DocumentCode :
1852422
Title :
Predistort-linearisation method for future basestation amplifiers of cellular radio
Author :
Ata, Osama W.
Author_Institution :
Dept. of Electr. & Electron. Eng., Victoria Univ. of Technol., Melbourne, Vic., Australia
Volume :
3
fYear :
1996
fDate :
18-22 Nov 1996
Firstpage :
1592
Abstract :
Linearisation of a radio basestation amplifier using a third order and a fifth order predistortion scheme is studied. Adaptive predistortion using a third order predistorter improved the amplifiers intermodulation distortion by between 6.5 dB and 30 dB as measured by a two tone test. The variation in improvement is due to changes in the input power level. Improvement increases as the input power is backed off from the 1 dB compression point. A fifth order predistorter will give an IMD improvement of between 9 dB and 48 dB if properly adjusted. For a nine-tone test (with uniformly distributed random phase), a fifth order predistorter, if properly adapted will give an IMD improvement of between 8.5 dB and 40 dB from the worst IMD level, provided by the raw nonlinear amplifier
Keywords :
cellular radio; intermodulation distortion; land mobile radio; linearisation techniques; power amplifiers; radiofrequency amplifiers; IMD; adaptive predistortion; basestation amplifiers; cellular radio; fifth order predistorter; fifth order predistortion; input power level; intermodulation distortion; nine-tone test; nonlinear amplifier; power amplifier; predistort-linearisation method; third order predistorter; third order predistortion; two tone test; uniformly distributed random phase; High power amplifiers; Land mobile radio cellular systems; Mathematical model; Mobile communication; Polynomials; Power amplifiers; Predistortion; Quadrature amplitude modulation; Testing; Voltage;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Global Telecommunications Conference, 1996. GLOBECOM '96. 'Communications: The Key to Global Prosperity
Conference_Location :
London
Print_ISBN :
0-7803-3336-5
Type :
conf
DOI :
10.1109/GLOCOM.1996.591909
Filename :
591909
Link To Document :
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