Suboptimal Frequency-Selective Transceiver Design for Multicarrier Millimeter Wave MIMO Systems

Year 2018, Volume: 18 Issue: 1, 83 - 89, 23.02.2018

Nihat Kabaoğlu

Abstract

Fifth-generation (5G)
cellular communication systems aim to obtain a higher data rate, decreased
latency time, higher performance even at high mobility speeds, decreased system
complexity, lower transmission cost, and an increased system capacity and
coverage area. Many of these goals can be achieved because of the studies
devoted to the physical layer of 5G cellular networks. In this respect,
solutions to the problems of beamforming (steering and precoding or precoding
and combining) and channel estimation that are encountered in the physical layer
of 5G cellular networks are the key points to achieve the aforementioned goals.
Thus, a two-stage beamforming method is proposed in this study. The proposed
method is a suboptimal method that minimizes the difference between outputs
obtained when fully digital and hybrid beamforming methods are used. The
analytical results, which are validated through simulations, demonstrate that
the proposed method is an effective solution and, hence, the preferred
beamforming approach for 5G millimeter wave band-based wireless systems. 

Keywords

Millimeter wave communications, hybrid beamforming, precoding and combining

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