Results 41 to 50 of about 2,236 (212)

Design of 2D Planar Sparse Binned Arrays Based on the Coarray Analysis

Sensors, 2021
The analysis of the beampattern is the base of sparse arrays design process. However, in the case of bidimensional arrays, this analysis has a high computational cost, turning the design process into a long and complex task.
Óscar Martínez-Graullera, Júlio Cesar Eduardo de Souza, Montserrat Parrilla Romero, Ricardo Tokio Higuti   +3 more
doaj   +1 more source

Sparse Convolutional Beamforming for 3-D Ultrafast Ultrasound Imaging

, 2021
International audienceReal-time 3-D ultrasound (US) provides a complete visualization of inner body organs and blood vasculature, crucial for diagnosis and treatment of diverse diseases.
Cohen, Regev, Liebgott, Herve, Eldar, Yonina, Fingerhut, Nitai, Varray, François   +4 more
core   +1 more source

Joint Spatial-Polarimetric Sparse-Reconstruction Beamforming for Interference Mitigation in Dual-Polarized Arrays [PDF]

International Journal of Telecommunications
This paper presents a novel approach to beamforming using joint spatial and polarization domains through a polarimetric sparse-reconstruction (PSR) framework.
Amgad Salama
doaj   +1 more source

On sparse beamformer design with reverberation

Applied Mathematical Modelling, 2018
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Zhibao Li, Ka Fai Cedric Yiu, Yu-Hong Dai   +2 more
openaire   +3 more sources

Hybrid Precoding Using Out-of-Band Spatial Information for Multi-User Multi-RF-Chain Millimeter Wave Systems

IEEE Access, 2020
With a tremendous amount of underutilized bandwidth, millimeter wave (mmWave) communication is a promising solution to meet the increasing data-rate demands.
Zhannan Li, Chaozhu Zhang, I-Tai Lu, Xinghua Jia   +3 more
doaj   +1 more source

Adaptive Beamforming for Sparse Array Based on Semi-Definite Programming

IEEE Access, 2018
An adaptive beamforming (ABF) technique for sparse receiving arrays with gain/phase uncertainties is proposed. The basic idea of the proposed method is using the compressed sensing theory to estimate directions and amplitudes of the received signals with
Bin Hu, Xiaochuan Wu, Xin Zhang, Qiang Yang, Weibo Deng   +4 more
doaj   +1 more source

Complex-valued symmetric radial basis function network for beamforming

, 2009
The complex-valued radial basis function (RBF) network proposed by Chen et al. (1994) has found many applications for processing complex-valued signals, in particular, for communication channel equalization and signal detection.
Sheng Chen, Chen, Sheng
core   +1 more source

High-Resolution Imaging of Multi-Beam Uniform Linear Array Sonar Based on Two-Stage Sparse Deconvolution Method

Remote Sensing
Classical beamforming (CBF) beamforming constrains the accuracy and quality of underwater acoustic imaging by producing wide main-lobes that reduce resolution, high sidelobes that cause leakage, and point-spread functions that blur targets.
Jian Wang, Junhong Cui, Ruo Li, Haisen Li, Jing Wang   +4 more
doaj   +1 more source

Array Shading to Maximize Deflection Coefficient for Broadband Signal Detection With Conventional Beamforming

IEEE Access, 2021
This paper develops and applies a numerical optimization procedure to compute broadband noise-adaptive weights for delay and sum beamforming that are conditioned to maximize the deflection coefficient at the output of a square law detector for a given ...
Kaushallya Adhikari, Blaine M. Harker, Thomas A. Wettergren, Lauren A. Freeman, Simon E. Freeman   +4 more
doaj   +1 more source

A Robust Capon Beamforming Approach for Sparse Array Based on Importance Resampling Compressive Covariance Sensing

IEEE Access, 2019
Reconstructing the interference-plus-noise covariance matrix instead of searching for the optimal diagonal loading factor for the sample covariance matrix is a good method for calculating the adaptive beamforming coefficients.
Yuguan Hou, Hefu Gao, Qinghong Huang, Jinzi Qi, Xingpeng Mao, Cunfeng Gu   +5 more
doaj   +1 more source