An iterative dictionary learning-based algorithm for DOA estimation

H Zamani, H Zayyani, F Marvasti - IEEE Communications …, 2016 - ieeexplore.ieee.org
This letter proposes a dictionary learning algorithm for solving the grid mismatch problem in
direction of arrival (DOA) estimation from both the array sensor data and from the sign of the …

Off-grid localization in MIMO radars using sparsity

A Abtahi, S Gazor, F Marvasti - IEEE Signal Processing Letters, 2018 - ieeexplore.ieee.org
In this letter, we propose a new accurate approach for target localization in multiple-input
multiple-output (MIMO) radars, which exploits the sparse spatial distribution of targets to …

Multi-user massive MIMO channel estimation using joint sparsity and non-ideal feedback modeling

N Sadeghi, M Azghani - Digital Signal Processing, 2020 - Elsevier
In order to realize the advantages of the massive MIMO systems, the channel state
information must be obtained at the base station (BS). However, it is a challenging task in …

L2-Regularized Iterative Weighted Algorithm for Inverse Scattering

M Azghani, F Marvasti - IEEE Transactions on Antennas and …, 2016 - ieeexplore.ieee.org
We propose a new inverse scattering technique based on sparsity for the application of
microwave imaging. The underdetermined inverse problem appeared in the distorted born …

Missing low-rank and sparse decomposition based on smoothed nuclear norm

M Azghani, A Esmaeili, K Behdin… - IEEE Transactions on …, 2019 - ieeexplore.ieee.org
Recovering low-rank and sparse components from missing observations is an essential
problem in various fields. In this paper, we have proposed a method to address the missing …

Distributed sparsity-based non-linear regression with multiple kernels in wireless sensor networks

RA Abbasabad, M Azghani - Ad Hoc Networks, 2022 - Elsevier
In this paper, we investigate the problem of non-linear time-varying regression in a wireless
sensor network system. A field over an area is estimated using a number of fixed sensors …

An adaptive iterative thresholding algorithm for distributed MIMO radars

A Abtahi, M Azghani, F Marvasti - IEEE Transactions on …, 2018 - ieeexplore.ieee.org
In this paper, a Block Iterative Method with Adaptive Thresholding for Sparse Recovery
(BIMATSR) is proposed to recover the received signal in an under-sampled distributed …

Image copy‐move forgery detection using sparse recovery and keypoint matching

SF Hajialilu, M Azghani, N Kazemi - IET Image Processing, 2020 - Wiley Online Library
Copy‐move forgery (CMF) detection is one of the most practical problems in image
forensics. The authenticity of the image becomes more crucial when the images are used in …

Semi-Blind Sparse Channel Estimation Using Regularized Expectation Maximization

F Rahimpour, M Azghani - Digital Signal Processing, 2024 - Elsevier
In Massive multiple-input multiple-output (MIMO) systems, channel estimation is crucial. The
large size of the antennas causes a significant pilot and feedback overhead, making it …

2D off‐grid DOA estimation using joint sparsity

F Afkhaminia, M Azghani - IET Radar, Sonar & Navigation, 2019 - Wiley Online Library
Direction of arrival (DOA) estimation is an essential task in the array signal processing. In
this study, the authors attempt to address the off‐grid issue for the two‐dimensional (2D) …