A Transceiver Modification for Universal Filtered Multicarrier Scheme in 5G Cellular Network

Abstract

Due to the demand of 5G cellular network, several multicarrier schemes are proposed to support waveform candidates in the next generation communication system. In this paper, several multicarrier schemes are analyzed, including filter bank multicarrier (FBMC) and universal filtered multicarrier(UFMC). In FBMC systems, each subcarrier is shaped by a filter. The bandwidth efficiency of FBMC scheme is higher than that of UFMC scheme. In UFMC systems, several subcarriers are grouped into one resource block. Thus, the length of shaping filter in UFMC systems is much shorter than that in FBMC systems. However, the inter-symbol interference (ISI) is unavoidable in UFMC systems. Therefore, a novel transceiver structure and a filter optimization solution are proposed for UFMC systems in this paper. The scheme is proposed to overcome the problem of ISI and out-of-band emission (OOBE) with lower computational complexity. The proposed UFMC system is compared with both FBMC and conventional UFMC systems. Simulation results demonstrate that the performance of bit error rate (BER) and OOBE of the proposed scheme are better than those of other schemes presented in the existing literature.