Title :
Digital Control of Power Amplifiers for Wireless Communications
Author :
Asbeck, P.M. ; Galton, I. ; Larson, L.E. ; Zhang, X. ; Iwamoto, M. ; Hinrichs, J. ; Keyzer, J.
Author_Institution :
Electrical and Computer Engineering Department, University of California, San Diego, La Jolla, CA, USA 92093-0407. E-mail: asbeck@ece.ucsd.edu
Abstract :
The advance of CMOS-based digital circuits enables new strategies for optimisation of wireless transmitters. Co-design of DSP algorithms and power amplifier characteristics can lead to improved efficiency and linearity through a variety of strategies, including: a) DSP control over bias conditions, particularly the power supply voltage; b) predistortion, in simple amplifiers, and in compound architectures such as LINC and Doherty amplifiers; and c) DSP generation of digital input signals for switching amplifiers. We envision for the future a generation of "smart power amplifiers" in which DSP optimization of amplifier parameters is carried out for changing environments.
Keywords :
Communication system control; Digital circuits; Digital control; Digital signal processing; Linearity; Power amplifiers; Power generation; Transmitters; Voltage control; Wireless communication;
Conference_Titel :
Microwave Conference, 2001. 31st European
Conference_Location :
London, England
DOI :
10.1109/EUMA.2001.339043
