This letter aims to clarify the impact of channel aging and phase noise on the performance of intelligent reflecting surface-aided wireless systems. We first model mathematically the outdated channel state information (CSI) due to Doppler shifts and phase noise stemming from hardware impairment. Then, a closed-form expression of achievable spectral efficiency under noisy and aged CSI is theoretically derived. Some typical simulation results to numerically demonstrate the performance impact are illustrated.
@article{arxiv.2209.10360,
title = {Performance Impact of Channel Aging and Phase Noise on Intelligent Reflecting Surface},
author = {Wei Jiang and Hans Dieter Schotten},
journal= {arXiv preprint arXiv:2209.10360},
year = {2022}
}