Spatial Diversity Scheme to Efficiently Cancel ISI and ICI in OFDM-OQAM Systems

This paper is based on an Offset Quadrature Amplitude Modulation (OQAM) Orthogonal Frequency Division Multiplexing (OFDM) transmission scheme that is operated without a Cyclic Prefix (CP), where the multiple transmitting antennas are employed to substantially reduce the inherent inter-symbol and inter-carrier interference. The proposed scheme avoids the use of the CDMA technology to get rid of the interference. The non-employment of the CP increases the spectral efficiency in comparison with classical CP-OFDM systems, as it does not employ the CP for its correct performance. On the other hand, the non-employment of the CP comes at cost of Inter-Symbol Interference (ISI).