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A hermite interpolated LUT for RF power amplifiers


Selvadurai, Dinaagaren and Mohd Sidek, Roslina and Al-Hussaini, Khalid Taher Mohammed and Mohd Ali, Borhanuddin (2017) A hermite interpolated LUT for RF power amplifiers. Pertanika Journal of Science & Technology, 25 (spec. Feb.). pp. 299-306. ISSN 0128-7680; ESSN: 2231-8526

Abstract / Synopsis

Digital predistortion is one of the most widely used techniques to linearize a power amplifier (PA) to reduce the error vector magnitude (EVM) distortion and spectral regrowth. By far, the lookup table (LUT) predistorters are most frequently used scheme to mitigate the effects of non-linear power amplifier. In this paper, a new algorithm of joint-polynominal LUT predistorter which attains the best linearization performance is proposed. The algorithm employs the hermite interpolation LUT, which has a higher accuracy of interpolation. Simulation results show that the proposed method provides a better rejection of EVM distortion and an improvement of 30-40% of adjacent channel leakage ratio (ACLR) for the wideband code division multiple access at a minimal memory usage.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
Publisher: Universiti Putra Malaysia Press
Keywords: Predistortion; Linearization; Lookup table; Power amplifier; Non-linear distortion
Depositing User: Nabilah Mustapa
Date Deposited: 30 Jun 2017 17:52
Last Modified: 05 Jul 2017 11:29
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