The paper considers an active RIS-aided multi-user uplink massive MIMO system with low-resolution ADCs. The key highlights are:
A closed-form approximate expression for the sum achievable rate (AR) is derived, where the maximum ratio combination (MRC) processing and low-resolution ADCs are applied at the base station.
The system performance is analyzed, and a genetic algorithm (GA)-based method is proposed to optimize the RIS's phase shifts for enhancing the system performance.
Numerical results verify the accuracy of the derivations and demonstrate that the active RIS has a notable performance gain over the passive RIS.
Applying low-resolution ADCs in this system can balance the system performance with the deployment costs.
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by Zhangjie Pen... at arxiv.org 04-23-2024
https://arxiv.org/pdf/2404.13875.pdfDeeper Inquiries