Allocation dynamique des sous porteuses multi-utilisateurs dans un système 4G

Abstract

The digital transmission by multi-carriers is an effective solution in the mobile networks. Among the modern techniques of numerical modulation multi-carriers, we can quote OFDM, COFDM, MC-CDMA and OFDMA. Technique OFDMA authorizes several users occupied the same system at the same time (multi-users). In this subject of magister, we propose to develop an algorithm which treats dynamic allocation of the subcarriers multi-users in an OFDMA-4G system. This algorithm must allow the improvement of the performances of the system referred to above all while maintaining a profit identical for all the users.