Results 121 to 130 of about 2,822,972 (301)
Ultrasound Nondestructive Evaluation (NDE) Imaging with Transducer Arrays and Adaptive Processing
Sensors, 2011 This paper addresses the challenging problem of ultrasonic non-destructive evaluation (NDE) imaging with adaptive transducer arrays. In NDE applications, most materials like concrete, stainless steel and carbon-reinforced composites used extensively in ...
Minghui Li, Gordon Hayward
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Rationale for and design of a generic tiled hierarchical phased array beamforming architecture [PDF]
, 2007 The purpose of the phased array beamforming project is to develop a generic flexible efficient phased array receiver platform, using a mixed signal hardware/software-codesign approach.
Burgwal, M.D. van de +3 more
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Tongxin xuebao, 2013 For the robust adaptive beamforming problem of the gen l signal models, a robust beamforming algorithm based on the worst-case performance optimization with positive semi-definite constraints was proposed.
Ding-jie XU, Rui HE, Feng SHEN
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The Journal of Engineering, 2019 Here, the authors propose a novel robust adaptive beamforming method, which is robust to both of the covariance matrix mismatch and the steering vector estimation mismatch.
Lei Yu +3 more
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Robust Regularized Least-Squares Beamforming Approach to Signal Estimation [PDF]
arXiv, 2016 In this paper, we address the problem of robust adaptive beamforming of signals received by a linear array. The challenge associated with the beamforming problem is twofold. Firstly, the process requires the inversion of the usually ill-conditioned covariance matrix of the received signals.
arxiv
Remote SensingFloating high-frequency surface-wave radar provides an effective solution to widening the range of detection by such radar systems. However, for high-frequency radars with long coherence integration times, the yaw angle variations during this period can ...
Xianzhou Yi +6 more
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FPGA-based Low Latency Inverse QRD Architecture for Adaptive Beamforming in Phased Array Radars [PDF]
Radioengineering, 2017 The main objective of this paper is to facilitate the adaptive beamforming which is one of the most challenging task in phased array radars receivers.
R. Irfan, H. Rasheed, W. A. Toor
doaj
Double Minimum Variance Beamforming Method to Enhance Photoacoustic Imaging [PDF]
arXiv, 2018 One of the common algorithms used to reconstruct photoacoustic (PA) images is the non-adaptive Delay-and-Sum (DAS) beamformer. However, the quality of the reconstructed PA images obtained by DAS is not satisfying due to its high level of sidelobes and wide mainlobe. In contrast, adaptive beamformers, such as minimum variance (MV), result in an improved
arxiv
An Efficient Slow-Time Adaptation for Massive MIMO Hybrid Beamforming in mm-Wave Time-Varying Channels [PDF]
arXiv, 2020 In this paper, adaptive hybrid beamforming methods are proposed for millimeter-wave range massive multiple-input-multiple-output (MIMO) systems considering single carrier wideband transmission in uplink data mode. A statistical analog beamformer is adaptively constructed in slow-time, while the channel is time-varying and erroneously estimated.
arxiv
Virtual covariance matrix reconstruction-based adaptive beamforming for small aperture array. [PDF]
PLoS One, 2023 Chang L, Zhang H, Yang H, Lv T, Tang N.
europepmc +1 more source