Abstract
Future wireless communication systems demand faster communications, massive access, high mobility, relaxed synchronization and also a very low latency. Generalized Frequency Division Multiplexing (GFDM) a candidate for 5G, is a non-orthogonal based multi-carrier technique with a flexible frame structure of M time slots per K subcarriers and a free choice of pulse shaping filter. However, due to the inherent non-orthogonal nature of the subcarriers there is a performance degradation. This paper discusses the preliminary performance evaluation of a GFDM based digital communication system with prolate spheroidal (multi-taper) windows versus conventional GFDM. The introduction of prolate spheroidal windows as pulse shaping filters can compensate for orthogonality loss, eventually turning conventional GFDM into an improved, orthogonal system. GFDM using these windows outperforms conventional GFDM in terms of symbol error rate (SER) performance in fading multipath channels. Furthermore, the analytical equations of the above performance in conventional GFDM are extended to cover the multi-taper case and the analytical results are compared with simulations.
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