Title :
Novel adaptive linearization for digitally modulated multi-carrier power amplifier using pre-distorter cum cross-correlator (PDCC)
Author :
Chia, Y.W.M. ; Zou, Y. ; Ko, C.C.
Author_Institution :
Centre for Wireless Commun., Nat. Univ. of Singapore, Singapore
Abstract :
We have rigorously analysed and developed a novel adaptive predistorter cum cross-correlator to linearize the distortions due to a power amplifier for multi-carrier (MC) digitally modulated signals. The cross-correlator extracts the in-band and out-band intermodulation distortions which are exploited by the predistorter for linearization. Improvements in carrier/intermodulation (C/I), noise-power-ratio (NPR) and time domain are reported.
Keywords :
UHF power amplifiers; cellular radio; code division multiple access; correlators; intermodulation distortion; personal communication networks; power combiners; adaptive linearization; carrier/intermodulation; digitally modulated multi-carrier power amplifier; distortions; in-band intermodulation distortion; noise-power-ratio; out-band intermodulation distortion; pre-distorter cum cross-correlator; time domain; Correlators; Digital modulation; Filters; Frequency; Multiaccess communication; Nonlinear distortion; Power amplifiers; Signal analysis; Signal processing; Wireless communication;
Conference_Titel :
Microwave Symposium Digest, 1999 IEEE MTT-S International
Conference_Location :
Anaheim, CA, USA
Print_ISBN :
0-7803-5135-5
DOI :
10.1109/MWSYM.1999.780330
