Sparse Non-Uniform Linear Array-Based Propagator Method for Direction of Arrival Estimation

Article Engineering, Electrical & Electronic

High-order propagator-based DOA estimators using a coprime array without the source number

Shaozhi Guo et al.

Summary: A novel DOA estimating method based on the coprime array is proposed, which can work without a priori information and improves estimation accuracy using fourth-order statistics.

SIGNAL IMAGE AND VIDEO PROCESSING (2023)

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Article Computer Science, Information Systems

A New Generation of Fast and Low-Memory Smart Digital/Geometrical Beamforming MIMO Antenna

Kandasamy Pirapaharan et al.

Summary: This paper presents a smart MIMO antenna configuration with an innovative beamforming technique to improve network coverage and tracking. By optimizing phase delay factors and adding phase shifters, the antenna achieves high directional gain and low cost. The paper also demonstrates effective control of beam width and beamsteering.

ELECTRONICS (2023)

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Editorial Material Computer Science, Information Systems

Smart Antenna Optimization Techniques for Wireless Applications

Kannadhasan Suriyan et al.

ELECTRONICS (2023)

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Article Construction & Building Technology

Seismic Behaviors of Novel Steel-Reinforced Concrete Composite Frames Prestressed with Bonding Tendons

Jing Ji et al.

Summary: This study investigated the seismic behaviors of novel steel-reinforced concrete composite frames prestressed with bonding tendons. Finite element models of the frames were established using ABAQUS software, and static analysis was conducted to explore the load-displacement curves. The influences of different parameters on the seismic behaviors were investigated. The results showed that the frames had good mechanisms of strong columns and weak beams, and the parameters such as the steel ratio of angle steel and the slenderness ratio of frame columns had significant effects on the seismic behaviors.

BUILDINGS (2023)

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Article Engineering, Electrical & Electronic

2D DOA Estimation Through a Spiral Array Without the Source Number

Jianzhong Li et al.

Summary: A spiral array is designed in this paper to estimate the two-dimensional direction of arrival (DOA). The use of the fourth-order cumulant and convex optimization improves the estimation accuracy and overcomes the bias caused by finite snapshots.

CIRCUITS SYSTEMS AND SIGNAL PROCESSING (2022)

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Article Chemistry, Multidisciplinary

Subspace Pseudointensity Vectors Approach for DoA Estimation Using Spherical Antenna Array in the Presence of Unknown Mutual Coupling

Oluwole John Famoriji et al.

Summary: The estimation of direction-of-arrival (DoA) using a spherical antenna array (SAA) is an important task in signal processing with various industrial applications. This paper proposes a technique for DoA estimation using SAA with unknown mutual coupling and validates its effectiveness and robustness through simulations and experimental data.

APPLIED SCIENCES-BASEL (2022)

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Article Engineering, Electrical & Electronic

DOA Estimation for Transmit Beamspace MIMO Radar via Tensor Decomposition With Vandermonde Factor Matrix

Feng Xu et al.

Summary: This paper addresses the problem of tensor decomposition in two-dimensional transmit beamspace (TB) multiple-input multiple-output (MIMO) radar for direction-of-arrival (DOA) estimation. A higher-order tensor model is designed to enable computationally efficient DOA estimation by exploiting the Vandermonde structure of the factor matrices and shift-invariance within different transmit subarrays. The proposed tensor model and DOA estimation algorithm are applicable for both two-dimensional and one-dimensional TB MIMO radar scenarios.

IEEE TRANSACTIONS ON SIGNAL PROCESSING (2022)

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Article Telecommunications

Single Snapshot 2D-DOA Estimation in Wireless Location System

Veerendra Dakulagi

Summary: The research paper presents single-snapshot direction-of-arrival algorithms for a uniform circular array, utilizing ESPRIT and modified MUSIC algorithms for high-resolution estimation of DOAs. Experimental results and computer simulations confirm the effectiveness of the proposed methods in terms of accurate DOA estimation and reduced computational complexity.

WIRELESS PERSONAL COMMUNICATIONS (2021)

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Article Engineering, Electrical & Electronic

DOA and Range Estimation Using a Uniform Linear Antenna Array Without A Priori Knowledge of the Source Number

Jianzhong Li et al.

Summary: An efficient root-propagator method based on a uniform linear antenna array is proposed to estimate the directions of arrival and ranges of near-field sources without prior knowledge of the source number. By constructing propagators to achieve parameter estimation in a decoupled manner, the method shows superior performance for source localization, even without prior knowledge of the source number.

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION (2021)

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Article Chemistry, Analytical

Dual Cancelled Channel STAP for Target Detection and DOA Estimation in Passive Radar

Giovanni Paolo Blasone et al.

Summary: This paper introduces a dual cancelled channel space-time adaptive processing scheme for detection and direction of arrival estimation of slowly moving targets in multichannel mobile passive radar. The proposed scheme reduces computational complexity and required training data compared to conventional full array solutions, while maintaining comparable target detection capability and DOA estimation accuracy. The scheme also exhibits enhanced robustness against adaptivity losses, operating effectively even with limited training data in highly non-homogeneous clutter scenarios.

SENSORS (2021)

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Article Engineering, Electrical & Electronic

Gridless DOA Estimation and Root-MUSIC for Non-Uniform Linear Arrays

Mark Wagner et al.

Summary: The study addresses gridless direction of arrival estimation for a 1-D non-uniform array using irregular Toeplitz matrix and irregular Vandermonde decomposition. The method generalizes atomic norm minimization for non-uniform arrays and is solved using alternating projections, showing similar accuracy to convex relaxation for uniform linear arrays.

IEEE TRANSACTIONS ON SIGNAL PROCESSING (2021)

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Article Chemistry, Analytical