Digital Predistortion of Power Amplifiers for Wireless Applications
نویسندگان
چکیده
For my family. iii ACKNOWLEDGEMENTS It is time to draw a period to my PhD endeavor. I feel extremely lucky to meet so many talented people during these years. I am grateful for their friendship, help, encouragement, and support. First, I would like to thank my advisor, Dr. G. Tong Zhou, for providing this opportunity for me to study at Georgia Tech. Her constant encouragement and valuable advices are essential for the completion of this thesis. I will be always inspired by the high standards she sets for herself and her sharp focus and deep devotion to whatever she works on.
منابع مشابه
FPGA Implementation of a Hammerstein Based Digital Predistorter for Linearizing RF Power Amplifiers with Memory Effects
Power amplifiers (PAs) are inherently nonlinear elements and digital predistortion is a highly cost-effective approach to linearize them. Although most existing architectures assume that the PA has a memoryless nonlinearity, memory effects of the PAs in many applications ,such as wideband code-division multiple access (WCDMA) or orthogonal frequency-division multiplexing (OFDM), can no longer b...
متن کاملDigital Predistortion of Power Amplifiers for Multichannel Wireless Systems
An LDMOS RF high power amplifier with improved intermodulation distortion performance using digital predistortion is presented. The application of digital linearization method is being tested with the help of circuit simulation software ADS.
متن کاملLinearizing Power Amplifiers Using Digital Predistortion, EDA Tools and Test Hardware
This article presents a method for power amplifier linearization known as baseband adaptive digital predistortion. Using an EDA software package with both DSP (Digital Signal Processing) and RF capabilities, connected to a vector signal generator and a signal analyzer, this hardware/software connected system allows an actual hardware power amplifier to be optimally linearized for a specific wir...
متن کاملAdaptive Predistortion Linearization in Modern Communication Systems
This paper is focusing on the nondesirable nonlinear effects of power amplifiers for wireless communication. One of the most-used methods for amplifier nonlinearities reducing – digital baseband adaptive predistortion is presented.
متن کاملDigital predistortion of power amplifiers using look-up table method with memory effects for LTE wireless systems
Digital predistortion (DPD) techniques are widely used to linearize of RF power amplifiers. In this article, a memory polynomial-based power has been modeled with memory order of 5 and nonlinearity order of 9. These specifications had been found suitable for advanced long-term evolution (LTE) wireless systems. A suitable DPD model was created based on the least square error minimization. Result...
متن کاملSynergistic Design of DSP and Power Amplifiers for Wireless Communications
Co-design of digital signal-processing (DSP) algorithms and power-amplifier characteristics can lead to improved efficiency and linearity through a variety of strategies including: predistortion, DSP control over bias conditions, particularly the power supply voltage, and DSP generation of digital input signals for switching amplifiers. This paper discusses several amplifier architectures that ...
متن کامل