Direction finding ≈ Direction finding
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Direction Finding in the Presence of Direction-Dependent Mutual Coupling Open
Direction-of-arrival (DOA) estimation in the presence of mutual coupling (MC) is an important problem in direction-finding applications. Previous methods in the literature assume that the MC in the array is modeled with a single direction-…
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Direction Finding in MIMO Radar With Unknown Mutual Coupling Open
Multiple-input multiple-output (MIMO) radar has received much attention due to its potentials in offering improved performance for target detection and parameter estimation. It has been shown that the performance of direction finding techn…
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High‐Precision Direction‐of‐Arrival Estimations Using Digital Programmable Metasurface Open
Commonly, phased array antennas are used to provide spatial resolution for direction of arrival (DOA) estimations. However, the phase‐array‐based DOA estimations usually require complicated system architecture and signal processing. Digita…
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Hybrid Analog-Digital Processing System for Amplitude-Monopulse RSSI-Based MiMo WiFi Direction-of-Arrival Estimation Open
We present a cost-effective hybrid analog digital system to estimate the Direction of Arrival (DoA) of WiFi signals. The processing in the analog domain is based on simple wellknown RADAR amplitude monopulse antenna techniques. Then, using…
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3D Localization With a Single Partially-Connected Receiving RIS: Positioning Error Analysis and Algorithmic Design Open
In this paper, we introduce the concept of partially-connected receiving reconfigurable intelligent surfaces (R-RISs), which refers to metasurfaces designed to efficiently sense electromagnetic waveforms impinging on them, and perform loca…
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DOA Estimation for Underwater Wideband Weak Targets Based on Coherent Signal Subspace and Compressed Sensing Open
Direction of arrival (DOA) estimation is the basis for underwater target localization and tracking using towed line array sonar devices. A method of DOA estimation for underwater wideband weak targets based on coherent signal subspace (CSS…
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Monopulse Leaky Wave Antennas for RSSI-Based Direction Finding in Wireless Local Area Networks Open
We investigate the use of a single leaky wave antenna (LWA) for amplitude-monopulse direction finding when compared to the more conventional use of two tilted antennas. Thanks to the inherent bidirectional feeding and scanning behavior of …
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Two-Dimensional Direction of Arrival Estimation for Improved Archimedean Spiral Array With MUSIC Algorithm Open
Direction-of-Arrival (DOA) estimation capability of sensor arrays is greatly influenced by geometric configuration of arrays. We proposed a new type 2-D planar array, improved Archimedean spiral array (IASA), to arrange sensor elements and…
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Underwater Localization via Wideband Direction-of-Arrival Estimation Using Acoustic Arrays of Arbitrary Shape Open
Underwater sensing and remote telemetry tasks necessitate the accurate geo-location of sensor data series, which often requires underwater acoustic arrays. These are ensembles of hydrophones that can be jointly operated in order to, e.g., …
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Electrically Large Circular Loops in the Estimation of an Incident Emitter’s Direction-of-Arrival or Polarization Open
Electrically small loops have been the focus of the research literature on loop-antenna signal processing, but such electrically small loop-antennas are electromagnetically inefficient. Electrically large loop-antennas will instead be anal…
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Direction-finding arrays of directional sensors for randomly located sources Open
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Multichannel microwave photonic based direction finding system Open
A new microwave photonic topology for RF signal direction finding is presented. It is based on a dual-parallel Mach Zehnder modulator (DPMZM) in series with an optical phase modulator (PM). The direction of an RF signal received by the ant…
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Ultra-Wideband Angle of Arrival Estimation Based on Angle-Dependent Antenna Transfer Function Open
Ultra-wideband radio signals are used in communication, indoor localization and radar systems, due to the high data rates, the high resilience to fading and the fine temporal resolution that can be achieved with a large bandwidth. This pap…
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Performance-Enhancement of Platform-Based, HF Direction-Finding Systems Using Dynamic Mode Selection Open
We present a method to enhance the accuracy of platform-based, high-frequency (HF) direction-finding (DF) systems using dynamic mode selection. To improve bandwidth and efficiency, the metallic platform supporting the DF array is used as t…
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Phase‐difference measurement‐based angle of arrival estimation using long‐baseline interferometer Open
This article presents a direction‐finding method based on phase difference measurement for wide‐ranging applications of electronic intelligence. By including three processing steps of rotating, re‐scaling, and rounding of phase plane, the …
