Results 1 to 10 of about 7,523 (232)

Efficient 2D adaptive beamforming algorithm based on sparse array optimisation

The Journal of Engineering, 2019
In this study, a 2D adaptive beamforming algorithm for sparse array is proposed. Firstly, a signal model based on matrix completion theory for adaptive beamforming in sparse array is established, which is proved to satisfy null space property.
Chaoyu Wang, Can Zhu, Chunlin Chen, Hongtao Li   +3 more
doaj   +1 more source

Sleep magnetoencephalography enhances detection and source imaging of seizures and fast oscillations in focal cortical dysplasia

Epilepsia, EarlyView.
Abstract Objective Focal cortical dysplasia (FCD) causes drug‐resistant epilepsy requiring presurgical evaluation. Invasive electroencephalographic (EEG) studies demonstrate that sleep modulates epileptic activity, including interictal epileptiform discharges (IEDs), fast oscillations (FOs) in the beta (14–40 Hz) and gamma (40–80 Hz) frequency bands ...
Marcel Heers, Jawata Afnan, Christoph Braun, Christophe Grova, Dirk‐Matthias Altenmüller, Bernhard J. Steinhoff, Matthias Dümpelmann, Theo Demerath, Horst Urbach, Silke Ethofer, Markus Siegel, Andreas Schulze‐Bonhage, Holger Lerche, Yiwen Li Hegner   +13 more
wiley   +1 more source

Performance analysis for a class of robust adaptive beamformers [PDF]

, 2004
Robust adaptive beamforming is a key issue in array applications where there exist uncertainties about the steering vector of interest. Diagonal loading is one of the most popular techniques to improve robustness.
O. Besson, Besson, Olivier, F. Vincent, Vincent, François   +3 more
core   +1 more source

Efficient Hardware and Software Co-Design of Adaptive Digital Beamforming With DoA Estimation in RFSoC for 5G Communication Systems

IEEE Access
Adaptive digital beamforming is a crucial technique used in 5G communication systems for transmitting or receiving signals only in the desired directions.
Nageswara Rao Dusari, Meenakshi Rawat
doaj   +1 more source

Flexible wearable electronics for cardiovascular monitoring from surface signals to deep physiological insights

FlexMat, EarlyView.
This review organizes flexible wearable electronics for cardiovascular monitoring into four interconnected information layers: surface electrophysiology, hemodynamic sensing, vascular imaging, and biofluid biomarker analysis. This framework clarifies how electrical rhythm, vascular loading, structural and flow‐related features, and biochemical states ...
Qiao Chen, Hongwen Chen, Yuanyuan Li, Pingan Yang, Rui Li, Zhihao Zhou   +5 more
wiley   +1 more source

Low-Complexity Robust Capon Beamforming Based on Reduced-Rank Technique

Journal of Electrical and Computer Engineering, 2015
Existing robust Capon beamformers achieve robustness against steering vector errors at a high cost in terms of computational complexity. Computationally efficient robust Capon beamforming approach based on the reduced-rank technique is proposed in this ...
Zaifang Xi, Xiao-feng Wu, Shuyue Wu, Zhijun Tang, Shigang Hu   +4 more
doaj   +1 more source

Review of millimeter‐wave and terahertz near‐field synthetic aperture radar imaging technology

InfoScience, EarlyView.
Abstract This paper comprehensively reviews the development of millimeter‐wave (MMW) and terahertz (THz) near‐field imaging technologies, with an emphasis on the state of synthetic aperture radar (SAR)‐based imaging technologies. Near‐field imaging technologies are categorized into passive and active imaging modes, among which active imaging is favored
Qi Yang, Hongqiang Wang, Xu Chen, Xin Peng   +3 more
wiley   +1 more source

Multi-Beam Radar Communication Integrated System Design

Information, 2023
In this paper, we propose a multi-beam integrated radar and communication scheme using phased-array antenna, in which the same LFM-BPSK integrated waveform is used for both the radar and the communication beams.
Hao Ma, Jun Wang, Xin Sun, Wenxin Jin
doaj   +1 more source

Non‐Uniform Programmable Photonic Waveguide Meshes

Laser &Photonics Reviews, EarlyView.
Integrating defect cells into uniform hexagonal waveguide meshes overcomes the fundamental spectral and temporal limitations of programmable photonics. By leveraging the Vernier effect through non‐uniform coupled cavities, this architecture achieves a tenfold increase in free spectral range and ultra‐fast sampling times, paving the way for next ...
Cristina Catalá‐Lahoz, José Capmany
wiley   +1 more source

Performance analysis of beamformers using generalized loading of the covariance matrix in the presence of random steering vector errors [PDF]

, 2005
Robust adaptive beamforming is a key issue in array applications where there exist uncertainties about the steering vector of interest. Diagonal loading is one of the most popular techniques to improve robustness.
Besson, Olivier, Vincent, François
core   +1 more source