Results 71 to 80 of about 17,521 (206)

Regularised Hyper Parameter Bi Level Optimisation With Continual Learning Based Deep Neural Network for Beamforming in Ultra‐Wide Band System

IET Communications, Volume 20, Issue 1, January/December 2026.
This research proposes a Regularised Hyperparameter Bilevel Optimisation with Continual Learning‐based Deep Neural Network (RHBO‐CLDNN) for beamforming in an Ultra‐Wide Band (UWB) system. The RHBO ensures the hyperparameter efficiency at both upper and lower levels, which allows DNN to fine‐tune the unique characteristics of the UWB system, which leads
Pradeep Kumar Siddanna, Bidare Divakarachari Parameshachari, Dharmanna Shivappa Lamani   +2 more
wiley   +1 more source

Secure Transmission in ISAC Systems Aided by Active STAR‐RIS

IET Communications, Volume 20, Issue 1, January/December 2026.
This paper investigates the secure transmission problem in an active simultaneous transmitting and reflecting intelligent reflecting surfaces (STAR‐RIS)‐aided integrated sensing and communication downlink system. Our objective is to maximize the sum secrecy rate by jointly optimizing the base station beamforming vectors, the sensing signal covariance ...
Baofeng Ji, Xinhao Guo, Shahid Mumtaz
wiley   +1 more source

Experimental demonstration of non-line-of-sight visible light communication with different reflecting materials using a GaN-based micro-LED and modified IEEE 802.11ac

AIP Advances, 2018
This paper gives an experimental demonstration of non-line-of-sight (NLOS) visible light communication (VLC) using a single 80 μm gallium nitride (GaN) based micro-light-emitting diode (micro-LED).
Zhijian Lu, Pengfei Tian, Houqiang Fu, Jossue Montes, Xuanqi Huang, Hong Chen, Xiaodong Zhang, Xiaoyan Liu, Ran Liu, Lirong Zheng, Xiaolin Zhou, Erdan Gu, Yi Liu, Yuji Zhao   +13 more
doaj   +1 more source

A RSSI/PDR-Based Probabilistic Position Selection Algorithm with NLOS Identification for Indoor Localisation

ISPRS International Journal of Geo-Information, 2018
In recent years, location-based services have been receiving increasing attention because of their great development prospects. Researchers from all over the world have proposed many solutions for indoor positioning over the past several years.
Ke Han, Huashuai Xing, Zhongliang Deng, Yichen Du   +3 more
doaj   +1 more source

Comparative Study Between Measurement and Predictions Using Geometrical Optics and Uniform Theory of Diffraction for Case of Non-Line-of-Sight (NLOS) in Indoor Environment [PDF]

Wireless Personal Communications, 2012
This paper describes the investigation and comparison of the accuracy of a deterministic model for a WLAN system in the indoor environment. The measurement system consisted of a spectrum analyzer and a log-periodic antenna. Non-line-of-sight (NLOS) propagation (in furnished rooms) was investigated.
Cheng, Ee Meng, Abbas, Zulkifly, Abd Malek, Mohd Fareq, Lee, Kim Yee, You, Kok Yeow, Khor, Shing Fhan   +5 more
openaire   +2 more sources

Spatio‐Temporal cGAN Based Channel Estimation for Low‐Altitude Integrated Sensing and Communication Systems

Electronics Letters, Volume 62, Issue 1, January/December 2026.
Reliable channel estimation in low‐altitude ISAC is challenged by UAV‐induced fast‐varying and non‐stationary channels. We present an ST‐cGAN framework that jointly models spatial and temporal features under conditional adversarial learning, achieving superior accuracy and robustness compared with conventional and deep learning baselines.
Guixin Pan, Honghui Xu, Yixuan Wang, Kang Kang, Wenbin Li, Tianyi Liu   +5 more
wiley   +1 more source

A Stochastic Geometry Framework for Enhancing Communication Efficiency and Road Safety in Connected and Autonomous Vehicles

IET Intelligent Transport Systems, Volume 20, Issue 1, January/December 2026.
This paper introduces a stochastic geometry‐based analytical framework to evaluate and enhance communication reliability and road safety in connected autonomous vehicles (CAVs). By modeling roads using Poisson Line Processes and vehicle distributions with Poisson Point Processes, the framework enables accurate assessment of key performance metrics like
Anjum Mohd Aslam, Aditya Bhardwaj, Xiaochun Cheng   +2 more
wiley   +1 more source

milliProxy: a TCP Proxy Architecture for 5G mmWave Cellular Systems

, 2017
TCP is the most widely used transport protocol in the internet. However, it offers suboptimal performance when operating over high bandwidth mmWave links.
Mezzavilla, Marco, Panwar, Shivendra, Polese, Michele, Rangan, Sundeep, Zhang, Menglei, Zhu, Jing, Zorzi, Michele   +6 more
core   +1 more source

A 3D Non‐Stationary Wideband GBSM for Low‐Altitude UAV Channels in Rail Environments

IET Microwaves, Antennas &Propagation, Volume 20, Issue 1, January/December 2026.
This paper presents a three‐dimensional (3D) wideband non‐stationary Geometry‐Based Stochastic Channel Model (GBSM) for low‐altitude unmanned aerial vehicle (UAV) communications. Distinct from existing modelling frameworks, the proposed model integrates air‐to‐air (A2A) and air‐to ground (A2G) scenarios into a generalised channel model. Moreover, a two‐
Cheng Li, Kunye Hong, Jingjing Du, Yating Gao, Pei Tang, Lei Xiong   +5 more
wiley   +1 more source

LOS and NLOS identification in real indoor environment using deep learning approach

Digital Communications and Networks
Visibility conditions between antennas, i.e. Line-of-Sight (LOS) and Non-Line-of-Sight (NLOS) can be crucial in the context of indoor localization, for which detecting the NLOS condition and further correcting constant position estimation errors or ...
Alicja Olejniczak, Olga Blaszkiewicz, Krzysztof K. Cwalina, Piotr Rajchowski, Jaroslaw Sadowski   +4 more
doaj   +1 more source