NDLI: A new adaptive predistortion technique using software-defined radio and DSP technologies suitable for base station 3G power amplifiers

Content Provider	IEEE Xplore Digital Library
Author	Jeckeln, E.G. Ghannouchi, F.M. Sawan, M.A.
Copyright Year	1963
Abstract	We present in this paper an advanced adaptive baseband/RF predistorter that integrates the concept of the software-defined radio technology into the power-amplifier (PA) linearization area. The linearizer performs an instantaneous characterization of the PA, using two digital receivers, in order to supply its instantaneous AM-AM and AM-PM curves. It then determines an inverse function that represents the best fit to the reciprocal of the PA behavior. Code-division multiple-access and third-generation standard signals applying different stress level on the PA are used to evaluate the performance of the linearizer. The system is validated using digital signal processing/RF co-simulation for a typical 44-dBm class-AB PA. To estimate the performance of the linearizer under realistic condition, experimental results have been carried out in open-loop condition, supported by a software-instruments connectivity, for a 20-W class-AB PA operating at 1.96 GHz. Results for different cases of standards signals reveal a significant reduction, in the order of 5 dB, in effective output power backoff.
Sponsorship	IEEE Microwave Theory and Techniques Society
Starting Page	2139
Ending Page	2147
Page Count	9
File Size	422467
File Format	PDF
ISSN	00189480
Volume Number	52
Issue Number	9
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Predistortion Digital signal processing Base stations Power amplifiers Radio frequency Radiofrequency amplifiers Baseband Receivers Multiaccess communication Code standards
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering Radiation

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