Power Amplifier Linearization Using Digiital Predistortion
نویسندگان
چکیده
For wideband or high power applications, the power amplifier exhibits memory effects, for which memory less predistorters can achieve only limited linearization performance. The memory polynomial predistorter can correct both the nonlinear distortions and the linear frequency response that may exist in the power amplifier. It is a robust predistorter, which has demonstrated good performance on several nonlinear system models. The predistorter models considered in this paper include both evenand odd order nonlinear terms. Here, the benefits to include evenorder nonlinear terms in both the baseband power amplifier and predistorter models are
منابع مشابه
Power Amplifier Linearization Using Six-port Receiver for DVB-S2 Satellite Communications
A digital look-up table adaptive predistortion technique using a six-port receiver for power amplifier linearization is presented. The system is designed in Ka-band for a DVB-S2 satellite link. We use a six-port receiver at the linearizationloop in place of classic heterodyne receivers. The six-port receiver is implemented by the use of passive microwavecircuits and detector diodes. This approa...
متن کاملOverview On The Modeling And Digital Linearization Of Power Amplifiers
In modern transmitting devices the digital predistortion technique is widely used for linearizing the power amplifier. There are many algorithms realizing predistortion technique with a different complexity and a stability of results. The several methods are described and compared. The orthogonal polynomials with memory were has proved to be simple enough with suitable results, so it was chosen...
متن کاملOverview of Power Amplifier Linearization Based on Predistorsion Techniques
An overview of digital predistortion techniques for microwave power amplifier linearization is here presented. Different predistortion approaches are considered, and both static and dynamic (memory effects) behavioral models are presented. Special focus is done to the most suitable solutions for facing the new challenge to linearize high-bandwidth amplifiers, as demands most of the new telecomm...
متن کاملFPGA 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 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 کامل