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• W4212872335 endingPage "2083" @default.
• W4212872335 startingPage "2070" @default.
• W4212872335 abstract "In this paper, a low complexity moving average nested generalized memory polynomial model (MAN-GMP) is proposed for digital predistortion (DPD) of broadband power amplifiers (PAs). As the signal bandwidth increases drastically, the strong nonlinear distortions, especially those induced by the memory effect, are generated from the highly efficient PAs. To compensate for the strong memory effect, a moving average nested envelope memory polynomial (MAN-EMP) model is derived from an accuracy-enhanced GMP model, which offers reduced complexity while suffering from degraded modeling accuracy. The MAN-GMP model is further proposed to improve the modeling accuracy by connecting several memory branches of the MAN-EMP model in parallel. An iterative algorithm is designed to extract the model coefficients efficiently through only one or two iterations. Experimental measurements are carried out on two sub-7 GHz broadband GaN Doherty PAs with up to 200 MHz bandwidth OFDM signals to benchmark the proposed MAN-GMP model against the GMP, the parallel-LUT-MP-EMP (PLUME), the augmented complexity-reduced GMP (ACR-GMP), the generalized twin-nonlinear two-box (GTNTB), and the enhanced Wiener models. The experimental results show that the MAN-GMP model can effectively compensate for the nonlinear distortion of broadband PAs with significant complexity reduction." @default.
• W4212872335 created "2022-02-24" @default.
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• W4212872335 date "2022-05-01" @default.
• W4212872335 modified "2023-09-30" @default.
• W4212872335 title "A Low Complexity Moving Average Nested GMP Model for Digital Predistortion of Broadband Power Amplifiers" @default.
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• W4212872335 doi "https://doi.org/10.1109/tcsi.2022.3150408" @default.
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