Results 71 to 80 of about 9,393 (232)

Adaptive Array Beamforming Using a Chaotic Beamforming Algorithm [PDF]

International Journal of Antennas and Propagation, 2016
The Chaotic beamforming adaptive algorithm is new adaptive method for antenna array’s radiation pattern synthesis. This adaptive method based on the optimization of the Least Mean Square algorithm using Chaos theory enables fast adaptation of antenna array radiation pattern, reduction of the noisy reference signal’s impact, and the improvement of the ...
Ana Jovanović, Luka Lazović, Vesna Rubežić   +2 more
openaire   +2 more sources

Periodic and Aperiodic Alterations of Resting‐State EEG in Schizophrenia Spectrum Disorders: Cognitive and Clinical Insights

European Journal of Neuroscience, Volume 62, Issue 7, October 2025.
This study examined periodic and aperiodic EEG activity in schizophrenia spectrum disorder (SSD) using FOOOF across scalp and source‐level recordings. SSD patients showed increased theta power and aperiodic components, with dACC theta predicting cognitive impairment. Findings highlight altered excitation–inhibition dynamics and emphasize the utility of
Genc Hasanaj, Iris Jaeger, Berkhan Karsli, Enrico Schulz, Emanuel Boudriot, Lukas Roell, Maxim Korman, Marcel S. Kallweit, Fanny Dengl, Nicole Klimas, Kristin Fischer, Katharina Hanken, Verena Meisinger, Joanna Moussiopoulou, Vladislav Yakimov, Susanne Karch, Alkomiet Hasan, Andrea Schmitt, Peter Falkai, CDP Working Group, Oliver Pogarell, Florian J. Raabe, Elias Wagner, Matin Mortazavi, Daniel Keeser   +24 more
wiley   +1 more source

A Low-Cost Robust Distributed Linearly Constrained Beamformer for Wireless Acoustic Sensor Networks with Arbitrary Topology

, 2018
We propose a new robust distributed linearly constrained beamformer which utilizes a set of linear equality constraints to reduce the cross power spectral density matrix to a block-diagonal form.
Hendriks, Richard C., Heusdens, Richard, Koutrouvelis, Andreas I., Sherson, Thomas W.   +3 more
core   +1 more source

Angular CMA: A modified Constant Modulus Algorithm providing steering angle updates [PDF]

, 2011
Conventional blind beamforming algorithms have no direct notion of the physical Direction of Arrival angle of an impinging signal. These blind adaptive algorithms operate by adjusting the complex steering vector in the case of changing signal conditions ...
Blom, Koen C.H., Burgwal, Marcel D. van de, Kokkeler, André B.J., Rovers, Kenneth C., Smit, G.J.M.   +4 more
core   +2 more sources

Adaptive beamforming assisted dynamic channel allocation [PDF]

1999 IEEE 49th Vehicular Technology Conference (Cat. No.99CH36363), 2003
This paper is concerned with the comparative study of fixed channel allocation (FCA) and dynamic channel allocation (DCA) algorithms, many of which were proposed and studied, in terms of the achievable grade-of-service (GOS), by Chuang et al. (1994) throughout the past few years.
Blogh, J.S., Cherriman, P.J., Hanzo, L.
openaire   +2 more sources

Magnetoencephalographic detection of the epileptic activity localized in the hippocampus using stereotactic electroencephalography and magnetoencephalography simultaneously

Epilepsia, Volume 66, Issue 9, Page 3453-3464, September 2025.
Abstract Objective To evaluate the ability of magnetoencephalography (MEG) to detect the activity of a deep brain structure, particularly the hippocampus, using simultaneous stereotactic electroencephalography (SEEG) and MEG recordings. Methods We included six patients with intractable temporal lobe epilepsy who underwent simultaneous SEEG and MEG.
Akitake Okamura, Akira Hashizume, Kota Kagawa, Go Seyama, Atsuo Yoshino, Shigeto Yamawaki, Nobutaka Horie, Koji Iida   +7 more
wiley   +1 more source

Robust Adaptive LCMV Beamformer Based On An Iterative Suboptimal Solution [PDF]

Radioengineering, 2015
The main drawback of closed-form solution of linearly constrained minimum variance (CF-LCMV) beamformer is the dilemma of acquiring long observation time for stable covariance matrix estimates and short observation time to track dynamic behavior of ...
Xiansheng Guo, Lei Chu, Baocang Li
doaj  

Image Enhancement and Noise Reduction Using Modified Delay-Multiply-and-Sum Beamformer: Application to Medical Photoacoustic Imaging

, 2018
Photoacoustic imaging (PAI) is an emerging biomedical imaging modality capable of providing both high contrast and high resolution of optical and UltraSound (US) imaging.
Mahloojifar, Ali, Mozaffarzadeh, Moein, Orooji, Mahdi   +2 more
core   +1 more source

Knowledge-aided adaptive beamforming

2008 IEEE International Conference on Acoustics, Speech and Signal Processing, 2008
In array processing, when the available snapshot number is comparable with or even smaller than the sensor number, the sample covariance matrix R is a poor estimate of the true covariance matrix R. To estimate R more accurately, prior environmental knowledge can be used, which is manifested as knowing an a priori covariance matrix R0.
X. Zhu, J. Li, P. Stoica
openaire   +1 more source

Synaptic inhibitory dynamics drive benzodiazepine response in pediatric status epilepticus

Epilepsia, Volume 66, Issue 8, Page 2980-2994, August 2025.
Abstract Objective Pediatric status epilepticus (SE) is a medical emergency associated with significant morbidity. Benzodiazepines (BZPs) are the current first‐line treatment, but do not work in more than one third of children presenting with SE. Animal studies have shown that SE can cause changes in synaptic inhibition signaling that can ultimately ...
Tommaso Fedele, Richard J. Burman, Anne Steinberg, Giorgio Selmin, Georgia Ramantani, Richard E. Rosch   +5 more
wiley   +1 more source