Research internship proposal in wirless communications H/F

il y a 2 jours

Grenoble, Auvergne-Rhône-Alpes, France CEA Temps plein


General information

Organisation

The French Alternative Energies and Atomic Energy Commission (CEA) is a key player in research, development and innovation in four main areas :

• defence and security,

• nuclear energy (fission and fusion),

• technological research for industry,

• fundamental research in the physical sciences and life sciences.

Drawing on its widely acknowledged expertise, and thanks to its 16000 technicians, engineers, researchers and staff, the CEA actively participates in collaborative projects with a large number of academic and industrial partners.

The CEA is established in ten centers spread throughout France

Reference

Description de l'unité

Au sein du Leti, le Laboratoire « Signal, Protocoles et Plateformes Radio » (LS2PR) a pour mission l'étude de systèmes sans fil avancés, ainsi que leur implémentation sur des dispositifs électroniques embarqués. Les domaines de recherche du laboratoire couvrent la conception d'algorithmes au niveau de la couche physique radio (définition de formes d'ondes et traitement du signal associé) et de protocoles inter-couches (accès au spectre et réseau), l'optimisation et l'orchestration de ressources pour la communication, le calcul et le contrôle dans les réseaux, la définition d'architectures de connectivité, ou encore la localisation et la détection radio.

Les solutions de communications sans fil ainsi développées permettent de couvrir aussi bien les besoins d'applications spécifiques (tels que les communications fortement contraintes en énergie, en latence et/ou en débits disponibles…), que ceux des futures générations de réseaux cellulaires (typiquement, 5G+ et 6G).


Category

Engineering science


Contract

Internship


Job title

Research internship proposal in wirless communications H/F


Subject

Synchronization for distributed massive MIMO based 6G networks


Contract duration (months)

6


Job description

MIMO transmission based communication systems require accurate synchronization in the low sub-nanosecond range, which surpassed the capabilities of current off-the-shelf system. In the traditional/co-localized antenna array, it is straightforward to make phase-coherent transmissions over the different antenna elements. Nevertheless, in a distributed MIMO system such as a cell-free massive MIMO system, timing errors between transmissions from different access points (APs) affect the phase-coherency and thereby the system performance.   

We assume inexpensive APs connected the central unit (CU) via a traditional wired fronthaul/backhaul capable of transmitting accurately data at sufficient speed from/to CU, but not able to distribute a common clock (i.e., timing information) to the APs due to the physical distance between them.  Since each AP is driven by its own individual clock, differences between local times in the different APs give rise to the timing errors. 

The main goal of this internship is to study synchronization procedures that can realize accurate phase-coherent transmissions in a distributed massive MIMO system. Solutions should be scalable to enable large-scale MIMO in a distributed system. 

The internship will be conducted as follows:

Study the impact of timing errors on the performance of cell-free massive MIMO systems

Study a scalable synchronization scheme that can be implemented in a distributed manner.

Implementation of the developed method with a cell-free massive MIMO system 


Methods / Means

Python, MATLAB


Applicant Profile

The candidate should have diverse skills including signal processing dedicated to digital communications, optimization and machine learning.


Site

Grenoble


Job location

France, Auvergne-Rhône-Alpes, Isère (38)


Location


Grenoble

Candidate criteria
Languages
  • English (Fluent)
  • French (Fluent)

Prepared diploma

Bac+5 - Diplôme École d'ingénieurs


Recommended training

Télécommunications


Position start date

01/02/2024

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