Results 51 to 60 of about 61,754 (211)
IEEE Open Journal of Antennas and Propagation, 2023 The holographic multiple-input-multiple-output (MIMO) communications refer to the MIMO systems built with ultra-dense antenna arrays, whose channel models and potential applications have attracted increasing attentions recently.
Shuai S. A. Yuan +3 more
doaj +1 more source
Iterative Mode-Dropping for the Sum Capacity of MIMO-MAC with Per-Antenna Power Constraint [PDF]
, 2012 We propose an iterative mode-dropping algorithm that optimizes input signals to achieve the sum capacity of the MIMO-MAC with per-antenna power constraint. The algorithm successively optimizes each user's input covariance matrix by applying mode-dropping
Vu, Mai, Zhu, Yang
core +1 more source
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
Location‐Assisted Graph‐Based User Scheduling in Multi‐User MIMO LEO NTN Systems
International Journal of Satellite Communications and Networking, EarlyView.ABSTRACT This paper addresses user clustering and scheduling for multi‐user MIMO low Earth orbit nonterrestrial network systems in full frequency reuse. Since the number of on‐ground user terminals is usually much higher than the number of on‐board LEO satellite antennas, user scheduling becomes a fundamental task.
Bilal Ahmad +4 more
wiley +1 more source
IEEE Access, 2020 In this paper, 4 × 4/8 × 8/10 × 10 multiple input multiple output (MIMO) antenna systems composed of co-located self-neutralized antenna pairs are proposed to operate at 4.8-5.0 GHz (part of N77 band) for the fifth-generation (5G ...
Chong-Zhi Han +3 more
doaj +1 more source
Micromachines, 2023 This article presents the circularly polarized antenna operating over 28 GHz mm-wave applications. The suggested antenna has compact size, simple geometry, wideband, high gain, and offers circular polarization.
Fatma Taher +8 more
doaj +1 more source
Distributed MIMO systems with oblivious antennas [PDF]
2008 IEEE International Symposium on Information Theory, 2008 In Proc.
Simeone, Osvaldo +3 more
openaire +2 more sources
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
, 2017 In this paper, we implement hybrid Woodward-Lawson-Neural Networks and weighted Fourier method to synthesize antenna arrays. The neural networks (NN) is applied here to simplify the modeling of MIMO antenna arrays by assessing phases. The main problem is
Bouallegue, Ammar +5 more
core +1 more source
Facilitating Sodium‐Ion Diffusion in Fe‐Doped Co3O4 for High‐Rate Performance
Small, EarlyView.The limited rate performance of cobalt oxide (Co3O4) materials restricts their applicability in the rapid charge–discharge process of sodium‐ion batteries (SIBs). Iron (Fe) lattice doping can facilitate sodium‐ion diffusion by narrowing the bandgap and modulating the Co─O bond length.
Yonghuan Fu +7 more
wiley +1 more source