A
Alberto Brihuega
Researcher at Tampere University of Technology
Publications - 31
Citations - 393
Alberto Brihuega is an academic researcher from Tampere University of Technology. The author has contributed to research in topics: Predistortion & Nonlinear distortion. The author has an hindex of 8, co-authored 27 publications receiving 179 citations.
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Journal ArticleDOI
Digital Predistortion for Hybrid MIMO Transmitters
TL;DR: A novel DPD processing and learning technique for an antenna subarray is proposed, which utilizes a combined signal of the individual power amplifier outputs in conjunction with a decorrelation-based learning rule, which results in minimizing the nonlinear distortions in the direction of the intended receiver.
Journal ArticleDOI
Piecewise Digital Predistortion fo mmWave Active Antenna Arrays: Algorithms and Measurements
Alberto Brihuega,Mahmoud Abdelaziz,Lauri Anttila,Matias Turunen,Markus Allen,Thomas Eriksson,Mikko Valkama +6 more
TL;DR: The proposed PW-CL DPD is shown to outperform the state-of-the-art PW DPD based on the indirect learning architecture, as well as the classical single-polynomial-based DPD solutions in terms of linearization performance and computational complexity by a clear margin.
Journal ArticleDOI
Digital Predistortion for Multiuser Hybrid MIMO at mmWaves
Alberto Brihuega,Lauri Anttila,Mahmoud Abdelaziz,Thomas Eriksson,Fredrik Tufvesson,Mikko Valkama +5 more
TL;DR: In this article, the authors carried out detailed signal and distortion modeling in broadband multi-user hybrid MIMO systems, with a bank of nonlinear PAs in each subarray, while also taking the inevitable crosstalk between the antenna/PA branches into account.
Journal ArticleDOI
Gradient-Adaptive Spline-Interpolated LUT Methods for Low-Complexity Digital Predistortion
Pablo Pascual Campo,Alberto Brihuega,Lauri Anttila,Matias Turunen,Dani Korpi,Markus Allen,Mikko Valkama +6 more
TL;DR: The results show that the linearization capabilities of the proposed methods are very close to that of the ordinary MP DPD, particularly with the proposed SMP approach, while having substantially lower processing complexity.
Journal ArticleDOI
Neural-Network-Based Digital Predistortion for Active Antenna Arrays Under Load Modulation
TL;DR: A dense neural network is considered that is capable of modeling the correlation between the nonlinear distortion characteristics among different beams, which allows providing consistently good linearization regardless of the beamforming direction, thus avoiding the necessity of executing continuous digital predistortion parameter learning.