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What is the Most Efficient Technique for Uplink Cell-Free Massive MIMO?
Wei Jiang, Hans D. Schotten
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 methodo…
Achieving Optimal Performance-Cost Trade-Off in Hierarchical Cell-Free Massive MIMO
Wei Jiang, Hans D Schotten
Cell-free (CF) massive MIMO offers uniform service via distributed access points (APs), which impose high deployment costs. A novel design called hierarchical cell-free (HCF) addre…
Heterogeneous Massive MIMO: A Cost-Efficient Technique for Uniform Service in Cellular Networks
Wei Jiang, Hans D. Schotten
Massive multi-input multi-output (MIMO) has evolved along two tracks: cellular and cell-free, each with unique advantages and limitations. The cellular approach suffers from worse…
Nonlinear Power Amplifier-Resilient Cell-Free Massive MIMO: A Joint Optimization Approach
Wei Jiang, Hans D. Schotten
This letter analyzes the effects of power amplifiers (PAs) on the downlink of cell-free massive MIMO systems. We model signal transmission incorporating nonlinear PA distortion and…
Hierarchical Cell-Free Massive MIMO: A Simplified Design for Uniform Service Quality
Wei Jiang, Hans Dieter Schotten
In traditional cellular networks, users at the cell edge often suffer from poor quality of service (QoS) due to large distance-dependent path loss and severe inter-cell interferenc…
A Frequency-Domain Opportunistic Approach for Spectral-Efficient Cell-Free Massive MIMO
Wei Jiang, Hans Dieter Schotten
Constrained by weak signal strength and significant inter-cell interference, users located at the cell edge in a cellular network suffer from inferior service quality. Recently, ce…