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Digital Predistortion Algorithm using Techniques of Temperature Compensation  

Ko, Young-En (Dept. of Electronics Eng. Dankook University)
Bang, Sung-Il (Dept. of Electronics Eng. Dankook University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.42, no.9, 2005 , pp. 1-10 More about this Journal
Abstract
In this paper, we proposed predistortion algerian that can compensate temperature distortion by digital. Predistortion algorithm produces compensation value of distortion by temperature as well as system nonlinear distortion by input level, and warps beforehand signal of baseband. To prove excellency of such algorithm we applied predistortion algorithm to Saleh's high power amplifier model, and did computer simulation. As a result, P1dB increased about 0.5 dBm phase shift reduced about $0.8^{o}$ than existent the A&P PD, and predistiortion algorithm to apply temperature compensation techniques improved P1dB about 2dBm and stabilized phase shift by about $0.1^{o}$ low. When approved UMTS's sample signal to this amplifier, IMD3 of amplifier decreased 10dBm than is no temperature compensation techniques, and reduced 19dBm than signal that is no distortion.
Keywords
Predistorter; Temperature compensation;
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