Results 41 to 50 of about 215 (157)

Direct blind multiuser detection without channel estimation and equalizer design

Tongxin xuebao, 2005
The blind equalization and multiuser detection problem for synchronous high-rate DS-CDMA systems in dispersive channels was considered. Using only the spreading code of the desired user and the property that the transmitted signals belong to the finite ...
ZHANG Zhi-yong1, LING Yun2
doaj   +2 more sources

DS/CDMA Multiuser Detectors Based on Subspace Methods

Semina: Ciências Exatas e Tecnológicas, 2006
In this work blind and group-blind (Bld-MuD and SBld-MuD, respectively) multiuser detectors (MuD) are analyzed from the point of view of the trade-off between performance versus complexity; specifically, the blind and group-blind detectors are ...
Paul Jean Etienne Jeszensky, Jaime Laelson Jacob, Taufik Abrão   +2 more
doaj  

Innovative Channel Estimation Methods for Massive MIMO Using GAN Architectures

IET Communications, Volume 19, Issue 1, January/December 2025.
This paper proposes a novel channel estimation framework for massive multiple‐input multiple‐output (MIMO) systems using conditional generative adversarial networks with a U‐Net‐based generator and sequential convolutional neural network discriminator.
Sakhshra Monga, Nitin Saluja, Roopali Garg, A. F. M. Shahen Shah, John Ekoru, Milka Madahana   +5 more
wiley   +1 more source

An Immersive Virtual Reality Bimanual Telerobotic System With Haptic Feedback

IET Cyber-Systems and Robotics, Volume 7, Issue 1, January/December 2025.
ABSTRACT In robotic bimanual teleoperation, multimodal sensory feedback plays a crucial role, providing operators with a more immersive operating experience, reducing cognitive burden and improving operating efficiency. In this study, we develop an immersive bilateral isomorphic bimanual telerobotic system, which comprises dual arms and dual dexterous ...
Han Xu, Mingqi Chen, Gaofeng Li, Lei Wei, Shichi Peng, Haoliang Xu, ZunRan Wang, Huibin Cao, Qiang Li   +8 more
wiley   +1 more source

Maximum likelihood multi-user MIMO detection with blind modulation classification

Scientific Reports
Multi-User MIMO (MU-MIMO) detection plays a pivotal role in modern wireless receivers, yet practical downlink deployments are severely bottlenecked when co-scheduled users employ unknown and highly heterogeneous modulation formats.
Peng Wang, Eryi Hu
doaj   +1 more source

‘Being There Together for Health’: A Systematic Review on the Feasibility, Effectiveness and Design Considerations of Immersive Collaborative Virtual Environments in Health Applications

Human Behavior and Emerging Technologies, Volume 2025, Issue 1, 2025.
Effectively using immersive multiuser environments for digital applications (via virtual, augmented and mixed reality technologies) beckons the future of healthcare delivery in the metaverse. We aimed to evaluate the feasibility and effectiveness of immersive multiuser environments used in health applications while identifying their design features. We
Tohid Zarei, Michelle Emery, Dimitrios Saredakis, Gun A. Lee, Ben Stubbs, Ancret Szpak, Tobias Loetscher, Jim Morgan   +7 more
wiley   +1 more source

Blind downlink channel estimation for TDD‐based multiuser massive MIMO in the presence of nonlinear HPA

ETRI Journal, 2019
In time division duplex (TDD)‐based multiuser massive multiple input multiple output (MIMO) systems, the uplink channel is estimated and the results are used in downlink for signal detection. Owing to noisy uplink channel estimation, the downlink channel
Parisa Pasangi, Mahmoud Atashbar, Mahmood Mohassel Feghhi   +2 more
doaj   +1 more source

From Adaptive Communication Anti‐Jamming to Intelligent Communication Anti‐Jamming: 50 Years of Evolution

Advanced Intelligent Systems, Volume 6, Issue 8, August 2024.
This article reviews intelligent communication anti‐jamming evolution from adaptive methods to game theory and machine learning advancements. The concept of intelligent anti‐jamming is defined, and a system architecture is proposed. It highlights challenges, research findings, and future directions, aiming to provide a comprehensive understanding and ...
Quan Zhou, Yingtao Niu
wiley   +1 more source

Blind Reduced-Rank MMSE Detector for DS-CDMA Systems

EURASIP Journal on Advances in Signal Processing, 2002
We first develop a reduced-rank minimum mean squared error (MMSE) detector for direct-sequence (DS) code division multiple access (CDMA) by forcing the linear MMSE detector to lie in a signal subspace of a reduced dimension.
Ge Hongya, Akansu Ali N, Cai Xiaodong
doaj   +1 more source

Blind adaptive receiver for uplink multiuser massive MIMO systems

ETRI Journal, 2019
Herein, we consider uplink multiuser massive multiple‐input multiple‐output systems when multiple users transmit information symbols to a base station (BS) by applying simple space‐time block coding (STBC).
Joonwoo Shin, Bangwon Seo
doaj   +1 more source