Title :
Unconditionally convergent pre-distortion of non-linear high power amplifiers
Author :
Sala, Josep ; Durney, Hugo
Author_Institution :
Dept. of Signal Theor. & Commun., Univ. Politecnica de Catalunya, Barcelona, Spain
Abstract :
The use of high power amplifiers (HPA) in digital communications is plagued with non-linear (AM/AM and AM/PM) distortion. This is specially acute for those modulations that are not constant amplitude, such as OFDM or MQAM. We present a pre-distortion algorithm that, in contrast to previously researched architectures, is unconditionally convergent
Keywords :
OFDM modulation; amplitude modulation; convergence of numerical methods; nonlinear distortion; phase modulation; power amplifiers; probability; quadrature amplitude modulation; radiofrequency amplifiers; AM/AM distortion; AM/PM distortion; MQAM; OFDM; adaptive filtering algorithms; convergence properties; digital communications; nonlinear distortion; nonlinear high power amplifiers; predistortion algorithm; probability density functions; unconditionally convergent predistortion; Amplitude modulation; Context; Costs; Digital communication; Digital signal processing; High power amplifiers; Nonlinear distortion; OFDM modulation; Signal processing; Signal processing algorithms;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd
Conference_Location :
Rhodes
Print_ISBN :
0-7803-6728-6
DOI :
10.1109/VETECS.2001.944974
