Description
Date depot: 1 janvier 1900
Titre: Performance analysis and PAPR reduction techniques for Filter Bank based Multi-Carrier systems (FBMC) with Non Linear Power Amplifiers
Directeur de thèse:
Daniel ROVIRAS (CEDRIC)
Domaine scientifique: Sciences et technologies de l'information et de la communication
Thématique CNRS : Non defini
Resumé:
This thesis is part of the European FP7 project EMPHATIC (Enhanced Multicarrier Techniques for Professional Ad-Hoc and Cell-Based Communications, http://www.ict-emphatic.eu/) including various European universities and two main industrial partners: THALES Communications Security and CASSIDIAN. The EMPHATIC objective is to develop, evaluate and demonstrate the capability of enhanced multicarrier techniques to make better use of the existing radio frequency bands in providing broadband data services in coexistence with narrowband legacy services. The project will address the Professional Mobile Radio (PMR) application.
This project is a follower of another European project PHYDYAS (http://www.ict-phydyas.org/) leaded by CNAM where a new physical layer more adapted for dynamic spectrum access and cognitive radio (CR) was studied. A Filter Bank-based Multi-Carrier (FBMC) modulation shows the potential to fulfil the requirements of the new concepts. It offers high spectrum resolution and can provide independent sub-channels, while maintaining or enhancing the high data rate capability.
One great advantage of FBMC modulations is their good performance in a non-synchronized system. For Ad Hoc or CR systems this property is of great interest. This good performance in non-synchronized Rx/Tx is related to the frequency response of the pulse shaping filter of FBMC. Even with a total de-synchronization, a given subcarrier interfere only the two direct adjacent ones while OFDM interfere a large amount of adjacent subcarriers. As long as the Power Amplifier (PA) is linear this property holds. When the PA is Non-Linear (NL) there will be a spectrum broadening and the advantage of FBMC compared to CP-OFDM has to be investigated because an FBMC subcarrier will interfere with more than the two direct adjacent subcarriers depending on the PAPR.
Doctorant.e: Bulusu Sri Satish Krishna Chaitanya