PhD position (CentraleSupélec, IETR) : Physical layer of sub-tera Hertz communications
LABORATORY: IETR (CNRS lab.)
RESEARCH TEAM: SCEE – CentraleSupélec (Rennes)
TOPICS: Digital Communications and communication systems
DATES: Sept. 2020 to Sept. 2023
Context of the study
Wireless data traffic increases by a factor of 100 every 10 years and data rates of even Tb/s will be requested by 2025. Since Shannon’s limit is proportional to the total bandwidth (BW), a more efficient use of available spectrum will not suffice to reach the predicted data rates. The use of carriers in the sub-Terahertz (sub-THz) or submillimeter (sub-mm) wave regime (between 100 GHz and 1 THz) will be pivotal to achieve the total bandwidths required for applications like enhanced mobile broadband (eMBB), which will absorb more than 95% of the future 5G market or ultra-reliable low latency communications. Among these applications, front- and back-hauling in beyond 5G systems, streaming of ultra-high definition multimedia and data centers are expected to push the technological developments in the sub-THz regime.
In this context, the challenge associated to this PhD consists in providing adequate waveforms for single carrier (SC) sub-THz modulations using realistic data for the front-end. Despite the well-known drawbacks of multi-carrier (MC) modulations (e.g., inter-symbol interferences and high peak-to-average ratio, PAPR), they are still widely used in many recent wireless systems: 4G, 5G, Wi-Fi, and video broadcasting, to name a few. Nevertheless, subTHz transmissions call for SC schemes, which are much more energy-efficient at the expense of lower spectral efficiencies. Then, the challenge is to keep increasing the spectral efficiency while targeting the key requirements: long transmission ranges, high data rates and low power consumption. This challenge must be addressed while using realistic front-end data (antenna gain, carrier stability, phase noise, etc.) to help defining the waveform.
This PhD position is open at IETR (Institut d’Electronique et de Télécommunications de Rennes), a CNRS research lab mostly located in Rennes (France). The works will be done in SCEE group (Signal Communications and Embedded Electronics) of IETR, at CentraleSupélec (Rennes). This work will be integrated in a 3 years-collaborative project with other research laboratories from Brittany.
Topics: Digital communications, sub-tera Hertz transmissions, signal processing
Contact: Yves LOUËT, CentraleSupélec, Rennes Campus
IETR / SCEE
(c) GdR 720 ISIS - CNRS - 2011-2020.