Results 41 to 50 of about 234,339 (94)

Blind Adaptive Beamforming Based on Constrained Constant Modulus RLS Algorithm for Smart Antennas [PDF]

ISWCS 2007, 2013
In this paper, we study the performance of blind adaptive beamforming algorithms for smart antennas in realistic environments. A constrained constant modulus (CCM) design criterion is described and used for deriving a recursive least squares (RLS) type optimization algorithm. Furthermore, two kinds of scenarios are considered in the paper for analyzing
arxiv  

An Efficient Hybrid Beamforming Design for Massive MIMO Receive Systems via SINR Maximization Based on an Improved Bat Algorithm [PDF]

arXiv, 2018
Hybrid analog and digital (HAD) beamforming has been recently receiving considerable deserved attention for a practical implementation on the large-scale antenna systems. As compared to full digital beamforming, partial-connected HAD beamforming can significantly reduce the hardware cost, complexity, and power consumption.
arxiv  

Low-Complexity Robust Data-Adaptive Dimensionality Reduction Based on Joint Iterative Optimization of Parameters [PDF]

arXiv, 2014
This paper presents a low-complexity robust data-dependent dimensionality reduction based on a modified joint iterative optimization (MJIO) algorithm for reduced-rank beamforming and steering vector estimation. The proposed robust optimization procedure jointly adjusts the parameters of a rank-reduction matrix and an adaptive beamformer.
arxiv  

A Fully Quaternion-Valued Capon Beamformer Based on Crossed-Dipole Arrays [PDF]

arXiv, 2017
Quaternion models have been developed for both direction of arrival estimation and beamforming based on crossed-dipole arrays in the past. However, for almost all the models, especially for adaptive beamforming, the desired signal is still complex-valued and one example is the quaternion-Capon beamformer.
arxiv  

Robust Capon Beamforming via Shaping Beam Pattern [PDF]

arXiv, 2013
High sidelobe level and direction of arrival (DOA) estimation sensitivity are two major disadvantages of the Capon beamforming. To deal with these problems, this paper gives an overview of a series of robust Capon beamforming methods via shaping beam pattern, including sparse Capon beamforming, weighted sparse Capon beamforming, mixed norm based Capon ...
arxiv  

Robust Adaptive Beamforming with Optimal Covariance Matrix Estimation in the Presence of Gain-Phase Errors. [PDF]

Sensors (Basel), 2020
Yao D, Zhang X, Hu B, Yang Q, Wu X.
europepmc   +1 more source

Robust Adaptive Beamforming with Sensor Position Errors Using Weighted Subspace Fitting-Based Covariance Matrix Reconstruction. [PDF]

Sensors (Basel), 2018
Chen P, Yang Y, Wang Y, Ma Y.
europepmc   +1 more source

Run-Time Adaptation of Neural Beamforming for Robust Speech Dereverberation and Denoising [PDF]

arXiv
This paper describes speech enhancement for realtime automatic speech recognition (ASR) in real environments. A standard approach to this task is to use neural beamforming that can work efficiently in an online manner. It estimates the masks of clean dry speech from a noisy echoic mixture spectrogram with a deep neural network (DNN) and then computes a
arxiv  

Deep Learning based Computer-vision for Enhanced Beamforming [PDF]

arXiv
Meeting the high data rate demands of modern applications necessitates the utilization of high-frequency spectrum bands, including millimeter-wave and sub-terahertz bands. However, these frequencies require precise alignment of narrow communication beams between transmitters and receivers, typically resulting in significant beam training overhead. This
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