Title :
Dual-band predistortion linearization of an envelope modulated power amplifier operated in concurrent multi-standard mode
Author :
Kwan, Andrew K. ; Younes, M. ; Silong Zhang ; Wenhua Chen ; Darraji, Ramzi ; Helaoui, Mohamed ; Ghannouchi, Fadhel M.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Calgary, Calgary, AB, Canada
Abstract :
This paper reports a dual band predistortion linearization technique for an envelope modulator based transmitter operated in concurrent multi-band, multi-standard mode driven by 20 MHz bandwidth LTE and 4 carrier 20 MHz bandwidth WCDMA signals. To reduce the speed of the composite envelope path, a bandwidth reduced combined envelope signal is used for the dynamic supply of the dual-band PA. Measurement results using the dual-band linearization technique show an increase of over 10 dB in ACPR and 15% in average operating efficiency.
Keywords :
Long Term Evolution; Volterra series; code division multiple access; distortion; linearisation techniques; power amplifiers; LTE signals; WCDMA signals; bandwidth 20 MHz; composite envelope path; dual band predistortion linearization; envelope modulated power amplifier; Baseband; Dual band; MIMO; Multiaccess communication; Radio frequency; Spread spectrum communication; Transmitters; Volterra series; digital predistortion; dual-band linearization; envelope tracking power amplifier;
Conference_Titel :
Microwave Symposium (IMS), 2014 IEEE MTT-S International
Conference_Location :
Tampa, FL
DOI :
10.1109/MWSYM.2014.6848536
