2021-04075 - Post-Doctoral Research Visit F/M Viability of Simultaneous Information and Energy Transmission in Wireless Communications

Level of qualifications required : PhD or equivalent

Fonction : Post-Doctoral Research Visit

About the research centre or Inria department

The Inria Sophia Antipolis - Méditerranée center counts 34 research teams as well as 8 support departments. The center's staff (about 500 people including 320 Inria employees) is made up of scientists of different nationalities (250 foreigners of 50 nationalities), engineers, technicians and administrative staff. 1/3 of the staff are civil servants, the others are contractual agents. The majority of the center’s research teams are located in Sophia Antipolis and Nice in the Alpes-Maritimes. Four teams are based in Montpellier and two teams are hosted in Bologna in Italy and Athens. The Center is a founding member of Université Côte d'Azur and partner of the I-site MUSE supported by the University of Montpellier.

Context

This postdoctoral position is  hosted at INRIA, Sophia Antipolis, in the framework of the study of the viability of simultaneous information and energy transmission in future developments of 5G and 6G telecommunications systems. It develops within a close collaboration between Inria and the main actors of the telecommunications scene in France.

 

Assignment

Radio frequency signals can be used to simultaneously transmit both information and energy, as proved by Nikola Tesla through numerous experiments. Nonetheless, a century later, the exploitation of these phenomena has not yet seen masive comercial use. With the deployment of 5G communications systems and the development of their next generation, simultaneous information and energy transmisson (SIET) has gained attention as a feature that might be embraced by the telecommunications industry and thus, be implemented in a near future. This postdoc aims to contribute in this direction and provide scientific support to the decision faced by telecommunications operators and manufacturers on how to efficiently implement SIET.

The postdoc is expected to extend existing results on the fundamental limits of SIET in canonical channels under tractable mathematical constraints [1-4] to more realistic scenarios considering finite constellations, and imparments tipical of cellular communications. The objective is to provide solid arguments to telecommunications operators and manufacturers on the viability of the implementation of SIET and generate recommendations for the next generation of cellular sytems. 

[1] Selma Belhadj Amor, Samir M. Perlaza, Ioannis Krikidis and H. Vincent Poor. ‘‘Feedback Enhances Simultaneous Information and Energy Transmission in Multiple Access Channels’’, IEEE Transactions on Information Theory, vol. 63, no. 8, pp. 5244–5265, Aug 2017.

[2] N. Khalfet and S.M.Perlaza, “Simultaneous information and energy transmission in the two-user Gaussian interference channel,” IEEE Journal on Selected Areas in Communications, vol. 37, no. 1, pp. 156 –170, Jan. 2019.

[3] Sadaf ul Zuhra, Samir M. Perlaza, and Eitan Altman, ‘‘Simultaneous Information and Energy Transmission with Finite Constellations’’, in Proc. of the IEEE Information Theory Workshop (ITW), Kanazawa, Japan, Oct., 2021.

[4] Nizar Khalfet, Ali Tajer, and H. Vincent Poor. ‘‘On Ultra-Reliable and Low Latency Simultaneous Information and Energy Transmission Systems’’, Research Report, INRIA, No. RR-9261, Lyon, France, May., 2019.

Main activities

The analsys of simultaneous information and energy transmission (SIET) in the context of multiple information transmitters is a difficult problem. The difficulty is in part due to the fact that transmitters must coordinate their transmission scheme and cooperate to achieve the dual goal of SIET. Often, such coordination is not possible due to the lack of signalling among all the interacting devices.  This analysis calls for the use of mathematical tools from information theory, communication theory, and game theory.

The scenario of interest is that in which a large number of information transmitters, e.g., base stations and mobile devices, are concentrated within a given area, e.g., sport facilities. Within this context, the objective is to study the viability of SIET as an alternative energy source for low-energy consumption devices such as sensors, drones, or information displays for which batteries or alternative energy sources are not physically feasible. The expected results are sufficient conditions for jointly achieving targetted values of information transmission rate, energy transmission rates, decoding error probabilities and energy outage probabilities as a function of the number of transmitting devices, average transmit power and parameters of the channel models. 

Skills

Candidates are expected to have a PhD degree in mathematics, electrical engineering, telecommunications or areas related to communication theory, information theory or game theory. Previous knowledge on information theory, and game theory is desirable. The candidate must have a provable level of written and spoken english. Skills in french language are not required.

 

 

Benefits package

  • Subsidized meals
  • Partial reimbursement of public transport costs
  • Leave: 7 weeks of annual leave + 10 extra days off due to RTT (statutory reduction in working hours) + possibility of exceptional leave (sick children, moving home, etc.)
  • Possibility of teleworking (after 6 months of employment) and flexible organization of working hours
  • Professional equipment available (videoconferencing, loan of computer equipment, etc.)
  • Social, cultural and sports events and activities
  • Access to vocational training
  • Social security coverage

Remuneration

Gross Salary: 2653 € per month