MISO Broadcasting FBMC System for Highly Frequency Selective Channels

In this contribution we propose new techniques for multi-user MISO broadcasting with Filter Bank based Multicarrier (FBMC) systems using offset-QAM (OQAM). FBMC is a prominent alternative to OFDM that can achieve higher bandwidth efficiency since no cyclic prefix is required. However, when extending FBMC to a multi-antenna system, approaches that are used in OFDM cannot be directly applied due to its special structure and the existence of inter-carrier and intersymbol interference. We will consider a downlink scenario for the transmission from a multi-antenna base station to several single-antenna mobile stations. To this end, a Minimum Mean Square Error (MMSE) based multi-tap precoder and equalizer will be designed. Our method is of particular interest for highly frequency selective channels.