Results 1 to 10 of about 2,822,972 (301)
Adaptive Beamforming Applied to OFDM Systems [PDF]
Sensors, 2018 This work proposes an adaptive beamforming scheme applied to time domain, pre-FFT (Fast Fourier Transformation), Orthogonal Frequency-Division Multiplexing (OFDM) systems.
Tiago F. B. de Sousa +2 more
doaj +6 more sources
Domain Adaptation for Ultrasound Beamforming [PDF]
arXiv, 2020 Ultrasound B-Mode images are created from data obtained from each element in the transducer array in a process called beamforming. The beamforming goal is to enhance signals from specified spatial locations, while reducing signal from all other locations. On clinical systems, beamforming is accomplished with the delay-and-sum (DAS) algorithm.
Matthew Berger +4 more
arxiv +5 more sources
Deep Long Short-Term Memory Adaptive Beamforming Networks For Multichannel Robust Speech Recognition [PDF]
2017 IEEE International Conference on Acoustics, Speech and Signal
Processing (ICASSP), New Orleans, LA, 2017, pp. 271-275, 2017 Far-field speech recognition in noisy and reverberant conditions remains a challenging problem despite recent deep learning breakthroughs. This problem is commonly addressed by acquiring a speech signal from multiple microphones and performing ...
Erdogan, Hakan +3 more
core +2 more sources
Symmetrical Component Adaptive Beamforming [PDF]
The Journal of the Acoustical Society of America, 1968 The theory of symmetrical components, long used in connection with fault-current analyses of multiphase power-distribution systems, has been applied to the problem of adaptive beamforming with the result that the response of a spatially diverse array of sensors can be made virtually free of the effects of the stationary part of the surrounding noise ...
William E. Klund
openalex +3 more sources
Adaptive Wideband Beamforming Based on Digital Delay Filter [PDF]
Journal of Microwaves, Optoelectronics and Electromagnetic Applications, 2016 A novel adaptive wideband beamforming method is proposed, where beamforming is achieved by LMS based space-time adaptive filtering algorithm. Conventional broadband beamforming requires desired signal to be incident from the broadside i.e.
Zeeshan Ahmad, Song Yaoliang, Qiang Du
doaj +2 more sources
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 ...
Ana Jovanović +2 more
doaj +2 more sources
Iterative robust adaptive beamforming
EURASIP Journal on Advances in Signal Processing, 2017 The minimum power distortionless response beamformer has a good interference rejection capability, but the desired signal will be suppressed if signal steering vector or data covariance matrix is not precise. The worst-case performance optimization-based
Yang Li, Hong Ma, Li Cheng
doaj +3 more sources
Robust adaptive beamforming algorithm
Tongxin xuebao, 2009 The performance of least mean squares（LMS） algorithm degraded dramatically in the presence of even slight steering vector mismatches.In order to overcome the shortage,a novel robust adaptive beamforming algorithm based on the variable diagonal loading ...
SONG Xin +3 more
doaj +3 more sources
IEEE Journal of Microwaves, 2023 A closed-loop far-field wireless power transfer (WPT) system with adaptive waveform and beamforming using limited feedback is designed, prototyped, and experimented.
Shanpu Shen, Junghoon Kim, Bruno Clerckx
doaj +1 more source
Mapping Interictal activity in epilepsy using a hidden Markov model: A magnetoencephalography study
Human Brain Mapping, Volume 44, Issue 1, Page 66-81, January 2023., 2023 In this study, we use hidden Markov modeling (HMM) to create a unique statistical model of interictal brain activity for 10 pediatric epilepsy patients. This data‐driven model produces an output unique to each patient, and is used to localize the epileptogenic area(s).
Zelekha A. Seedat +13 more
wiley +1 more source