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Improving Accuracy of an Amplitude Comparison-Based Direction-Finding System by Neural Network Optimization Open
In the positioning and navigation field, it is essential to use the direction-finding system to obtain the signal direction of arrival (DOA) and target position. The amplitude comparison-based monopulse (ACM) DOA algorithm performs a few c…
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Theory of Automatic Dependent Surveillance–Broadcast Position Verification Using Time Difference of Arrival Open
Automatic dependent surveillance-broadcast (ADS-B) is an emerging means of aeronautical surveillance. Because ADS-B is susceptible to false aircraft information, position verification is essential. This article proposes a theoretical perfo…
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Coherent Signal Direction Finding With Sensor Array Based on Back Propagation Neural Network Open
An algorithm based on back propagation neural network and particle swarm optimization is proposed to solve the direction of arrival (DOA) estimation of coherent signals received by the sensor array in colored noise environment. First, a sp…
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Evaluating Cramer-Rao Bound for 2D direction-finding via planar antenna arrays Open
В работе рассматриваются кольцевые, дугообразные и L-образные антенные решетки для задачи радиопеленгации со сверхразрешением стохастическим методом максимального правдоподобия и MUSIC. Вычислены границы Крамера-Рао для различных ситуаций,…
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Calibration Method of Array Errors for Wideband MIMO Imaging Radar Based on Multiple Prominent Targets Open
Wideband multiple-input-multiple-output (MIMO) imaging radar can achieve high-resolution imaging with a specific multi-antenna structure. However, its imaging performance is severely affected by the array errors, including the inter-channe…
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A new direction-of-arrival estimation method using automotive radar sensor arrays Open
This article presents a new signal processing method of estimation of direction of arrival using the phase difference between sensors. The new method is essentially a narrow-band technique for automotive radar. A delay of the reception tim…
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Joint Direction-of-Arrival and Time-of-Arrival Estimation With Ultra-Wideband Elliptical Arrays Open
This paper presents a general technique for the joint
\nDirection-of-Arrival (DoA) and Time-of-Arrival (ToA) estimation
\nin multipath environments. The proposed ultra-wideband
\ntechnique is based on phase-mode expansions and the use of
\…
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ESPRIT-Like Two-Dimensional DOA Estimation for Monostatic MIMO Radar with Electromagnetic Vector Received Sensors under the Condition of Gain and Phase Uncertainties and Mutual Coupling Open
In this paper, we focus on the problem of two-dimensional direction of arrival (2D-DOA) estimation for monostatic MIMO Radar with electromagnetic vector received sensors (MIMO-EMVSs) under the condition of gain and phase uncertainties (GPU…
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A Hybrid AOA and TDOA-Based Localization Method Using Only Two Stations Open
Target localization plays an important role in the application of radar, sonar, and wireless sensor networks. In order to improve the localization performance using only two stations, a hybrid localization method based on angle of arrival …
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Performances Analysis of a System of Localization by Angle of Arrival UWB Radio Open
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Validation of Sensing Ocean Surface Currents Using Multi-Frequency HF Radar Based on a Circular Receiving Array Open
To reduce the floor space of receiving antenna arrays, the Radio Ocean Remote SEnsing (RORSE) laboratory of Wuhan University developed a circular receiving array for a multi-frequency high frequency (MHF) radar system in 2014, consisting o…
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SBL-Based Direction Finding Method with Imperfect Array Open
The imperfect array degrades the direction finding performance. In this paper, we investigate the direction finding problem in uniform linear array (ULA) system with unknown mutual coupling effect between antennas. By exploiting the target…
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Determining Direction‐of‐Arrival Accuracy for Installed Antennas by Postprocessing of Far‐Field Data Open
Direction‐of‐arrival (DoA) estimation accuracy can be degraded due to installation effects, such as platform reflections, diffraction from metal edges, and reflections and refraction in the radome. To analyze these effects, this paper star…
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Performance Analysis of Hyperbolic Multilateration Using Circular Error Probability Open
Precise positioning and tracking capability of any object or radio source has now become a necessity for many industries and a number of sectors like automation, medicine, defence, transport etc. Hyperbolic Multilateration or Time Differen…
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Gridless Sparse Direction Finding Method for Correlated Signals with Gain-Phase Errors Open
In practical array systems, the gain-phase errors among antennas degrade the performance of direction finding significantly. In this paper, a novel sparse system model for direction of arrival (DOA) estimation in the scenario with gain-pha…