Title :
W-CDMA power amplifier modeling
Author :
McBeath, S.M. ; Pinckley, D.T. ; Cruz, J.R.
Author_Institution :
Motorola Labs., Fort Worth, TX, USA
fDate :
6/23/1905 12:00:00 AM
Abstract :
This paper discusses a simple yet accurate approach for modeling W-CDMA power amplifiers. Several stages of the modeling process are presented. First, the test signals are defined. W-CDMA signals are approximated using simple periodic signals. These signals are then used as inputs to the power amplifier (PA) measurement system. Second, a process for deriving the AM/AM and AM/PM characteristics is given. The AM/AM and AM/PM characteristics, which are derived directly from the measured PA data, are used as the basis for modeling. The tapped-delay-line (TDL) model is used to model the AM/AM and AM/PM characteristics. The TDL model is accurate to -40 dB when linear filters are inserted before and after the AM/AM and AM/PM characteristics are modeled
Keywords :
UHF power amplifiers; amplitude modulation; broadband networks; code division multiple access; pulse modulation; radio equipment; AM/AM; AM/PM; TDL model; W-CDMA power amplifier modeling; linear filters; periodic signals; tapped-delay-line model; test signals; Bandwidth; Distortion measurement; Frequency; Gain measurement; High power amplifiers; Multiaccess communication; Phase measurement; Power amplifiers; Power system modeling; Signal processing;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Fall. IEEE VTS 54th
Conference_Location :
Atlantic City, NJ
Print_ISBN :
0-7803-7005-8
DOI :
10.1109/VTC.2001.957144
