Results 51 to 60 of about 1,206,111 (210)

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

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

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  

Performance of Rate Splitting Multiple Access-based Visible Light Communications with Residual Interference and Channel Estimation Errors

Journal of Communications Software and Systems
Rate splitting multiple access (RSMA) is a powerful and upcoming multiple access technique that can serve as a promising technology for 5G and beyond applications.
Sundaresan Sabapathy, Surendar Maruthu
doaj   +1 more source

Bendlet Transform Based Adaptive Denoising Method for Microsection Images

Entropy, 2022
Magnetic resonance imaging (MRI) plays an important role in disease diagnosis. The noise that appears in MRI images is commonly governed by a Rician distribution. The bendlets system is a second-order shearlet transform with bent elements.
Shuli Mei, Meng Liu, Aleksey Kudreyko, Piercarlo Cattani, Denis Baikov, Francesco Villecco   +5 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

Super Wideband MIMO Systems: Channel Modeling and Performance Analysis

IEEE Open Journal of the Communications Society
This paper develops a physically-consistent channel model for analyzing super wideband (SW) multiple-input-multiple-output (MIMO) communication systems that experience strong mutual coupling (MC).
Sachitha C. Bandara, Erfan Khordad, Peter J. Smith, Robin J. Evans, Rajitha Senanayake   +4 more
doaj   +1 more source

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

Performance Analysis of Dense Small Cell Networks With Practical Antenna Heights Under Rician Fading

IEEE Access, 2018
In this paper, we examine the combined impacts of distance-dependent Rician fading channel model and the absolute difference between the heights of base station (BS) and user equipment (UE) antennas on the coverage probability and the area spectral ...
Amir H. Jafari, David Lopez-Perez, Ming Ding, Jie Zhang   +3 more
doaj   +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