Title :
Synergistic design of DSP and power amplifiers for wireless communications
Author :
Asbeck, Peter M. ; Larson, Lawrence E. ; Galton, Ian G.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., San Diego, La Jolla, CA, USA
fDate :
11/1/2001 12:00:00 AM
Abstract :
Co-design of digital signal-processing (DSP) algorithms and power-amplifier characteristics can lead to improved efficiency and linearity through a variety of strategies including: predistortion, DSP control over bias conditions, particularly the power supply voltage, and DSP generation of digital input signals for switching amplifiers. This paper discusses several amplifier architectures that exemplify these approaches, including: bias-controlled amplifiers, linear amplification with nonlinear component amplifiers, and class-S 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 :
MMIC power amplifiers; UHF integrated circuits; UHF power amplifiers; delta-sigma modulation; digital radio; digital signal processing chips; integrated circuit design; land mobile radio; network parameters; amplifier architectures; amplifier parameters; bias conditions; bias-controlled amplifiers; class-S amplifiers; digital input signals; digital signal-processing algorithms; linear amplification; nonlinear component amplifiers; power amplifiers; power supply voltage; predistortion; smart power amplifiers; switching amplifiers; wireless communications; Clocks; Digital circuits; Digital signal processing; Digital signal processing chips; Linearity; Power amplifiers; Power generation; Radiofrequency amplifiers; Throughput; Wireless communication;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
