Title :
Piecewise Complex Circular Approximation of the Inverse Characteristics of Power Amplifiers for Digital Predistortion Techniques
Author :
Hussein, Mazen Abi ; Wang, Yide ; Feuvrie, Bruno ; Toutain, Serge ; Peyresoubes, Georges
Author_Institution :
Ecole Polytech., Univ. of Nantes, Nantes
fDate :
June 29 2008-July 5 2008
Abstract :
This paper deals with the linearization of power amplifier characteristics by digital predistortion technique. A new approach for the implementation of the memoryless digital predistorter (PD) is proposed. It consists on using a Look-Up-Table with few entries corresponding to large step segmentation of the amplitude range of the baseband input signal. A new modeling approach was also presented. For every segment, a complex circular model was used to approximate the inverse AM/AM and AM/PM characteristics of the PA. The performance of this new modeling approach is evaluated through computer simulations.
Keywords :
approximation theory; linearisation techniques; power amplifiers; table lookup; complex circular model; computer simulations; digital predistortion; inverse characteristics; linearization; look-up-table; piecewise complex circular approximation; power amplifiers; Baseband; Bit error rate; Broadband amplifiers; Costs; Mathematical model; Nonlinear distortion; Polynomials; Power amplifiers; Predistortion; Table lookup;
Conference_Titel :
Digital Telecommunications, 2008. ICDT '08. The Third International Conference on
Conference_Location :
Bucharest
Print_ISBN :
978-0-7695-3188-5
Electronic_ISBN :
978-0-7695-3188-5
DOI :
10.1109/ICDT.2008.33
