Towards the Assessment of Realistic Hybrid Precoding in Millimeter Wave MIMO Systems with Hardware Impairments

Abstract

© 2021 The Authors. IET Communications published by John Wiley & Sons Ltd on behalf of The Institution of Engineering and Technology. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. https://creativecommons.org/licenses/by/4.0/Hybrid processing in millimeter wave (mmWave)communication has been proposed as a solution to reduce the cost and energy consumption by reducing the number of radiofrequency (RF) chains. However, the impact of the inevitable residual transceiver hardware impairments (RTHIs), including the residual additive transceiver hardware impairments (RATHIs)and the amplified thermal noise (ATN), has not been sufficiently studied in mmWave hybrid processing. In this work, we design the hybrid precoder and combiner, which include both digital and analog processing by taking into account the RATHIs and the ATN .In particular, we provide a thorough study to shed light on the degradation of the spectral efficiency (SE) of the practical system. The outcomes show the steady degradation of the performance by the ATN across all SNR values, which becomes increasing lycritical for higher values of its variance. Furthermore, we show that RATHIs result in degradation of the system only in the high SNR regime. Hence, their impact in mmWave system operating at low SNRs might be negligible. Moreover, an increase concerningPeer reviewe