24-280 Multi-aperture Adaptive Optics for
Il y a 2 mois
Doctorat, 36 mois
- Temps plein
- Aucune expérience exigée
- Maitrise, IEP, IUP, Bac+4
- Telecommunications
**Mission**:
Two competing optical strategies, to be deployed on the groundside, are currently studied for turbulence mitigation: Adaptive Optics (AO), and multi-aperture diversity. Focusing on the uplink, AO pre-compensation on a single large aperture is limited in performance due to point-ahead anisoplanatism. Hence the multi-aperture diversity alternative that consists in averaging out turbulence effects via multiple emitters on small apertures and at different wavelengths with the drawback of a reduced spectral efficiency. We believe however that recent developments in these two fields are about to change the overall system optimisation. Indeed, P. Lognoné, our current CNES/ONERA/TelecomParis PhD student, has found a very innovative approach that significantly reduces AO point-ahead anisoplanatism, while, in the meantime, new techniques using polarisation, phase and spectral division are progressively improving the spectral efficiency of multi-aperture diversity.
Research project:
The PhD work is triggered by these recent developments and aims at a joint optimization of optical and digital communication strategies so as to take advantage of the overall channel diversity by exploiting all the degrees of freedom of the channel: spatial, spectral and polarization domain. We aim to investigate in particular hybrid solutions consisting of multiple AO corrected medium size apertures together with smart telecom modalities (modulation format, channel coding, interleaving, MIMO (Multi-Input Munti-Output) coding/decoding...). Reaching this objective implies addressing various research topics:
- study and optimization of the uplink channel with AO assisted multi-aperture configurations in the presence of point ahead anisoplanatism: impact of aperture number and diameter, means to obtain incoherent beam summation while keeping good spectral efficiency,
- study of the diversity of the uplink channel with AO assisted multi-aperture configuration, theoretical assessment of performance limits (channel capacity),
- optimization of the digital signal processing (DSP) modules as modulation format, channel coding/decoding and MISO (Multi-Input Single-Output) schemes.
In summary, the PhD work will provide innovative concepts allowing unprecedented high performance and high data rate optical links from ground to LEO/GEO satellites. Novelty is based on the co-design of optical and digital communication strategies exploiting channel diversity and all physical degrees of freedom of the channel at hand. This work should have a strong impact on the design of future operational systems.
Environment:
The PhD student will benefit of the heritage of former CNES/ONERA PhD works (L. Canuet, P. Lognoné, P. Robles). He will have access to ONERA simulation tools and to unique experimental results coming from: FEEDELIO, the first experimental demonstration of uplink pre-compensation on a slant line of sight relevant of the ground-GEO scenario; and complemented recently by the VERTIGO high data rate optical link terrain demonstration (July 2022; EC H2020 funded project). The PhD student will therefore also benefit from this international collaboration environment.
In the continuity of P. Lognoné’s PhD, this work will be performed under the supervision of, and in close collaboration with, Ghaya Rekaya (Professor at Telecom Paris) who is expert in digital communication and more particularly in MIMO systems. She has also several contributions on DSP for Space-Division Multiplexing Optical fiber communications, and is CEO of MIMOPT, a recently created startup working in this field.
=================
**Profil**:
Master 2 or Engineering schools with majors in Physics, Optics, Telecom, Physics or Signal Processing. Skills : Optics, digital communications, modeling tools
**Laboratoire**:
ONERA
**Message from PhD team**:
-
Construction Manager
Il y a 2 mois
Paris, France Soli Infratechnik GmbH Temps plein**Construction Manager - fiber optic technology** We network the future! As a partner of the German network operators, Soli Infratechnik GmbH plans and expands the digital fiber optic infrastructure. Become a part of us and contribute effectively to a modern future and the broadband expansion. We are looking for a **Construction Manager (M/F/d) for fiber...
