5GNOW @The 9th International Workshop on Broadband Wireless Access (BWA) on IEEE Globecom’13 conference
V. Vakilian, T. Wild, F. Schaich, S.t. Brink, J.-F. Frigon, „Universal-Filtered Multi-Carrier Technique for Wireless Systems Beyond LTE“, 9th International Workshop on Broadband Wireless Access (BWA) @ IEEE Globecom’13, Atlanta, GA, USA, December 2013
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. In the proposed scheme, called universal-filtered multicarrier (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 out-of-band sidelobe levels and subsequently minimize the potential ICI between adjacent users in case of asynchronous transmissions. We consider a coordinated multipoint (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. We examine the impact of carrier frequency offset (CFO) on the performance of the proposed scheme and compare the results with the performance of cyclic prefix based orthogonal
frequency division multiplexing (CP-OFDM) systems. We use computer experiments to illustrate the efficiency of the proposed multi-carrier scheme. The results indicate that the UFMC scheme outperforms the OFDM for both perfect and non-perfect frequency synchronization between the UEs and BSs.