Results 61 to 70 of about 637,438 (171)

The Downlink Performance for Cell-Free Massive MIMO with Instantaneous CSI in Slowly Time-Varying Channels

Entropy, 2021
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.
Tongzhou Han, Danfeng Zhao
doaj   +1 more source

Fundamental Challenges, Physical Implementations, and Integration Strategies for Ising Machines in Large‐Scale Optimization Tasks

Advanced Electronic Materials, Volume 12, Issue 17, 7 September 2026.
Ising machines are emerging as specialized hardware solvers for computationally hard optimization problems. This review examines five major platforms—digital CMOS, analog CMOS, emerging devices, coherent optics, and quantum systems—highlighting physics‐rooted advantages and shared bottlenecks in scalability and connectivity.
Hyunjun Lee, Joon Pyo Kim, Sanghyeon Kim
wiley   +1 more source

Throughput Analysis of Massive MIMO Uplink With Low-Resolution ADCs

, 2017
We investigate the uplink throughput achievable by a multiple-user (MU) massive multiple-input multiple-output (MIMO) system, in which the base station is equipped with a large number of low-resolution analog-to-digital converters (ADCs). Our focus is on
Giuseppe Durisi, Gustavsson, Ulf, Durisi, Giuseppe,, Coldrey, Mikael, Durisi, Giuseppe, Jacobsson, Sven,, Sven Jacobsson, Ulf Gustavsson, Christoph Studer, Gustavsson, Ulf,, Studer, Christoph, Studer, Christoph,, Mikael Coldrey, Jacobsson, Sven, Coldrey, Mikael,, Studer, Christoph; id_orcid   +15 more
core   +1 more source

A Generalized Spatial Modulation System Using Massive MIMO Space Time Coding Antenna Grouping

Entropy, 2020
Massive multiple input multiple output (MIMO), also known as a very large-scale MIMO, is an emerging technology in wireless communications that increases capacity compared to MIMO systems.
Amira I. Zaki, Mahmoud Nassar, Moustafa H. Aly, Waleed K. Badawi   +3 more
doaj   +1 more source

Compact Quad‐Port Octagonal‐Shaped MIMO Antenna for n257/n260/n261‐Band Applications

Engineering Reports, Volume 8, Issue 9, September 2026.
A compact quad‐port octagonal MIMO antenna is developed for 5G NR FR2 n257/n260/n261 applications, achieving dual‐band operation, high isolation, low ECC, and strong diversity performance. The design supports high‐speed, low‐latency mm‐wave communication for next‐generation IoT and wireless devices.
Akash Kumar Gupta, Sanjeev Kumar, Sachin Kumar, Qazi Fasihuddin, Zubairuddin Mohammed, Jibitesh Kumar Panda   +5 more
wiley   +1 more source

Decentralized Distributed Massive MIMO [PDF]

In this paper, we introduce the concept of "Decentralized Distributed Massive MIMO" (multiple-input multipleoutput), which decentralizes the baseband processing to the network edge and distributes the Massive MIMO (also known as cell-free massive MIMO ...
Zhao, Junbo, Burr, Alister Graham, Rahmani, Mostafa   +2 more
core   +1 more source

Integrated LEO Constellation and In‐Cabin Distribution System for Continuous Aircraft 5G Connectivity

International Journal of Satellite Communications and Networking, Volume 44, Issue 5, Page 594-606, September/October 2026.
ABSTRACT The integration of low Earth orbit (LEO) satellite constellations with commercial aircraft communication systems presents critical challenges in maintaining continuous connectivity during dynamic flight conditions. Current geostationary satellite systems suffer from high round‐trip latency ( > 500 ms) and inadequate coverage at high latitudes,
Raúl Parada, Victor Monzon Baeza, Carlos Horcajo Fernández de Gamboa, Rocío Serrano Camacho, Carlos Monzo   +4 more
wiley   +1 more source

Linear Precoding With Low-Resolution DACs for Massive MU-MIMO-OFDM Downlink

, 2019
We consider the downlink of a massive multiuser (MU) multiple-input multiple-output (MIMO) system in which the base station (BS) is equipped with low-resolution digital-to-analog converters (DACs). In contrast to most existing results, we assume that the
Durisi, Giuseppe,, Studer, Christoph, Studer, Christoph,, Coldrey, Mikael, Jacobsson, Sven, Durisi, Giuseppe, Coldrey, Mikael,, Jacobsson, Sven,, Studer, Christoph; id_orcid   +8 more
core   +1 more source

Optical Phased Arrays on Photonic Integrated Circuit Platforms: Challenges, Opportunities, and Future Applications

Nanophotonics, Volume 15, Issue 14, 27 July 2026.
Integrated optical phased arrays are emerging as scalable engines for solid‐state beam steering and programmable wavefront control. This Review maps the field from beam‐steering principles and core building blocks to material platforms, system‐level bottlenecks, and application frontiers, highlighting how heterogeneous integration, aperiodic ...
Jingwei Li, Yuyuan Han, Aoxiang Chen, Pengpeng Li, Xinglin Zhu, Guanbao Zhao, Luohan Peng, Huaibin Zheng   +7 more
wiley   +1 more source

Optimized Joint Relay and Antenna Selection for Enhanced Full‐Duplex Relay Networks

Engineering Reports, Volume 8, Issue 7, July 2026.
This study proposes a joint relay and antenna selection strategy for full‐duplex amplify‐and‐forward relay networks. By adaptively optimizing transmitter–receiver configurations based on channel conditions, the method reduces self‐interference, lowers outage probability, and symbol error rate, and enhances spectral efficiency, offering a scalable ...
Deepika Rani Sona, Visalakshi Annepu, Kalapraveen Bagadi, Olutayo O. Oyerinde   +3 more
wiley   +1 more source