Results 51 to 60 of about 798,977 (204)

Semantic Communication-Based Multiple Description Coding for Robust Image Transmission Over Wireless Channels

IEEE Access
The explosive growth of multimedia traffic over wireless networks demands robust image transmission mechanisms that maintain perceptual quality under channel impairments.
Prabhath Samarathunga, Udara Jayasinghe, Yasith Ganearachchi, Thanuj Fernando, Thushan Sivalingam, Nandana Rajatheva, Anil Fernando   +6 more
doaj   +1 more source

Novel polar-coded space-time transmit diversity scheme over Rician fading MIMO channels

EURASIP Journal on Wireless Communications and Networking, 2018
In this paper, a polar-coded space-time transmit diversity (STTD) scheme is proposed in order to improve the performance of multiple-input multiple-output (MIMO) system.
Bowen Feng, Shushi Gu, Jian Jiao, Shaohua Wu, Qinyu Zhang   +4 more
doaj   +1 more source

Effective Modeling of Continuous Wave Z‐Spectra for Quantitative CEST and CESL MRI Across Exchange Regimes

Magnetic Resonance in Medicine, Volume 96, Issue 5, Page 2474-2488, November 2026.
Purpose Chemical exchange saturation transfer (CEST) and chemical exchange‐sensitive spin‐lock (CESL) MRI enable spectroscopic imaging with high sensitivity, but conventional analysis methods often fail as exchange approaches the fast‐exchange limit.
Chris Lippe, Verena Hoerr
wiley   +1 more source

A Framework for Training-Based Estimation in Arbitrarily Correlated Rician MIMO Channels With Rician Disturbance

IEEE Transactions on Signal Processing, 2010
In this paper, we create a framework for training-based channel estimation under different channel and interference statistics. The minimum mean square error (MMSE) estimator for channel matrix estimation in Rician fading multi-antenna systems is analyzed, and especially the design of mean square error (MSE) minimizing training sequences.
Emil Björnson, Björn E. Ottersten
openaire   +4 more sources

Space–Air–Ground-Integrated Networks: The BER vs. Residual Delay and Doppler Analysis

IEEE Open Journal of Vehicular Technology
Perfect Doppler compensation and synchronization is nontrivial due to multi-path Doppler effects and Einstein's theory of relativity in the space-air-ground-integrated networks (SAGINs).
Chao Zhang, Kunlun Li, Chao Xu, Lie-Liang Yang, Lajos Hanzo   +4 more
doaj   +1 more source

High‐Temporal‐Resolution Monitoring of Creatine and Phosphocreatine Dynamics in Skeletal Muscle Using Ultrafast Z‐Spectroscopy (UFZ) CEST MRI at 3T

Magnetic Resonance in Medicine, Volume 96, Issue 4, Page 1798-1805, October 2026.
ABSTRACT Purpose To evaluate the feasibility of High‐Temporal‐Resolution (HTR) Ultrafast Z‐spectrum (UFZ) CEST MRI for monitoring the dynamic fluctuations of phosphocreatine (PCr) and creatine (Cr) in human skeletal muscle (SM) at 3 T during and after exercise.
Licheng Ju, T. Jake Samuel, Michael Schär, Kexin Wang, Yihan Wu, Robert G. Weiss, Jiadi Xu   +6 more
wiley   +1 more source

Analysis of Coded FHSS Systems with Multiple Access Interference over Generalized Fading Channels

EURASIP Journal on Wireless Communications and Networking, 2008
We study the effect of interference on the performance of coded FHSS systems. This is achieved by modeling the physical channel in these systems as a block fading channel.
Zummo SalamA
doaj  

Technical Feasibility of IVIM for Prostate Cancer Imaging Using High‐Amplitude Whole‐Body Gradient System With Spiral Readout and Velocity‐Compensated Diffusion Encoding

NMR in Biomedicine, Volume 39, Issue 10, October 2026.
The combination of velocity‐compensated diffusion encoding, spiral readout and strong gradients enabled high‐quality prostate IVIM imaging, offering a promising framework for the development of reliable IVIM‐based biomarkers for prostate cancer detection, characterisation and monitoring.
Malwina Molendowska, Ivan A. Rashid, Kieran Foley, Lars Mueller, Lars E. Olsson, Patrik Brynolfsson, Filip Szczepankiewicz   +6 more
wiley   +1 more source

DeepRelaxo: Fast Mono‐Exponential Magnitude Brain R2* Mapping With Reduced Echoes Using Self‐Supervised Deep Learning

Magnetic Resonance in Medicine, Volume 96, Issue 3, Page 1293-1302, September 2026.
ABSTRACT Purpose We introduce DeepRelaxo, a fast and generalizable deep learning method for estimating brain R2* maps from multi‐echo gradient echo (ME‐GRE) acquisitions with arbitrary echo configurations, including shortened echo trains for accelerated scans.
Samiha Prima, Zhuang Xiong, Alan H. Wilman, Hongfu Sun   +3 more
wiley   +1 more source

Slow Frequency-Hopping Multicarrier DS-CDMA for Transmission over Nakagami Multipath Fading Channels

, 2001
A novel multiple access scheme based on slow frequency hopping multicarrier direct-sequence code division multiple access (SFH/MC DS-CDMA) is proposed and investigated, which can be rendered compatible with the existing second-generation narrowband CDMA ...
Yang, L-L., Hanzo, L.
core   +1 more source