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Performance Impact of Channel Aging and Phase Noise on Intelligent Reflecting Surface

Wei Jiang; Hans Dieter Schotten
In: IEEE Communications Letters, Pages 1-5, IEEE, 3/2023.


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 We first model mathematically the outdated channel state information (CSI) due to Doppler shifts and phase noise stemming from hardware impairment.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.