Title :
Adaptive feed-forward linear power amplifier (LPA) for the IMT-2000 frequency band
Author :
Yoo, Kisuk ; Kang, Sanggee ; Choi, Jae-Ick ; Chae, Jong-Suk
Author_Institution :
Electron. & Telecommun. Res. Inst., Daejeon, South Korea
Abstract :
A modern digital communication system requires high linearity for the transfer characteristic during the amplification process. Especially, a noise-limited system like wide-band CDMA system for IMT-2000 requires low intermodulation distortion (IMD) products. We propose the optimal control method of an adaptive feed-forward linear power amplifier (LPA). It guarantees the stability and performance by experimental results
Keywords :
UHF power amplifiers; adaptive filters; adaptive signal processing; circuit stability; code division multiple access; digital radio; feedforward; intermodulation distortion; least mean squares methods; mobile radio; optimal control; IMT-2000 frequency band; WCDMA systems; adaptive feedforward amplifier; amplification process; digital communication system; intermodulation distortion products; linear power amplifier; low IMD products; noise-limited system; optimal control method; stability; transfer characteristic; wideband CDMA system; Broadband amplifiers; Digital communication; Feedforward systems; Intermodulation distortion; Linearity; Multiaccess communication; Optimal control; Power amplifiers; Programmable control; Wideband;
Conference_Titel :
Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-5471-0
DOI :
10.1109/ISCAS.1999.780091
