feedback and Feed-forward techniques. Among these, Cartesian feedback (CFB) is an attractive option. Hence, we develop an analog and digital Cartesian Feedback technique to an integrated transmitter in a 65nm CMOS technology. This technique offers flexibility and paves the way to multi-standard linearized RF transmitters

Mots clés: Power amplifier; linearization techniques; mixed analog digital cartesian feedback

Domaines: Micro et nanotechnologies/Microélectronique

Nathalie Deltimple, Nicolas Delaunay, Walid Sanaa, Bertrand Le Gal, Chiheb Rebai, et al.. Cartesian Feedback with digital enhancement applied to fully integrated CMOS RF transmitter. IMS2012 International Microwave Symposium, Workshop WSD: RF & mmW PAs: Linearization and Power Challenges, Jun 2012, Montreal, Canada. ⟨hal-00714363⟩