Title :
Hammerstein predistorter for high power RF amplifiers in OFDM transmitters
Author :
Sadeghpour, Tahereh ; Karkhaneh, Haleh ; Abd-Alhameed, Raed ; Ghorbani, Ayaz ; Elfergani, I.T.E. ; Dama, Y.A.S.
Author_Institution :
Sch. of Eng., Design & Technol., Bradford Univ., Bradford, UK
Abstract :
OFDM (Orthogonal Frequency-Division Multiplexing) is a wideband digital modulation scheme which is critically dependent on linearity in the hardware system, due to its reliance on Fourier Transformation and its inherently high peak-to-average power ratio (PAPR), and minimization of nonlinearity is thus a priority. In this paper the effectiveness of a predistortion based on the Hammerstein model dealing with the nonlinear response is investigated by measurement of Error Vector Magnitude (EVM) in AWGN channel and Adjacent Channel Power Ratio (ACPR). Accuracy of prediction of Power Amplifier (PA) nonlinearity with memory effect and baseband predistorter is investigated by the experimental results.
Keywords :
AWGN channels; OFDM modulation; nonlinear distortion; power amplifiers; radiofrequency amplifiers; AWGN channel; Fourier transformation; Hammerstein model; Hammerstein predistorter; OFDM transmitters; adjacent channel power ratio; error vector magnitude; high power RF amplifiers; nonlinear response; power amplifier nonlinearity; wideband digital modulation scheme; Convergence; Finite impulse response filter; Maximum likelihood detection; Nonlinear filters; OFDM; Radio frequency; Transmitters;
Conference_Titel :
General Assembly and Scientific Symposium, 2011 XXXth URSI
Conference_Location :
Istanbul
Print_ISBN :
978-1-4244-5117-3
DOI :
10.1109/URSIGASS.2011.6050499
