Radio Frequency Power Amplifiers

This work considers behavioral modeling, parameter-
reduction, and digital predistortion of radio
frequency power amplifiers. Due to the use of modern
digital modulation methods, contemporary power
amplifiers are frequently subjected to signals
characterized by considerable bandwidths and fast
changing envelopes. As a result, traditional quasi-
memoryless amplitude-to-amplitude (AM/AM) and
amplitude-to-phase (AM/PM) characteristics are no
longer sufficient to describe and model the behavior
of power amplifiers; neither can they be
successfully used for linearization. In addition to
a complete review of the subject, this book include
two novel behavioral radio frequency power amplifier
models, a method to measure and analyze Volterra
kernels along certain paths in the frequency domain,
and the conclusion that when designing a PA for use
with digital predistortion it is most important to
reduce the memory effects in the linear term since
these will have the most significant impact on the
inverse function.

Autorentext

Dr. Magnus Isaksson received the Ph.D. degree from the Royal Institute of Technology, Stockholm, Sweden, in 2007. He worked with the Televerket, Sweden, during 1989-1999 and is currently an Ass. Prof. in the Univ. of Gävle. Dr. Isaksson is the author or co-author of many published peer-review journal articles and conferences in the area.

Klappentext

This work considers behavioral modeling, parameter-reduction, and digital predistortion of radio frequency power amplifiers. Due to the use of modern digital modulation methods, contemporary power amplifiers are frequently subjected to signals characterized by considerable bandwidths and fast changing envelopes. As a result, traditional quasi-memoryless amplitude-to-amplitude (AM/AM) and amplitude-to-phase (AM/PM) characteristics are no longer sufficient to describe and model the behavior of power amplifiers; neither can they be successfully used for linearization. In addition to a complete review of the subject, this book include two novel behavioral radio frequency power amplifier models, a method to measure and analyze Volterra kernels along certain paths in the frequency domain, and the conclusion that when designing a PA for use with digital predistortion it is most important to reduce the memory effects in the linear term since these will have the most significant impact on the inverse function.