Joint dual-input digital predistortion of supply-modulated RF PA by surrogate-based multi-objective optimization
A generalized dual-input digital predistortion (DPD) methodology for supply-modulated (SM)
power amplifiers (PAs) is proposed. Contrary to classical approaches, the SM and the radio …
power amplifiers (PAs) is proposed. Contrary to classical approaches, the SM and the radio …
Leveraging Mutual Coupling in Antenna-Amplifier Systems for Increased Reconfigurability
J Kalde, VP Kutinlahti, A Lehtovuori… - IEEE Journal of …, 2024 - ieeexplore.ieee.org
Traditional antenna array design aims at minimising the mutual coupling between the
elements. When elements are fully isolated, the active impedance seen by the amplifiers …
elements. When elements are fully isolated, the active impedance seen by the amplifiers …
Wideband active load–pull by device output match compensation using a vector network analyzer
This work investigates wideband active load-pull (WALP) on microwave electron devices
with a standard vector network analyzer (VNA), solely using calibrated frequency-domain …
with a standard vector network analyzer (VNA), solely using calibrated frequency-domain …
GaN power amplifier digital predistortion by multi-objective optimization for maximum RF output power
While digital predistortion (DPD) usually targets only the linearity performance of the radio–
frequency (RF) power amplifier (PA), this work addresses more than a single PA …
frequency (RF) power amplifier (PA), this work addresses more than a single PA …
Multitone multiharmonic scattering parameters for the characterization of nonlinear networks
This work describes a generalized multitone multiharmonic scattering parameters (M2S-
parameters) measurement approach suitable for multiport nonlinear network …
parameters) measurement approach suitable for multiport nonlinear network …
Combined wideband active load-pull and modulation distortion characterization with a vector network analyzer
We present a demonstrator set-up for amplifier error-vector magnitude (EVM)
characterization in the presence of wideband load termination arbitrarily set by the user …
characterization in the presence of wideband load termination arbitrarily set by the user …
Antenna array driven by non-isolated power amplifiers for MIMO applications
In this paper, the effect of antenna coupling in an active array on the integrated power
amplifiers (PAs) is studied. It is found that for multiple-input multiple-output (MIMO) …
amplifiers (PAs) is studied. It is found that for multiple-input multiple-output (MIMO) …
Sparse estimation technique for digital pre-distortion of impedance-mismatched power amplifiers
CS Hemsi, CM Panazio - Circuits, Systems, and Signal Processing, 2021 - Springer
This paper proposes the application of the Wiener–Hammerstein with feedback (WHFB)
model as a digital pre-distortion (DPD) behavioural model for power amplifiers (PA) under …
model as a digital pre-distortion (DPD) behavioural model for power amplifiers (PA) under …
An Augmented Time-Domain Poly-Harmonic Distortion Model for Digital Predistortion of Power Amplifiers With Severe Load Mismatch
X Liu, H Jia, Z Duan, X Ma, Y Lu, T Feng… - IEEE Microwave and …, 2024 - ieeexplore.ieee.org
Compensating for the nonlinear distortion of power amplifiers (PAs) with load mismatch is a
tricky task, especially when the voltage standing wave ratio (VSWR) is higher than 3. This …
tricky task, especially when the voltage standing wave ratio (VSWR) is higher than 3. This …
Efficient implementation of a modified‐Volterra radio‐frequency power amplifier nonlinear dynamic model by global rational functions approximation
AM Angelotti, GP Gibiino… - International Journal of RF …, 2020 - Wiley Online Library
Power amplifiers (PAs) used in modern radio frequency transmitters for communications
display significant nonlinear dynamic effects under typical operating regimes. Accurate and …
display significant nonlinear dynamic effects under typical operating regimes. Accurate and …