Adaptive Predistortion Architecture for Nonideal Radio Transmitter

A nonideal radio transmitter both distorts the desired signal and generates spectral regrowth causing interference to adjacent channels. Predistortion techniques can be used to minimize these effects. The joint effect of different types of nonidealities is not straightforward to analyze and has not...

Full description

Saved in:
Bibliographic Details
Main Authors: Lasanen, M., Kotelba, A., Hekkala, A., Jarvensivu, P., Mammela, A.
Format: Conference Proceeding
Language:English
Subjects:
Frequency response
Nonlinear distortion
Nonlinear filters
Phase noise
Power amplifiers
Predistortion
Radio frequency
Radio transmitters
Radiofrequency amplifiers
Signal generators
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A nonideal radio transmitter both distorts the desired signal and generates spectral regrowth causing interference to adjacent channels. Predistortion techniques can be used to minimize these effects. The joint effect of different types of nonidealities is not straightforward to analyze and has not yet been studied in detail in the literature. In this paper, we demonstrate how to adaptively predistort a nonlinear high power amplifier and an I/Q modulator, and to compensate the frequency response of a radio frequency filter. The study considers the spatial order of adaptive predistorters and the temporal sequence of adaptation steps. In this way, both the system capacity and the power efficiency are improved.
ISSN:1550-2252
DOI:10.1109/VETECS.2008.265