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What is the Most Efficient Technique for Uplink Cell-Free Massive MIMO?
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What is the Most Efficient Technique for Uplink Cell-Free Massive MIMO?
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This paper seeks to determine the most efficient uplink technique for cell-free massive MIMO systems. Despite offering great advances, existing works suffer from fragmented methodologies and inconsistent assumptions (e.g., single- vs. multi-antenna access points, ideal vs. spatially correlated channels). To address these limitations, we: (1) establish a unified analytical framework compatible with centralized/distributed processing and diverse combining schemes; (2) develop a universal optimization strategy for max-min power control; and (3) conduct a holistic study among four critical metrics: worst-case user spectral efficiency (fairness), system capacity, fronthaul signaling, and computational complexity. Through analyses and evaluation, this work ultimately identifies the optimal uplink technique for practical cell-free deployments.
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Cited by 1 Pith paper
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Joint Load Balancing and Transmit Power Control for Energy Efficiency Maximization in the Satellite-Cell-Free Massive MIMO Uplink
For a satellite-plus-cell-free massive MIMO uplink, closed-form rates are derived and an evolutionary optimizer jointly assigns users to satellites/access points and sets transmit powers to maximize energy efficiency.
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