Impact of Channel Aging on Zero-Forcing Precoding in Cell-Free Massive MIMO Systems
Wei Jiang, Hans D. Schotten
Abstract
In the context of cell-free massive multi-input multi-output (mMIMO), zero-forcing precoding (ZFP) requires the exchange of instantaneous channel state information and precoded data symbols via a fronthaul network. It causes considerable propagation and processing delays, which degrade performance. This letter analyzes the impact of channel aging on the performance of ZFP in cell-free mMIMO. The aging effects of not only user mobility but also phase noise are considered. Numerical results in terms of per-user spectral efficiency are illustrated.
Topics & Concepts
PrecodingComputer scienceMIMOZero-forcing precodingSpectral efficiencyChannel (broadcasting)Context (archaeology)Channel state informationBit error rateElectronic engineeringNoise (video)AlgorithmTelecommunicationsWirelessEngineeringArtificial intelligencePaleontologyBiologyImage (mathematics)Advanced MIMO Systems OptimizationCooperative Communication and Network CodingAdvanced Wireless Network Optimization