Radio-frequency (RF) multipliers (FreqXs) are promising devices for wideband signal generation, as they eliminate the need for a local oscillator (LO) and can operate with wide signal bandwidths (BWs). However, modeling and linearization tools specifically designed for FreqXs are essential to accurately describe and compensate for their inherent nonlinear behavior. In this paper, the dynamic-deviation reduction (DDR) Volterra modeling approach is applied to an off-the-shelf frequency doubler. The experiments are conducted using a vector network analyzer (VNA) equipped with modern signal analysis, which allowed to extract and validate the cross-harmonic DDR model at 39 GHz output carrier frequency. Finally, DDR-based digital predistortion (DPD) reached unequalized error vector magnitude (EVM) down to less than 5% for a 256-QAM modulation with 100-MHz BW.
Alsarraf, A.H., Gibiino, G.P., Schreurs, D. (2025). Assessment of Dynamic Deviation Reduction-Based Volterra Modeling and Digital Predistortion of RF Passive Doubler. 345 E 47TH ST, NEW YORK, NY 10017 USA : Institute of Electrical and Electronics Engineers Inc. [10.1109/INMMIC64198.2025.10975716].
Assessment of Dynamic Deviation Reduction-Based Volterra Modeling and Digital Predistortion of RF Passive Doubler
Gibiino G. P.;Schreurs D.
2025
Abstract
Radio-frequency (RF) multipliers (FreqXs) are promising devices for wideband signal generation, as they eliminate the need for a local oscillator (LO) and can operate with wide signal bandwidths (BWs). However, modeling and linearization tools specifically designed for FreqXs are essential to accurately describe and compensate for their inherent nonlinear behavior. In this paper, the dynamic-deviation reduction (DDR) Volterra modeling approach is applied to an off-the-shelf frequency doubler. The experiments are conducted using a vector network analyzer (VNA) equipped with modern signal analysis, which allowed to extract and validate the cross-harmonic DDR model at 39 GHz output carrier frequency. Finally, DDR-based digital predistortion (DPD) reached unequalized error vector magnitude (EVM) down to less than 5% for a 256-QAM modulation with 100-MHz BW.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
