Abstract:
In this paper, the author researches the problem of the analysis and optimization of broadband digital predistortion. In the development process of mobile communication system, improving the transmission quality and spectral efficiency always acts as a main research focus. As the traditional multi-carrier modulation system has broadband linear modulating signals with high Peak-to-Average Power Ratio (PAPR), which would cause nonlinear distortion and memory effects after the amplification of RF power amplifier. In order to solve this problem, the author proposes a digital pre-distortion method based on broadband self-adaptivity, updates and optimizes the parameters of pre-distorter with improved self-adaptive algorithm. The simulation results prove that the predistorter could improve the spectrum out of band for about 12dB through the self-adaptive algorithm, which effectively compensates the nonlinear distortion and memory effects of amplifier and improves the efficiency of the digital wireless receiver.
Page(s):
515-519
DOI:
DOI not available
Published:
Journal: Journal of Theoretical and Applied Information Technology, Volume: 45, Issue: 2, Year: 2012