Title :
Power amplifier linearization using feedforward technique for wide band communication system
Author :
Honarvar, M.A. ; Moghaddasi, M.N. ; Eskandari, Ar
Author_Institution :
Najafabad Branch, Islamic Azad Univ., Najafabad, Iran
fDate :
Jan. 9 2009-Dec. 11 2009
Abstract :
The performance of a wireless communication system depends on amplifier´s nonlinearity. In this paper, Feed-forward amplifier implementation for wideband communication system are introduced. By adding a new distortion cancellation loop to the original feedforward structure, improved measurement for large linearity power output is presented. The intermodulation distortion (IMD) for two tone harmonic balance has been reduced to -90.5 dBm. A UMTS downlink channel has been used as application case.
Keywords :
3G mobile communication; feedforward amplifiers; power amplifiers; radiofrequency amplifiers; UMTS downlink channel; Universal Mobile Telecommunication System; distortion cancellation loop; feed-forward amplifier; feedforward structure; feedforward technique; intermodulation distortion; linearity power output; power amplifier linearization; wide band communication system; wireless communication system; 3G mobile communication; Broadband amplifiers; Distortion measurement; Downlink; Feedforward systems; Intermodulation distortion; Linearity; Power amplifiers; Power measurement; Wireless communication; Feedforward technique; Linearization; RF power amplifiers;
Conference_Titel :
Radio-Frequency Integration Technology, 2009. RFIT 2009. IEEE International Symposium on
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-5031-2
Electronic_ISBN :
978-1-4244-5032-9
DOI :
10.1109/RFIT.2009.5383686
