Title :
Concurrent dual-band envelope tracking power amplifier for carrier aggregated systems
Author :
Sarbishaei, Hassan ; Yushi Hu ; Fehri, Bilel ; Boumaiza, Slim
Author_Institution :
Univ. of Waterloo, Waterloo, ON, Canada
Abstract :
This paper presents a dual-band envelope tracking power amplifier (ET PA) capable of amplifying concurrent dual-band modulated signals using a typical single-band envelope amplifier. The dual-band ET PA succeeded to concurrently amplify widely spaced dual-band modulated signals with balanced and imbalanced output powers in each band. The dual-band ET PA was linearized using dual-band Volterra based digital pre-distortion that accounted for the drain supply modulation. When driven with a dual-band signal formed of WCDMA and 5MHz LTE signals at 780MHz and 880MHz respectively, the ET PA achieved an average output power and drain efficiency of better than 39 dBm and 45% with an adjacent channel power ratio of better than -47 dBc for both bands.
Keywords :
Long Term Evolution; UHF power amplifiers; Volterra series; code division multiple access; distortion; linearisation techniques; ET PA; LTE; WCDMA; adjacent channel power ratio; carrier aggregated systems; drain efficiency; drain supply modulation; dual band Volterra based digital predistortion; dual band envelope tracking power amplifier; frequency 5 MHz; frequency 780 MHz; frequency 880 MHz; linearization; Dual band; Frequency modulation; Gallium nitride; Generators; Peak to average power ratio; Concurrent dual-band transmission; GaN; RF Power amplifiers; envelope tracking;
Conference_Titel :
Microwave Symposium (IMS), 2014 IEEE MTT-S International
Conference_Location :
Tampa, FL
DOI :
10.1109/MWSYM.2014.6848539
