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In the last few decades, telecommunication systems have become an essential tool that profoundly changed the perception of the world and how people interact with it. The fifth generation (5G) envisions the support of a new class of demanding services and requires a paradigm shift in current wireless communication technology. As an example, radio access via alternative waveforms other than orthogonal frequency division multiplexing is feasible and has many advantages. In particular, filter bank multicarrier (FBMC) multiplexing is a promising nonorthogonal waveform due to its high-performance spectrum signature, resilience to time-frequency dispersion, and nonreliance on cyclic prefix. From this perspective, we study FBMC as an enabler of 5G by providing an overview of FBMC systems and proposing new prototype filter designs for such a multiplexing scheme. In this paper, we study FBMC as a means of characterizing and improving the feasibility of FBMC for 5G wireless systems. More specifically, we study promising prototype filters, highlight their importance on the spectrum and their symbol reconstruction qualities of FBMC signals, and propose prototype filter designs to enhance the operation of FBMC systems, throughput, bit error ratio, and bit error probability comparisons of different filters of FBMC systems.

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