-
Member of Technical Staff
il y a 3 jours
Paris, France Adaptive ML Temps plein**About the team**: **Adaptive is helping companies build singular generative AI experiences by democratizing the use of reinforcement learning**. We are building the foundational technologies, tools, and products required for models to learn directly from users' interactions and for models to self-critique and self-improve from simple written guidelines....
-
Gpu Performance Engineer
il y a 3 jours
Paris, France Adaptive ML Temps plein**About the team**: **Adaptive is helping companies build singular generative AI experiences by democratizing the use of reinforcement learning**. We are building the foundational technologies, tools, and products required for models to learn directly from users' interactions and for models to self-critique and self-improve from simple written guidelines....
-
Optic Cable Project Engineering
Il y a 2 mois
Paris, France MPH Global Services Temps pleinIndustry: Oil & Gas City/Country: Paris, France Location: Paris, Île-de-France We are currently looking for "Optic Cable Project Engineering/ Field Development Engineering" for an Oil and Gas Company in Paris, France. Term and Conditions: Duration: 12 Months Development studies / Field architecture assistance: - Contribution to Project high-level...
-
Regional Sales Engineer Optics for Computer Vision
Il y a 2 mois
Paris, France Vision Markets - Your global growth in Machine Vision Temps pleinOur client is a recognized global leader of the vision industry with 3+ bn$ in revenue. For decades, its optics and opto-electrical products have been used in a wide range of applications from automotive manufacturing to logistics, pharmaceuticals, and food. Here they play a key role in the automation of production processes and optical quality inspection...
-
Regional Sales Engineer Optics for Computer Vision
Il y a 2 mois
Paris, France Vision Markets - Your global growth in Machine Vision Temps pleinOur client is a recognized global leader of the vision industry with 3+ bn$ in revenue. For decades, its optics and opto-electrical products have been used in a wide range of applications from automotive manufacturing to logistics, pharmaceuticals, and food. Here they play a key role in the automation of production processes and optical quality inspection...
-
Regional Sales Engineer Optics for Computer Vision
il y a 2 semaines
Paris, France Vision Markets - Your global growth in Machine Vision Temps pleinOur client is a recognized global leader of the vision industry with 3+ bn$ in revenue. For decades, its optics and opto-electrical products have been used in a wide range of applications from automotive manufacturing to logistics, pharmaceuticals, and food. Here they play a key role in the automation of production processes and optical quality inspection...
-
Regional Sales Engineer Optics for Computer Vision
il y a 2 semaines
Paris, France Vision Markets - Your global growth in Machine Vision Temps pleinOur client is a recognized global leader of the vision industry with 3+ bn$ in revenue. For decades, its optics and opto-electrical products have been used in a wide range of applications from automotive manufacturing to logistics, pharmaceuticals, and food. Here they play a key role in the automation of production processes and optical quality inspection...
-
Engineer, Member of Product Staff
il y a 4 semaines
Paris, France Adaptive ML Temps pleinAbout Adaptive ML Adaptive is helping companies build singular generative AI experiences by democratizing the use of reinforcement learning. We are building the foundational technologies, tools, and products required for models to learn directly from users' interactions and for models to self-critique and self-improve from simple written...
-
Engineer, Member of Product Staff
il y a 4 semaines
Paris, Île-de-France Adaptive ML Temps pleinAbout Adaptive ML Adaptive is helping companies build singular generative AI experiences by democratizing the use of reinforcement learning. We are building the foundational technologies, tools, and products required for models to learn directly from users' interactions and for models to self-critique and self-improve from simple written guidelines. Our...
-
Engineer, Member of Product Staff
il y a 2 semaines
Paris, Île-de-France Adaptive ML Temps pleinAbout Adaptive ML Adaptive is helping companies build singular generative AI experiences by democratizing the use of reinforcement learning. We are building the foundational technologies, tools, and products required for models to learn directly from users' interactions and for models to self-critique and self-improve from simple written guidelines. Our...
