Title :
A Modified Adaptive Pre-distorter for Power Amplifier in OFDM Systems
Author :
Qin, Chuan ; Chang, Tianhai ; Liu, Lintong
Author_Institution :
Sch. of Electron. & Inf. Eng., South China Univ. of Technol., Guangzhou, China
Abstract :
This paper focus on the LUT based digital pre-distortion techniques for non-linear power amplifier in OFDM systems. Compared with the conventional adaptive pre-distortion method, a modified method is proposed, which utilizes interpolation algorithm, with a consideration of the amplitude distribution characteristic of OFDM symbols. The performances of the conventional and modified algorithms are compared in terms of the simulation results and analysis, which demonstrates the performance of the modified method is more outstanding.
Keywords :
OFDM modulation; distortion; interpolation; power amplifiers; LUT based digital predistortion techniques; OFDM systems; amplitude distribution; interpolation algorithm; modified adaptive predistorter; nonlinear power amplifier; power amplifier; Analytical models; Mobile communication; Mobile computing; Nonlinear distortion; OFDM; Peak to average power ratio; Power amplifiers; Power engineering computing; Predistortion; Table lookup; Adaptive; Interpolation algorithm; OFDM symbols; Pre-distorter;
Conference_Titel :
Communications and Mobile Computing (CMC), 2010 International Conference on
Conference_Location :
Shenzhen
Print_ISBN :
978-1-4244-6327-5
Electronic_ISBN :
978-1-4244-6328-2
DOI :
10.1109/CMC.2010.20
