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   Articles with "beamformer" as a keyword



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Implementation of Phase Mode Beamforming Using Two Proposed Spherical Arrays

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recommendations! Published in 2017 at "Circuits, Systems, and Signal Processing"

DOI: 10.1007/s00034-016-0461-x

Abstract: Spherical harmonic array processing, also known as phase mode spherical sensor array processing, has been recently studied for different communication purposes. The spherical array arrangement presents desired three-dimensional symmetry, while the phase modes provide frequency-independent… read more here.

Keywords: array; phase mode; spherical array; beamformer ... See more keywords
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Experimental performance assessment of the sub‐band minimum variance beamformer for ultrasound imaging

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recommendations! Published in 2017 at "Ultrasonics"

DOI: 10.1016/j.ultras.2017.04.011

Abstract: HIGHLIGHTSExperimental performance of the sub‐band Minimum Variance beamformer is studied.Lateral FWHM was measured to 16.7 &mgr;m (&lgr;/12), from isolated wire‐targets.This result demonstrates 24‐fold improvement compared to conventional beamforming.No resolution benefits were found for imaging continuous… read more here.

Keywords: beamformer; variance beamformer; band; minimum variance ... See more keywords
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Regulated-Element Frost Beamformer for Vehicular Multimedia Sound Enhancement and Noise Reduction Applications

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recommendations! Published in 2017 at "IEEE Access"

DOI: 10.1109/access.2017.2775707

Abstract: 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… read more here.

Keywords: beamformer; frost beamformer; element frost; regulated element ... See more keywords
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Improving Swath Sonar Water Column Imagery and Bathymetry With Adaptive Beamforming

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recommendations! Published in 2020 at "IEEE Journal of Oceanic Engineering"

DOI: 10.1109/joe.2019.2926863

Abstract: Modern swath sonar is a mature technology today and has reached a very high level of sophistication including techniques to increase area coverage rate, data quality, and resolution. There is, however, often a need to… read more here.

Keywords: water column; beamformer; swath sonar; bathymetry ... See more keywords
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A 60-GHz Dual-Vector Doherty Beamformer

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recommendations! Published in 2017 at "IEEE Journal of Solid-State Circuits"

DOI: 10.1109/jssc.2017.2661980

Abstract: In this paper, we demonstrate a 60-GHz transmit beamformer implemented in 130-nm SiGe BiCMOS technology which includes a Doherty amplifier driven by a dual-vector phase rotator (DVR). In addition, a benchmarking circuit comprising another DVR… read more here.

Keywords: vector doherty; beamformer; doherty; dual vector ... See more keywords
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Beamformer Design and Utility Optimization for Hybrid Information and Energy Transfer With Massive MIMO

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recommendations! Published in 2018 at "IEEE Systems Journal"

DOI: 10.1109/jsyst.2016.2636373

Abstract: Consider a massive multiple-input multiple-output (MIMO) system, where the base station employing space-division multiple access simultaneously transmits information and energy to the information and energy users, respectively. The objective is to maximize the energy harvesting… read more here.

Keywords: information energy; information; beamformer; energy ... See more keywords
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Distortionless Beamforming Optimized With $\ell _1$ -Norm Minimization

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recommendations! Published in 2018 at "IEEE Signal Processing Letters"

DOI: 10.1109/lsp.2018.2834870

Abstract: We propose a beamforming method that minimizes the $\ell _1$ norm of a beamformer output vector under the same distortionless constraint as that of the conventional minimum power distortionless response (MPDR) beamformer. Using the $\ell… read more here.

Keywords: tex math; distortionless; beamformer; inline formula ... See more keywords
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Factorized MVDR Deep Beamforming for Multi-Channel Speech Enhancement

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recommendations! Published in 2022 at "IEEE Signal Processing Letters"

DOI: 10.1109/lsp.2022.3200581

Abstract: Traditionally, adaptive beamformers such as the minimum-variance distortionless response (MVDR) beamformer and generalized eigenvalue beamformer have been widely used for multi-channel speech enhancement with a single-channel postfilter. Recently, several approaches have been proposed to enhance… read more here.

Keywords: mvdr beamformer; multi channel; speech; beamformer ... See more keywords
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Robust Beamforming Design for Covert Communications

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recommendations! Published in 2021 at "IEEE Transactions on Information Forensics and Security"

DOI: 10.1109/tifs.2021.3071602

Abstract: In this paper, we consider a common unicast beamforming network where Alice utilizes the communication to Carol as a cover and covertly transmits a message to Bob without being recognized by Willie. We investigate the… read more here.

Keywords: beamformer; design covert; robust beamforming; beamforming design ... See more keywords
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Improving Image Quality for Single-Angle Plane Wave Ultrasound Imaging With Convolutional Neural Network Beamformer

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recommendations! Published in 2022 at "IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control"

DOI: 10.1109/tuffc.2022.3152689

Abstract: Ultrafast ultrasound imaging based on plane wave (PW) compounding has been proposed for use in various clinical and preclinical applications, including shear wave imaging and super resolution blood flow imaging. Because the image quality afforded… read more here.

Keywords: quality; plane wave; beamformer; image ... See more keywords
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Experimental investigation of the unit circle minimum variance distortionless response adaptive beamformer

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recommendations! Published in 2017 at "Journal of the Acoustical Society of America"

DOI: 10.1121/1.5014477

Abstract: Source masking occurs when loud interferers produce high side lobes in the conventional beamformer (CBF) scanned response, obscuring the true direction-of-arrival of the desired signal. The minimum variance distortionless response (MVDR) adaptive beamformer (ABF) places… read more here.

Keywords: beamformer; response; unit; unit circle ... See more keywords