Results 1 to 10 of about 2,749,514 (184)

Numerical Reconstruction of the Covariance Matrix of a Spherically Truncated Multinormal Distribution [PDF]

Journal of Probability and Statistics, 2017
We relate the matrix SB of the second moments of a spherically truncated normal multivariate to its full covariance matrix Σ and present an algorithm to invert the relation and reconstruct Σ from SB.
Filippo Palombi, Simona Toti, Romina Filippini   +2 more
doaj   +4 more sources

Robust Adaptive Beamforming Algorithm for Sparse Array Based on Covariance Matrix Reconstruction Technology

International Journal of Antennas and Propagation, 2022
When the array structure of the sparse arrays (SA) cannot be determined, the existing beamforming algorithms designed according to specific formations such as coprime arrays (CA), nested arrays (NA), etc. will fail.
Yuxi Du, Weijia Cui, Yinsheng Wang, Chunxiao Jian, Jian Zhang   +4 more
doaj   +1 more source

High‐accuracy DOA estimation via parallel sparse nested array with extended aperture and reduced mutual coupling

Electronics Letters, 2023
This letter proposes a novel parallel sparse nested array and then provides a matrix reconstruction‐based method with three steps, to enhance the performance of direction of arrival (DOA) estimation in practice.
Yunlong Yang, Guojun Jiang
doaj   +1 more source

Self-Interference Suppression of Unmanned Underwater Vehicle with Vector Hydrophone Array Based on an Improved Autoencoder

Journal of Marine Science and Engineering, 2023
The self-interference of an unmanned underwater vehicle (UUV) weakens its ability to detect targets of interest. Due to limitations in the size of the sonar array and the complexity of the interference, the performance of existing self-interference ...
Jin Fu, Wenfeng Dong, Longhao Qiu, Chunpeng Zhao, Zherui Wang   +4 more
doaj   +1 more source

Direction-of-Arrival Estimation Under Array Sensor Failures with ULA

IEEE Access, 2020
In this paper, to address the problem of array sensors failure, we propose a covariance matrix reconstruction method for direction-of-arrival (DOA) estimation.
Bing Sun, Chenxi Wu, Junpeng Shi, Huai-Lin Ruan, Wen-Qiang Ye   +4 more
doaj   +1 more source

Wi-Fi co-channel interference suppression approach in LTE uplink

Tongxin xuebao, 2012
Considering the Wi-Fi co-channel interference in the 3rd generation mobile communication long term evolution (LTE) uplink with multi-received antennas,a new combining approach named interference reconstruction rejection Combining was proposed.Firstly,as ...
Wan-zhi MA, Hong-zhi ZHAO, Hui-yue YU, Jun WANG, You-xi TANG   +4 more
doaj   +2 more sources

Direction of Arrival Estimation and Robust Adaptive Beamforming With Unfolded Augmented Coprime Array

IEEE Access, 2020
An augmented coprime array systematically employs two sparse subarrays to produce a large-scale difference co-array with attractive merits, such as enhanced degrees of freedom (DOFs) and enlarged array aperture, whereas the interleaved subarrays are ...
Kun Zhang, Chong Shen, Hanwen Li, Zhuang Li, Haifeng Wang, Xiaoyan Chen, Jing Chen   +6 more
doaj   +1 more source

High Performance Robust Adaptive Beamforming in the Presence of Array Imperfections

International Journal of Antennas and Propagation, 2016
A high performance robust beamforming scheme is proposed to combat model mismatch. Our method lies in the novel construction of interference-plus-noise (IPN) covariance matrix. The IPN covariance matrix consists of two parts.
Wenxing Li, Xiaojun Mao, Zhuqun Zhai, Yingsong Li   +3 more
doaj   +1 more source

An Improved Multiple-Toeplitz Matrices Reconstruction Algorithm for DOA Estimation of Coherent Signals [PDF]

Radioengineering, 2021
The Toeplitz matrix reconstruction algorithms exploit the row vector of an array output covariance matrix to reconstruct Toeplitz matrix, which provide the direction-of-arrival (DOA) estimation of coherent signals.
B. B. Qi, W. Li
doaj  

Underdetermined DOA Estimation of Wideband LFM Signals Based on Gridless Sparse Reconstruction in the FRF Domain

Sensors, 2019
An underdetermined direction of arrival (DOA) estimation method of wideband linear frequency modulated (LFM) signals is proposed without grid mismatch.
Yue Cui, Junfeng Wang, Jie Qi, Zhanying Zhang, Jinqi Zhu   +4 more
doaj   +1 more source