MIMO Filter-Bank Multicarrier system using unique word ODFM

Abstract—Abstract Orthogonal frequency division multiplexing (OFDM) multicarrier system is one of the most common approaches to overcome the frequency-selectivity of channels. When impulse response of channel is long the spectral efficiency of OFDM becomes very low due to using cyclic prefix (CP). Another multicarrier system, which achieves high spectral efficiency, is based on using filter-bank (FB). However, due to using real symbols in OFDM/OQAM, which is high spectral efficient Fb-based system, it’s not suitable for multi-input multiple output (MIMO) techniques in which complex symbols are employed. In this paper, we proposed a new multicarrier system, in which FB and unique word OFDM (UW-OFDM) techniques are combined together; call FB-UW-OFDM system, the space-time coding scheme can be employed. The proposed system is following the approach which CP-OFDM techniques has been used instead of UW-OFDM.