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Projecte llegit

Títol: Enhanced Digital Predistortion Linearization for Multi-User Beamforming in MIMO Transceivers for Satellite Communications

Estudiants que han llegit aquest projecte:

Director/a: GILABERT PINAL, PERE LLUÍS

Departament: TSC

Títol: Enhanced Digital Predistortion Linearization for Multi-User Beamforming in MIMO Transceivers for Satellite Communications

Data inici oferta: 30-01-2025     Data finalització oferta: 30-09-2025


Estudis d'assignació del projecte:
    MU AEROSPACE S&T 21
    MU AI4CI
    MU DRONS
    MU EM CODAS 1
    MU MASTEAM 2015
Tipus: Individual
 
Lloc de realització: EETAC
 
Paraules clau:
Digital predistortion, Beamforming, Power amplifier
 
Descripció del contingut i pla d'activitats:
This project is aimed at addressing technological challenges in designing B5G MIMO transceivers across high-bandwidth operative frequency ranges, focusing on:
' Maintaining the linearity of high-bandwidth signals, which is essential for supporting high transmission rates.
' Enhancing energy and computational efficiency in densely deployed base stations, particularly in mm-wave or cm-wave communications.
' Meeting linearity requirements in MIMO architectures while implementing beamforming to enhance capacity and minimize interference.
' Characterizing and pre-compensating for distortion sources at the transmitter using DPD techniques.
' Designing computationally efficient implementations of ML-based solutions with hardware acceleration, such as GPUs and FPGAs.
In the initial phase, our objective is to develop a Matlab simulator capable of emulating DPD linearization of MIMO and beamforming techniques specifically tailored for OFDM and single carrier M-QAM and M-PSK modulation schemes. This enhancement will involve deriving simulation inputs that accurately represent the real-world nonlinear behavior of PAs.
The simulator will enable us to evaluate DPD performance more efficiently in terms of resource utilization and energy consumption. To ensure the validity of the design, we will incorporate data obtained from actual transmission and reception conducted using a real PA.
To achieve this, we will collect comprehensive data reflecting the performance characteristics of PA with distinct modulation schemes, including their nonlinear distortion profiles, efficiency, and response under different operating conditions. This data will be critical in refining the simulator's model to produce realistic simulations of how MIMO and beamforming techniques interact with PA characteristics.
 
Overview (resum en anglès):
The goal of this master thesis is to demonstrate the effectiveness of digital predistortion (DPD) techniques in making radio frequency (RF) transmitters used in active antenna arrays on board satellites more linear. These arrays include power amplifiers (PAs), which are essential to satellite communication systems. The project seeks to linearize these PAs to reduce in-band and out-of-band distortions, which commonly impact signal quality and system performance. Proper linearization is essential for maintaining high-quality communication links, ensuring compliance with spectral regulations, and mitigating reception errors. A specialized simulation tool named DPD4MIMO was created to evaluate various methods and strategies developed during the project. The simulator emulates a real-world, closed-loop, multiple-input, multiple-output (MIMO) communication system that includes transmission and reception processes with beamforming capabilities. It has integrated capabilities for applying and testing different DPD algorithms and implementations tailored for MIMO architectures. The simulation environment enables evaluation of different DPD techniques, signal configurations, and satellite communications (SATCOM) standards in realistic scenarios, providing valuable insights into their potential deployment in satellite systems.

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