期刊
IEEE WIRELESS COMMUNICATIONS LETTERS
卷 9, 期 9, 页码 1366-1369出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LWC.2020.2990431
关键词
Radio frequency; Hardware; Array signal processing; Downlink; Phase noise; Signal to noise ratio; MISO communication; Intelligent reflecting surface; hardware impairments; spectral efficiency; energy efficiency
资金
- National Key Research and Development Program [2018YFA0701602]
- Natural Science Foundation of Jiangsu Province for Distinguished Young Scholars [BK20190012]
- NSFC [61871109, 61941115]
- European Commission through the H2020 ARIADNE Project [871464]
In this letter, we analyze the spectral and energy efficiency of an intelligent reflecting surface (IRS)-assisted multiple-input single-output (MISO) downlink system with hardware impairments. An extended error vector magnitude (EEVM) model is utilized to characterize the impact of radio-frequency (RF) impairments at the access point (AP) and phase noise is considered at the IRS. We show that the spectral efficiency is limited due to the hardware impairments even when the numbers of AP antennas and IRS elements grow infinitely large, which is in contrast with the conventional case with ideal hardware. Moreover, the performance degradation at high SNR is shown to be mainly affected by the AP hardware impairments rather than by the phase noise at the IRS. We further obtain in closed form the optimal transmit power for energy efficiency maximization. Simulation results are provided to verify the obtained results.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据