Waveform innovation for 6G: addressing synchronization, efficiency and integration challenges with filtered multi-carrier modulations
2 May 2024
Job Information
- Organisation/Company
IMT Atlantique- Department
Doctoral division- Research Field
Engineering » Electronic engineering
Engineering » Other- Researcher Profile
First Stage Researcher (R1)- Country
France- Application Deadline
15 May 2024 - 23:00 (Europe/Paris)- Type of Contract
Temporary- Job Status
Full-time- Offer Starting Date
1 Oct 2024- Is the job funded through the EU Research Framework Programme?
Not funded by an EU programme- Is the Job related to staff position within a Research Infrastructure?
No
Offer Description
Context
The upcoming 6G wireless communication standard aims to offer universal connectivity and consistent service across varied conditions, supporting an extensive number of devices and both human-centric and machine-type applications. This diversity leads to stringent system design requirements, focusing not only on higher data throughput and nearly perfect reliability but also on ultra-low latency that should not exceed 0.01ms for certain applications. Additionally, efficient resource utilization, including energy and spectrum, is increasingly vital.
Efficiently addressing these challenges goes through exploring disruptive technologies at the physical layer. While effective in previous generations for its robustness and ease of implementation, the current 5G OFDM waveform struggles with significant out-of-band power leakage and requires precise multi-user synchronization, which wastes bandwidth, increases latency and power consumption. Alternative filtered waveforms offer better spectrum usage and resilience to synchronization errors, making them particularly suited for dense network deployments and high mobility environments.
Our research team has recently proposed a ISAC capable new waveform and patented several innovative contributions around filtered waveforms over the past few years, including a hardware demonstration platform for 5G scenarios. The recent results and the emerging new challenges in 6G have triggered the need for prototyping new ideas to address some remaining issues we aim to explore in this PhD topic. This will enable us to collaborate with key industrial players to leverage the potential of adopting filtered multicarrier waveforms in 6G.
Thesis objectives
Our research team has introduced a new transmission method called Modulation Code Overlapping (MCO) to enhance by 20% the spectral efficiency (SE) of multicarrier systems through overlapping subcarriers of adjacent users without penalizing the robustness to impairments. Initially designed for SISO transmissions, MCO is now being adapted for massive MIMO (mMIMO) systems due to increasing mobile data traffic and the need for higher spectral efficiency in cellular networks. In mMIMO, channel orthogonality limits the number of users per subband, creating a trade-off between system performance and spectral efficiency. MCO can address this by overlapping subcarriers of adjacent subbands, with each subband accommodating different users. Essentially, the concept is to carefully manage the allocation of subcarriers and users across multiple subbands, leveraging the advantages of mMIMO while considering the limitations imposed by channel orthogonality and system performance. By exploring the potential of the MCO scheme in the context of mMIMO, we aim to strike a balance between achieving high SE and ensuring satisfactory overall system performance.
The second main objective of this thesis concerns the investigation of algorithm simplification and complexity reduction techniques for the recently proposed contributions in our research team on waveform design at transmitter and receiver side. Efficient and optimized application-aware hardware/software architectures should be proposed and integrated into a demonstration platform as a proof-of-concept. For the demonstration platform, several options could be considered such as extending our available FPGA-based platform for wireless communications or adopting existing similar platforms from our academic and industrial partners within the PEPR Networks of the Future.
Thesis offer : https://www.imt-atlantique.fr/sites/default/files/recherche/Offres%20de%20th%C3%A8ses/2024/booklet-merged.pdf
Requirements
- Research Field
- Engineering » Electronic engineering
- Education Level
- Master Degree or equivalent
Skills/Qualifications
The candidate must have a Master's degree or equivalent (engineer Bac+5) in telecommunications or electronics. Expected skills include:
- Solid skills in digital communications, in particular OFDM and channel coding.
- Mastery of simulation tools (MATLAB/Simulink) and programming (Python/C++).
- Practical experience with embedded systems, processor architectures and FPGAs.
- Ability to collaborate in a multidisciplinary environment.
- Communication and scientific writing skills in English.
- Ability to work in autonomy, develop innovative solutions and integrate them into practical applications.
- Languages
- ENGLISH
- Level
- Good
Internal Application form(s) needed
2024_Waveform innovation for 6G addressing synchronization, efficiency and integration challenges with filtered multi-carrier modulatio.pdf
English
(142.21 KB - PDF)
Download
Additional Information
Work Location(s)
- Number of offers available
- 1
- Company/Institute
- IMT Atlantique Bretagne - Pays de la Loire
- Country
- France
- City
- Brest
- Geofield
Where to apply
[email protected]
Contact
- City
Brest- Website
https://www.imt-atlantique.fr/en
STATUS: EXPIRED