Contribution to the optimization of the physical layer of 5G mobile systems by improving the performance of FBMC-OQAM modulation

Telecommunication engineering

User expectations are becoming more pressing in terms of transmission rate and acceptable latency. The deployment of the 5G will provide a reliable network with consistent performance and heterogeneous service qualities according to the needs of users regardless of their position relative to the base station. In the real world, the performance of the transmission system depends on the characteristics of the propagation channel (flat channel or selective channel) and the profile of the users who are classified according to their mobility speed. Depending on the needs of the users, the designers must take into account several factors such as the speed of data transfer (latency), the ability to receive reliable information (low bit error rate) despite the extreme transmission conditions (speed up to 500 km / h). Multicarrier modulations are able to accommodate multiple paths limiting the performance of digital transmissions. The success of OFDM modulation lies in its ability to resist selective channel fading and intersymbol interference. However, some of the characteristics of OFDM systems, such as poor frequency localization and extremely high PAPR, limit their operation by 5G systems that aim to meet users' requirements in terms of data rates, spectral efficiency, energy efficiency and latency. . Thus, it is essential to find an alternative modulation scheme that will be able to support several scenarios related to the technical specifications of 5G.

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.