Results 51 to 60 of about 10,463 (206)
Optimization of Cell-Free Massive MIMO System
Journal of Physics: Conference Series, 2022 Abstract As an innovative implementation, Cell-Free Massive Multiple Input Multiple Output (MIMO) has appeared in typical Cellular Massive MIMO Networks. This protocol doesn’t recognize cells, as shown by its name, even though a significant number of APs operate on the same frequency/time resources.
Manmohan Sharma +2 more
openaire +1 more source
Cell-Free Massive MIMO with Limited Backhaul [PDF]
2018 IEEE International Conference on Communications (ICC), 2018 We consider a cell-free Massive multiple-input multiple-output (MIMO) system and investigate the system performance for the case when the quantized version of the estimated channel and the quantized received signal are available at the central processing unit (CPU), and the case when only the quantized version of the combined signal with maximum ratio ...
Bashar, Manijeh +4 more
openaire +3 more sources
Scalability Aspects of Cell-Free Massive MIMO [PDF]
ICC 2019 - 2019 IEEE International Conference on Communications (ICC), 2019 Paper published in ICC 2019 - 2019 IEEE International Conference on Communications (ICC). {\copyright} 2019 IEEE. Personal use of this material is permitted.
Interdonato G. +2 more
openaire +3 more sources
Downlink Spectral Efficiency of Cell-Free Massive MIMO with Full-Pilot Zero-Forcing
, 2018 Cell-free Massive multiple-input multiple-output (MIMO) ensures ubiquitous communication at high spectral efficiency (SE) thanks to increased macro-diversity as compared cellular communications.
Björnson, Emil +3 more
core +1 more source
Circuit-Aware Design of Energy-Efficient Massive MIMO Systems [PDF]
, 2014 Densification is a key to greater throughput in cellular networks. The full potential of coordinated multipoint (CoMP) can be realized by massive multiple-input multiple-output (MIMO) systems, where each base station (BS) has very many antennas. However,
Björnson, Emil +2 more
core +4 more sources
Frozen Differential Scattering in Reconfigurable Complex Media
Laser &Photonics Reviews, EarlyView.A localized perturbation universally results in a rank‐one update of the scattering matrix of any complex medium. The resulting differential output wavefront is “frozen”: its spatial pattern is fixed (agnostic to the input wavefront). Experiments with a programmable‐metasurface‐parametrized wireless link validate frozen differential scattering and ...
Philipp del Hougne
wiley +1 more source
Open Research Europe, 2022 Beyond fifth generation (5G) communication systems aim towards data rates in the tera bits per second range, with improved and flexible coverage options, introducing many new technological challenges in the fields of network architecture, signal ...
F. Ponzini +46 more
doaj +1 more source
Cell-Free and User-Centric Massive MIMO at Millimeter Wave Frequencies
, 2017 In a cell-free (CF) massive MIMO architecture a very large number of distributed access points (APs) simultaneously and jointly serves a much smaller number of mobile stations (MSs); a variant of the cell-free technique is the user-centric (UC) approach,
Alonzo, Mario, Buzzi, Stefano
core +1 more source
International Journal of Satellite Communications and Networking, EarlyView.ABSTRACT This study analyzes the architecture of the beyond 5G‐NTN (Non‐terrestrial Network) integrated network and presents the technical, legal, and regulatory challenges and considerations for expanding the Artificial Intelligence of Things (AIoT) ecosystem.
Byung Woon Kim, Ga Eun Choi
wiley +1 more source
Effective Channel Gain-Based Access Point Selection in Cell-Free Massive MIMO Systems
IEEE Access, 2020 In this paper, we investigate the selection problem of access points (APs) in cell-free massive multiple-input multiple-output (MIMO) systems, where APs equipped with a large number of antennas are geographically distributed over a wide area with no cell
Hieu Trong Dao, Sunghwan Kim
doaj +1 more source