Title :
Digital predistorter for 64QAM modulation based on FPGA device
Author :
Pochmara, Janusz ; Katarzynski, Piotr
Author_Institution :
Dept. of Comput. Eng., Poznan Univ. of Technol., Poznan, Poland
Abstract :
This paper presents a predistortion technique compensating for nonlinear distortions caused by HPA (High Power Amplifier) in an QAM (Multilevel Quadrature Modulation) system. Investigations were held both with software and hardware tools. It is confirmed by computer simulation that proposed approach produces a faster convergence speed than traditional computer performed algorithms. Predistortion technique based on programmable logic device is a very attractive from the implementation point of view, because of a low amount of required RAM and rapid convergence from a blind start.
Keywords :
amplifiers; digital simulation; field programmable gate arrays; mobile communication; nonlinear distortion; quadrature amplitude modulation; telecommunication computing; 64QAM modulation; computer simulation; digital predistorter; field programmable gate array; high power amplifier; multilevel quadrature modulation; nonlinear distortions; predistortion technique; programmable logic device; Field programmable gate arrays; Mathematical model; Nonlinear distortion; Predistortion; Quadrature amplitude modulation; Table lookup; Testing; FPGA; HPA; RF systems; digital predistortion;
Conference_Titel :
Mixed Design of Integrated Circuits and Systems (MIXDES), 2010 Proceedings of the 17th International Conference
Conference_Location :
Warsaw
Print_ISBN :
978-1-4244-7011-2
Electronic_ISBN :
978-83-928756-4-2
