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Digital Pre-distortion of Power
Amplifiers using look-Up Table Method with Memory
Effects
Amandeep Singh
Sappal*, Manjit Singh Patterh *, Sanjay Sharma **
(*)University
College of Engineering,
Punjabi University, Patiala, India, (**)
Thapar University,
Patiala, India
Abstract Digital pre-distortion techniques are widely used in linearization of RF power amplifiers. Due to frequency dependence of thermal constants of the active devices or components in the biasing network, power Amplifiers also exhibits memory effects. Thus digital pre-distortion technique should also be able to suppress these memory effects. In this paper Look-Up Table (LUT) type Adaptive Digital pre-Distortion (ADPD) is presented. In this algorithm, an output signal of the Power Amplifier (PA) is used as reference signal. This reference signal is used to update the coefficients of the LUT, so that characteristics of the PA, such as temperature dependence, do not have influence on the convergence performances. Simulation results have been presented. Keywords: Coordinate Rotation Digital Computer (CORDIC), Digital pre-distortion (DPD), Error Vector Magnitude (EVM), Look Up Table (LUT), Power Amplifier (PA).
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@ARTICLE{P1170851537, AUTHOR = { Amandeep Singh Sappal and Manjit Singh Patterh and Sanjay Sharma}, TITLE = {Digital Pre-distortion of Power Amplifiers using look-Up Table Method with Memory Effects },
JOURNAL = {ICGST International Journal on Programmable
Devices, Circuits and Systems, PDCS},
YEAR = {2008}, VOLUME = {8}, ISSUE ={1}, PAGES={39--44} }
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