DocumentCode :
2557013
Title :
Hybrid EER transmitter using highly efficient saturated power amplifier for 802.16e mobile WiMAX application
Author :
Kim, Ildu ; Kim, Jangheon ; Moon, Junghwan ; Kim, Jungjoon ; Woo, Young Yun ; Kim, Bumman
Author_Institution :
Dept. of Electr. Eng., Pohang Univ. of Sci. & Technol.(POSTECH), Pohang, South Korea
fYear :
2009
fDate :
7-12 June 2009
Firstpage :
1385
Lastpage :
1388
Abstract :
We have demonstrated a highly efficient Hybrid Envelope Elimination and Restoration transmitter for IEEE 802.16e Mobile WiMAX application using a highly efficient saturated Power amplifier (PA). For the optimum H-EER operation, the PA has been designed to have a maximum PAE at the average Vds region by using 10 W (P3dB) GaN High Electron Mobility Transistor. The maximum Power-added efficiency (PAE) is a 74.07 % at the 14 V Vds. The bias modulator designed using a Hybrid Switching Amplifier (HSA) has a 73.3 % of efficiency. In the interlock experiment, the transmitter has shown an excellent PAE performance of 45.9 % at an average output power of 33.07 dBm with drain efficiency (DE) of 48.86 %. By using digital predistortion technique, the Relative Constellation Error (RCE) has been satisfied the specification of -30 dB with -36.88 dB. When considering the saturated PA with constant drain bias, the average PAE of the proposed transmitter has been hugely improved, about 13.64 %. These results clearly show that the H-EER transmitter using the saturated PA can deliver the excellent PAE performance.
Keywords :
WiMax; distortion; gallium compounds; high electron mobility transistors; mobile radio; modulation; power amplifiers; signal restoration; 802.16e mobile WiMax application; GaN; bias modulator; digital predistortion technique; high electron mobility transistor; hybrid envelope elimination-restoration transmitter; optimum hybrid EER transmitter; power 10 W; power-added efficiency; relative constellation error; saturated power amplifier; Gallium nitride; HEMTs; High power amplifiers; Impedance; Peak to average power ratio; Power generation; Power system harmonics; Transmitters; Voltage; WiMAX; Envelope Elimination and Restoration (EER); Gallium Nitride (GaN); HEMT; WiMAX; high efficiency; power amplifier;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Microwave Symposium Digest, 2009. MTT '09. IEEE MTT-S International
Conference_Location :
Boston, MA
ISSN :
0149-645X
Print_ISBN :
978-1-4244-2803-8
Electronic_ISBN :
0149-645X
Type :
conf
DOI :
10.1109/MWSYM.2009.5165964
Filename :
5165964
Link To Document :
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