Universal-Filtered Multi-carrier Technique for Wireless Systems Beyond LTE

In this paper, we propose a multi-carrier transmission scheme to overcome the problem of intercarrier interference (ICI) in orthogonal frequency division multiplexing (OFDM) systems.We consider a coordinated multi-point (CoMP) reception technique, where a number of base stations (BSs) send the received signals from user equipments (UEs) to a CoMP central unit (CCU) for joint detection and processing. In the proposed scheme, called universal-filtered multi-carrier (UFMC), a filtering operation is applied to a group of consecutive subcarriers (e.g. a given allocation of a single user) in order to reduce potential ICI between adjacent users in case of asynchronous transmissions. We investigate the impact of carrier frequency offset (CFO) on the performance of the proposed system and compare the results with the performance of cyclic prefix based orthogonal frequency division multiplexing (CP-OFDM) systems. Computer experiments illustrate the efficiency of the proposed multi-carrier scheme.