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Iterative Interference Cancellation for Clustered Cell-Free Massive MIMO Networks

IEEE Wireless Communications Letters
In this letter, we propose an iterative soft interference cancellation scheme for intra-cluster (ICL) and out-of-cluster (OCL) interference mitigation in user-centric clustered cell-free massive multiple-antenna networks. We propose a minimum mean-square
T. Ssettumba   +4 more
semanticscholar   +1 more source

Robust Resource Allocation in Cell-Free Massive MIMO Systems

IEEE Transactions on Communications
Cell-free networks outperform cellular networks in many aspects, yet their efficiency is affected by imperfect channel state information (CSI). In order to address this issue, this work presents a robust resource allocation framework designed for the ...
S. Mashdour   +5 more
semanticscholar   +1 more source

Performance Analysis of Cell-Free Massive MIMO System With Limited Fronthaul Capacity and Hardware Impairments

IEEE Transactions on Wireless Communications, 2020
We study uplink of cell-free massive multiple-input multiple-output system with limited capacity fronthaul link connecting each access point (AP) to a central processing unit (CPU), under hardware impairments at user equipments and APs.
H. Masoumi, M. Emadi
semanticscholar   +1 more source

Performance Analysis of Cell-Free Massive MIMO-URLLC Systems Over Correlated Rician Fading Channels With Phase Shifts

IEEE Transactions on Wireless Communications
In the realm of industrial Internet of Things, the imperative for ultra-reliable and low-latency communication (URLLC) is underscored by the demand for up to 99.999% reliability and sub-microsecond latency.
Yao Zhang   +5 more
semanticscholar   +1 more source

NOMA-Aided Cell-Free Massive MIMO Systems

IEEE Wireless Communications Letters, 2018
A cell-free massive multiple-input multiple-output system with non-orthogonal multiple-access (NOMA) is investigated. An achievable sum rate is derived and compared against the orthogonal multiple access (OMA) counterpart. Thereby, the detrimental effects of intra-cluster pilot contamination, inter-cluster interference and imperfect successive ...
Yikai Li 0002   +1 more
openaire   +2 more sources

Physical Layer Security in Cell- Free Massive MIMO

2018 IEEE Global Communications Conference (GLOBECOM), 2018
The achievable secrecy rates for a cell-free massive multiple-input multiple-output (MIMO) in the presence of a single-antenna active eavesdropper are derived and compared with that of co-located massive MIMO. The active eavesdropper contaminates the uplink channel estimates at the access points (APs), and the downlink precoders at the APs are ...
Santosh Timilsina   +2 more
openaire   +2 more sources

Internet of Things Based on Cell-Free Massive MIMO

2019 53rd Asilomar Conference on Signals, Systems, and Computers, 2019
We consider Internet of Things (IoT) organized on the principles of Cell-Free Massive MIMO. Since the number of things is very large, orthogonal pilots cannot be assigned to all of them even if the things are stationary. This results in an unavoidable pilot contamination problem, which is severe for IoT since the things are operating at very low ...
Shilpa Rao 0002   +2 more
openaire   +1 more source

Statistical Delay Performance Analysis for URLLC in Uplink Cell-Free Massive MIMO Systems: A Stochastic Network Calculus Perspective

IEEE Transactions on Wireless Communications
Cell-free (CF) massive multiple-input multiple-output (mMIMO), which has been considered as a promising technology to achieve ultra-reliable low latency communications (URLLC), emphasizes extreme and rare events instead of well studied average ...
Baolin Chong, Han-Cheng Lu
semanticscholar   +1 more source

Energy-Efficient Multi-Agent Reinforcement Learning for UAV Trajectory Optimization in Cell-Free Massive MIMO Networks

IEEE Transactions on Wireless Communications
To enhance global data transmission, uncrewed aerial vehicle (UAV)-aided space-air-ground integrated networks (SAGIN) represent a pivotal direction for future advancements.
Zhi-Long Liu   +3 more
semanticscholar   +1 more source

Cooperative Sensing in Cell-Free Massive MIMO ISAC Systems: Performance Optimization and Signal Processing

IEEE Transactions on Wireless Communications
Emerging applications such as low-altitude economy and intelligent transportation hold the promise of significant economic and social benefits, requiring the support of technologies that integrate robust communication with precise sensing.
Hao-Tian Liu   +5 more
semanticscholar   +1 more source

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