Results 21 to 30 of about 9,393 (232)
IEEE Access, 2017 A key requirement of an adaptive sensor array involves the ability to deterministically adjust the directional response of the array to reduce noise and reverberations, null interferences, and enhance the gain and recognition of the desired signal.
Sunday C. Ekpo +2 more
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Adaptive beamforming for large arrays in satellite communications systems with dispersed coverage [PDF]
, 2011 Conventional multibeam satellite communications systems ensure coverage of wide areas through multiple fixed beams where all users inside a beam share the same bandwidth. We consider a new and more flexible system where each user is assigned his own beam,
Besson, Olivier +2 more
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Adaptive beamforming for photoacoustic imaging [PDF]
Optics Letters, 2008 An adaptive photoacoustic image reconstruction technique that combines coherence factor (CF) weighting and the minimum variance (MV) method is introduced. The backprojection method is widely used to reconstruct photoacoustic tomography images. Owing to the scattering of light, the quality of the photoacoustic imaging can be degraded.
Suhyun, Park +3 more
openaire +2 more sources
Adaptive Null Widening Beamforming Algorithm in Spatially Correlated Color Noise
Sensors, 2022 Under the background of spatially correlated color noise, the incidence angle of a jamming signal in a high-speed moving platform rapidly changes, which leads to the degradation of the anti-interference performance and the waveform distortion of the ...
Shijing Xiao, Bin Li, Qing Wang
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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
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Design and analysis of Maxwell fisheye lens based beamformer
Scientific Reports, 2021 Antenna arrays and multi-antenna systems are essential in beyond 5G wireless networks for providing wireless connectivity, especially in the context of Internet-of-Everything.
Muhammad Ali Babar Abbasi +3 more
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Iterative turbo beamforming for OFDM based hybrid terrestrial-satellite mobile system [PDF]
, 2012 In the context of orthogonal frequency division multiplexing (OFDM)-based systems, pilot-based beamforming (BF) exhibits a high degree of sensitivity to the pilot sub-carriers.
Evans, B.G., Imran, M.A., Khan, A.H.
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Multi-Rank Adaptive Beamforming
IEEE/SP 13th Workshop on Statistical Signal Processing, 2005, 2005 This paper presents a multi-rank generalization of the Capon beamformer to accommodate model mismatch in situations where the unknown signal of interest lies in a multidimensional subspace. By expanding the beamforming subspace robustness (or diversity) is achieved at the expense of resolution.
Scharf, Louis L. +2 more
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Fast Wideband Beamforming Using Convolutional Neural Network
Remote Sensing, 2023 With the wideband beamforming approaches, the synthetic aperture radar (SAR) could achieve high azimuth resolution and wide swath. However, the performance of conventional adaptive wideband time-domain beamforming is severely affected as the received ...
Xun Wu +4 more
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Robust adaptive beamforming based on zone orthogonal constraint and steering vector estimation [PDF]
JASA Express Letters, 2023 This Letter solves steering vector estimation under mismatch for adaptive beamforming. The proposed beamformer implements a stepwise estimation of steering vector, and zone orthogonal constraint is added first based on adaptive constraint framework from ...
Kun Guo +4 more
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