-
Engineer, Member of Product Staff
il y a 3 jours
Paris, France Adaptive ML Temps plein**About the team**: **Adaptive is helping companies build singular generative AI experiences by democratizing the use of reinforcement learning**. We are building the foundational technologies, tools, and products required for models to learn directly from users' interactions and for models to self-critique and self-improve from simple written guidelines....
-
24-267 Interferometric Imaging Based On Photonic
Il y a 2 mois
Paris, France CNES - Centre National d'Etudes Spatiales Temps pleinDoctorat, 36 mois - Temps plein - Aucune expérience exigée - Maitrise, IEP, IUP, Bac+4 - Instrumentation **Mission**: A concept for an optical interferometric imager was proposed by Lockheed-Martin in the early 2010s. In this concept, the aperture is paved with lenses. The optical signals collected by these lenses are combined in photonic integrated...
-
24-253 Multi-pixel Thz Heterodyne Receiver for
Il y a 2 mois
Paris, France CNES - Centre National d'Etudes Spatiales Temps pleinDoctorat, 36 mois - Temps plein - Aucune expérience exigée - Maitrise, IEP, IUP, Bac+4 - Astronomy, Astrophysics **Mission**: For the development of future telescopes as well as for all heterodyne instruments, high-resolution spectroscopic imaging in the THz domain is an important issue that gathers increasing interest in many scientific fields. This can...
-
HR Business Analyst Intern
il y a 1 mois
Paris, France Pernod Ricard Temps pleinWant to join a fast-moving company and work among convivial teams? Pernod Ricard is looking for its next Human Resources Business Analyst starting in July 2023. You will be based at The Island, our office in central Paris. - Workday has been chosen as the main solution to power the HR strategy all around the world, putting the employee at the center. It has...
-
Paris, France SEQUANS Temps pleinPARIS – FRANCE We are offering a 6-month internship within the Software team for final-year students : Assembling Multi-OS systems using standards-based protocols for intra-SoC for 5G chipset. In order to increase the flexibility of our solution, we would like to study and develop a new partitioned system in SOC which will include a zephyr virtio...
-
Photonics Engineer
Il y a 2 mois
Paris, France Woodoo Temps pleinw**w**o**o**d**od**o**oo**.c**.c**o**om** LAST YEAR INTERNSHIP / PARIS, FRANCE **PHOTONICS ENGINEER** M/F*** ❶ OUR MISSION*** **We believe in a future where nature and technology could blend, to address the next technological challenges.** Woodoo is specialized in groundbreaking biomaterials based on the structural transformation of wood at the...
-
Photonics Engineer
il y a 5 jours
Paris, France Woodoo Temps pleinw**w**o**o**d**od**o**oo**.c**.c**o**om** INTERNSHIP / PARIS, FRANCE **PHOTONICS ENGINEER** M/F*** ❶ OUR MISSION*** **We believe in a future where nature and technology could blend, to address the next technological challenges.** Woodoo is specialized in groundbreaking biomaterials based on the structural transformation of wood at the...
-
24-194 Aerosol & Ghg Simultaneous Measurement to
Il y a 2 mois
Paris, France CNES - Centre National d'Etudes Spatiales Temps pleinDoctorat, 36 mois - Temps plein - Aucune expérience exigée - Maitrise, IEP, IUP, Bac+4 - Atmospheric Composition & Climate **Mission**: The increase in greenhouse gases (GHG) and aerosols in the atmosphere and their impact on climate change are among the most important environmental problems. Since the Paris agreements, monitoring them has been a...
-
EPM / CPM Account Executive, Large Enterprise, France
il y a 4 semaines
Paris, France Workday France Temps pleinAbout the Role Here at Workday, our Adaptive Planning Account Executives are key players in our Field Sales organization. With a net new revenue focus, they are the fuel for Workday’s new customer growth. This fantastic team of hardworking professionals play a key role in guiding new customers on a journey that can see them leave the limitations of...