Title :
Envelope tracking power amplifier with pre-distortion linearization for WLAN 802.11g
Author :
Wang, Feipeng ; Ojo, Adedayo ; Kimball, Donald ; Asbeck, Peter ; Larson, Lawrence
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., San Diego, CA, USA
Abstract :
This paper presents a power amplifier based on envelope tracking (ET) with application to the WLAN 802.11g system. Baseband pre-distortion is implemented to improve the linearity. A high-efficiency wide-bandwidth envelope amplifier and a GaAs MESFET class AB RFPA are designed and implemented for the system. An overall system drain efficiency of 30% is obtained for an OFDM output power of 20 dBm at 2.4GHz.
Keywords :
MESFET circuits; OFDM modulation; gallium compounds; linearisation techniques; microwave power amplifiers; wireless LAN; 2.4 GHz; 30 percent; GaAs MESFET; OFDM output power; WLAN 802.11g; baseband pre-distortion; class AB RFPA; drain efficiency; efficient envelope amplifier; envelope tracking; power amplifier; pre-distortion linearization; wide-bandwidth envelope amplifier; Baseband; Linearity; MESFETs; OFDM; Power amplifiers; Power generation; RF signals; Radio frequency; Radiofrequency amplifiers; Wireless LAN;
Conference_Titel :
Microwave Symposium Digest, 2004 IEEE MTT-S International
Print_ISBN :
0-7803-8331-1
DOI :
10.1109/MWSYM.2004.1338872
