Results 21 to 30 of about 234,339 (94)
An Efficient Slow-Time Adaptation for Massive MIMO Hybrid Beamforming in mm-Wave Time-Varying Channels [PDF]
arXiv, 2020 In this paper, adaptive hybrid beamforming methods are proposed for millimeter-wave range massive multiple-input-multiple-output (MIMO) systems considering single carrier wideband transmission in uplink data mode. A statistical analog beamformer is adaptively constructed in slow-time, while the channel is time-varying and erroneously estimated.
arxiv
Pseudo‐MRI Engine for MRI‐Free Electromagnetic Source Imaging
Human Brain Mapping, Volume 46, Issue 2, February 1, 2025.A tool, pseudo‐MRI engine, was implemented to generate subject‐specific template MRIs based on scalp digitization that can readily be used for MEG/EEG source imaging. The geometrical and source‐imaging similarity with real MRI proves that the method can be an alternative to individual MRIs in various MEG/EEG applications.
Amit Jaiswal +2 more
wiley +1 more source
Robust Regularized Least-Squares Beamforming Approach to Signal Estimation [PDF]
arXiv, 2016 In this paper, we address the problem of robust adaptive beamforming of signals received by a linear array. The challenge associated with the beamforming problem is twofold. Firstly, the process requires the inversion of the usually ill-conditioned covariance matrix of the received signals.
arxiv
Enhancing Satellite Link Security Against Drone Eavesdropping Through Cooperative Communication
International Journal of Satellite Communications and Networking, Volume 43, Issue 1, Page 10-22, January/February 2025.ABSTRACT Integrated satellite terrestrial networks (ISTNs) are emerging as a promising next‐generation communication technology, for example, B5G and 6G, with low‐earth orbit (LEO) satellites playing a growing role. However, the complex and unique characteristics of ISTNs make them more susceptible to cyberattacks.
Rajnish Kumar, Shlomi Arnon
wiley +1 more source
Energy-Efficient Deterministic Adaptive Beamforming Algorithms for Distributed Sensor/Relay Networks [PDF]
arXiv, 2015 In this study, energy-efficient deterministic adaptive beamforming algorithms are proposed for distributed sensor/relay networks. Specifically, DBSA, D-QESA, D-QESA-E, and a hybrid algorithm, hybrid-QESA, that combines the benefits of both deterministic and random adaptive beamforming algorithms, are proposed. Rigorous convergence analyses are provided
arxiv
The Journal of Physiology, Volume 603, Issue 4, Page 873-893, 15 February 2025.Abstract figure legend Magnetoencephalography data from stroke survivors, healthy, age‐matched control participants and healthy young participants were measured during the execution of a thumb movement task. Movement‐related high‐gamma power was evident in all three groups with a maximum over motor cortical areas contralateral to the performed movement.
Benjamin Haverland +13 more
wiley +1 more source
Water Resources Research, Volume 61, Issue 1, January 2025.Abstract Monitoring groundwater tables (GWTs) remains challenging due to limited spatial and temporal observations. This study introduces an innovative approach combining an artificial neural network, specifically a multilayer perceptron (MLP), with continuous passive Multichannel Analysis of Surface Waves (passive‐MASW) to construct GWT depth maps ...
José Cunha Teixeira +7 more
wiley +1 more source
Robust Adaptive Beamforming Algorithms Based on the Constrained Constant Modulus Criterion [PDF]
arXiv, 2013 We present a robust adaptive beamforming algorithm based on the worst-case criterion and the constrained constant modulus approach, which exploits the constant modulus property of the desired signal. Similarly to the existing worst-case beamformer with the minimum variance design, the problem can be reformulated as a second-order cone (SOC) program and
arxiv
Resource allocation for integrated satellite‐terrestrial networks based on RSMA
IET Communications, Volume 19, Issue 1, January/December 2025.We first establish a downlink transmission framework for the integrated satellite‐terrestrial network based on RSMA, to achieve high data rate transmission of virtual reality applications globally. Then, considering some practical constraints, a joint resource allocation problem of rate and transmission power is formulated.
Jianfeng Shi +3 more
wiley +1 more source
Physical layer security in satellite communication: State‐of‐the‐art and open problems
IET Communications, Volume 19, Issue 1, January/December 2025.This paper first classifies contemporary satellite communication networks into five domains and then analyse the use of PLS in each domain; these domains are hybrid satellite‐terrestrial networks, satellite‐based IoT, navigation satellite systems, FSO‐based satellites, and inter‐satellite communications.
Nora Abdelsalam +2 more
wiley +1 more source