Title :
Digital filtering for power amplifiers linearization
Author :
Leulescu, O. ; Petrescu, Teodor ; Petrescu, Teodor
Author_Institution :
Telecommun. & Inf. Technol., Univ. Politeh. of Bucharest, Bucharest
Abstract :
OFDM signals exhibit a high peak-to-average power ratio which will generate nonlinear distortion and consequently will decrease the high power amplifier efficiency. Therefore, predistortion technics are suitable for linearizing nonlinear power amplifiers comportment when such complex signals are used. This paper presents a digital predistortion approach for the power amplifier linearization when Volterra series are used for dynamic nonlinear modeling of the power amplifier behavior. An implementation of the digital nonlinear predistorter system based on digital filters is proposed.
Keywords :
OFDM modulation; Volterra series; digital filters; nonlinear distortion; power amplifiers; OFDM signals; Volterra series; digital filtering; digital nonlinear predistorter system; digital predistortion approach; dynamic nonlinear modeling; high peak-to-average power ratio; nonlinear distortion; power amplifiers linearization; predistortion techniques; Digital filters; Filtering; Nonlinear distortion; OFDM; Peak to average power ratio; Power amplifiers; Power filters; Power generation; Predistortion; Signal generators;
Conference_Titel :
Circuits and Systems, 2008. ISCAS 2008. IEEE International Symposium on
Conference_Location :
Seattle, WA
Print_ISBN :
978-1-4244-1683-7
Electronic_ISBN :
978-1-4244-1684-4
DOI :
10.1109/ISCAS.2008.4541933
