oh;, ji-hye
A cell-free massive multiple input multiple output (MIMO) system is an attractive network model that is in the spotlight in 5G and future communication systems. Despite numerous advantages, the cell-free massive MIMO system has a problem in that it is difficult to operate in reality due to its vast amount of calculation. The user-centric cell-free ...
danfeng zhao, tongzhou han;
In the user-centric, cell-free, massive multi-input, multi-output (MIMO) orthogonal frequency division multiplexing (OFDM) system, a large number of deployed access points (APs) serve user equipment (UEs) simultaneously, using the same time–frequency resources, and the system is able to ensure fairness between each user; moreover, it is robust agai...
Shaik, Zakir Hussain Sarvendranath, Rimalapudi Larsson, Erik G.
RadioWeaves network operates a large number ofdistributed antennas using cell-free architecture to provide highdata rates and support a large number of users. Operating thisnetwork in an energy-efficient manner in the limited availablespectrum is crucial. Therefore, we consider energy efficiency(EE) maximization of a RadioWeaves network that shares...
wu;, chia-yi
Cell-free massive multiple-input multiple-output (MIMO) has attracted wide attention as wireless spectral efficiency has become a 6G key performance indicator. The distributed scheme improves the spectral efficiency and user fairness, but the fronthaul network must evolve to enable it. This work demonstrates a fronthaul network for distributed ante...
danfeng zhao, tongzhou han;
In centralized massive multiple-input multiple-output (MIMO) systems, the channel hardening phenomenon can occur, in which the channel behaves as almost fully deterministic as the number of antennas increases. Nevertheless, in a cell-free massive MIMO system, the channel is less deterministic. In this paper, we propose using instantaneous channel s...
Xia, Xinjiang Zhu, Pengcheng Li, Jiamin Wu, Hao Wang, Dongming Xin, Yuanxue
Published in
Science China Information Sciences
In this paper, we investigate duplex mode selection and transceiver design for cell-free massive multiple-input multiple-output (MIMO) with network-assisted full duplexing (NAFD), where the remote antenna units (RAUs) simultaneously serve both uplink and downlink users on the same time-frequency resource, and the joint transmission and reception ar...
zhou;, xu meng
This paper concentrates on the rate analysis and optimization for a downlink cell-free massive multi-input multi-output (MIMO) system with mixed digital-to-analog converters (DACs), where some of the access points (APs) use perfect-resolution DACs, while the others exploit low-resolution DACs to reduce hardware cost and power consumption. By using ...
Munochiveyi, Munyaradzi Pogaku, Arjun Chakravarthi Do, Dinh-Thuan Le, Anh-Tu Vozňák, Miroslav Nguyen, Nhan Duc
Reconfigurable intelligent surface (RIS)-aided communication is considered as an exciting research topic in academic and industrial communities since it provides an emerging affordable solution to achieve high quality and secure next-generation wireless systems. Especially, the deployment of RIS in multi-user wireless networks promises to reduce sy...