An Improved Rational Model with Memory for the Digital Baseband Predistortion of Power Amplifier

2015 ◽  
Author(s):  
Victor Francisco ◽  
Eduardo Lima
Keyword(s):  
Power Amplifier ◽  
Rational Model ◽  
With Memory ◽  
Digital Baseband

Design of Predistorter with Efficient Updating Algorithm of Power Amplifier with Memory Effect

2012 ◽  
Vol E95-C (3) ◽  
pp. 382-394
Author(s):  
Yasuyuki OISHI ◽  
Shigekazu KIMURA ◽  
Eisuke FUKUDA ◽  
Takeshi TAKANO ◽  
Daisuke TAKAGO ◽  
...  
Keyword(s):  
Memory Effect ◽  
Power Amplifier ◽  
With Memory

Research on Modeling Methods of Power Amplifier with Memory Effect in Broadband Communication

2014 ◽  
Vol 687-691 ◽  
pp. 4060-4063
Author(s):  
Lu Sun ◽  
Long Long Xue ◽  
Jia Li Wang ◽  
Chun Yang Zhou
Keyword(s):  
Memory Effect ◽  
Power Amplifier ◽  
Polynomial Model ◽  
Behavioral Modeling ◽  
Design System ◽  
Behavioral Models ◽  
Electric Characteristic ◽  
Memory Polynomial ◽  
With Memory ◽  
Frequency Power

Memory effect of power amplifier (PA) due to broadband signals which adopt new modulation technique is becoming obvious, and worsening the linearity of PA. Behavioral modeling for RF (Radio Frequency) power amplifier is indispensable to design digital pre-distortion system by which we can promote the efficiency of PA. According to the simulation data in the software of ADS (Advanced Design System), behavioral models of MRF21085 amplifier can be established by MATLAB. Comparison of memory polynomial model and ADS simulation of MRF21085 amplifier demonstrate memory polynomial model can represent the electric characteristic of it exactly.

On Adaptive Identification Algorithm for PA Linearization

2010 ◽  
Vol 29-32 ◽  
pp. 1268-1273
Author(s):  
Huan Li ◽  
Cheng Sheng Pan ◽  
Yu Zhang ◽  
Bo Ren
Keyword(s):  
Computer Simulation ◽  
Theoretical Analysis ◽  
Power Amplifier ◽  
Lms Algorithm ◽  
Identification Algorithm ◽  
Digital Predistortion ◽  
Adaptive Identification ◽  
Amplifier Model ◽  
Nonlinear Amplification ◽  
With Memory

According to the nonlinear amplification characteristic with memory effection of power amplifier(PA) in WCDMA systems, we have analyzed the structure of Wiener digital predistortion system in which Hammerstein power amplifier model with memory is adopted. LR algorithm and LMS algorithm were used respectively to identify and update parameters of Wiener predistortion system. An LR / LMS identification algorithm is proposed for syetem adaptive Identification. The method has a very good suppression of signal spectral regrowth. Theoretical analysis and computer simulation verified the effectiveness and practicability of the algorithm.

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