Results 211 to 220 of about 20,641 (239)

Cell Free Massive MIMO with Constrained Coverage

Wireless Personal Communications, 2017
As new generations of mobile radio come into service, bandwidth is becoming more and more scarce and systems with very high spectral efficiency become vital. Having a high spectral efficiency, Massive MIMO has shown to be a promising candidate for 5G. Distributing antennas in such systems make them even more spectrally efficient. Cell free Massive MIMO
Mahdi N. Boroujerdi, Aliazam Abbasfar, Mohammad Ghanbari   +2 more
openaire   +1 more source

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, S. Mashdour, L. Landau, P. B. Da Silva, R. D. de Lamare   +4 more
semanticscholar   +1 more source

Cell-Free Massive MIMO Symbiotic Radio for IoT: RIS or BD?

IEEE Transactions on Wireless Communications
Cell-free massive multiple-input multiple-output symbiotic radio (CF-mMIMO-SR) is a promising technology to address the requirements of high-rate and spectrum-efficient communication for the Internet of Things (IoT). However, in the conventional CF-mMIMO-
Feiyang Li, Qiang Sun, Xiaomin Chen, Bile Peng, Jiayi Zhang, kai-kit Wong   +5 more
semanticscholar   +1 more source

Transformer-Based Power Optimization for Max-Min Fairness in Cell-Free Massive MIMO

IEEE Wireless Communications Letters
Power allocation is an important task in wireless communication networks. Classical optimization algorithms and deep learning methods, while effective in small and static scenarios, become either computationally demanding or unsuitable for large and ...
Irched Chafaa, G. Bacci, L. Sanguinetti
semanticscholar   +1 more source

WMMSE-Based Processing in Cell-Free Massive MIMO Systems

IEEE Wireless Communications Letters
In this letter, we address the weighted sum-rate maximization problem in a cell-free massive multi-input multi-output (CF-mMIMO) system, subject to constraints on the minimum individual quality of service (QoS), maximum power consumption at each access ...
Jiafei Fu, Z. Mobini, H. Ngo, Pengcheng Zhu, M. Matthaiou   +4 more
semanticscholar   +1 more source

Mobile Edge Computing Aided Cell-Free Massive MIMO Networks

IEEE Transactions on Mobile Computing
A mobile edge computing (MEC) aided cell-free massive MIMO network is investigated in this paper that aims at optimizing the task offloading process from the wireless devices to the MEC server.
G. Femenias, F. Riera-Palou
semanticscholar   +1 more source

Active STAR-RIS Aided Cell-Free Massive MIMO: A Performance Study

IEEE Transactions on Vehicular Technology
This paper investigates the spectral efficiency (SE) of an active simultaneously transmitting and reflecting reconfigurable intelligent surface (aSTAR-RIS) aided cell-free massive multiple-input multiple-output (CF-mMIMO) system under correlated Rayleigh
Xiangjun Ma, Member Ieee Xianfu Lei, L. S. M. I. P. Takis Mathiopoulos, Senior Member Ieee Daniel Benevides da Costa   +3 more
semanticscholar   +1 more source

Rate-Splitting Multiple Access in Cell-Free Massive MIMO-URLLC Systems: Achievable Rate Analysis and Optimization

IEEE Transactions on Communications
Rate-splitting multiple access (RSMA) has emerged as a potent paradigm shift in wireless communications, demonstrating resilience to channel state information (CSI) inaccuracies and significant rate enhancements. This work investigates RSMA’s application
Yao Zhang, Haitao Zhao, Yijie Mao, Wenchao Xia, Weidang Lu, Hongbo Zhu   +5 more
semanticscholar   +1 more source

Cell-Free Massive MIMO-OFDM with Low-Resolution ADCs

2025 23rd International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt)
Cell-free massive MIMO (multiple-input multiple-output) is a promising infrastructure for 6G and beyond, offering significantly higher spectral efficiency than traditional cellular systems. In cell-free massive MIMO, a large number of low-cost access points (APs) are densely deployed, making hardware impairments inevitable due to cost-effective radio ...
Demir, Özlem Tuǧfe, Elbir, Ahmet M., Björnson, Emil   +2 more
openaire   +2 more sources

Pilot and Data Power Control for Scalable Uplink Cell-Free Massive MIMO

IEEE Open Journal of the Communications Society
This paper investigates pilot and data power optimization for cell-free massive MIMO (CF-mMIMO). We propose an iterative algorithm that jointly updates pilot and data power levels to improve channel estimation and ensure reliable data transmission. Pilot
S. Mohammadzadeh, Mostafa Rahmani Ghourtani, K. Cumanan, Alister G. Burr, Pei Xiao   +4 more
semanticscholar   +1 more source