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