On the use of reconfigurable antenna arrays for DoA estimation of correlated signals

Kaderli, Emrah; Bahçeci, İsrafil; Kaplan, Kathleen; Cetiner, Bedri A.

doi:10.1109/radar.2016.7485112

Cited by 10 publications

(10 citation statements)

References 14 publications

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“…For comparison, Fig. 6 shows the MUSIC overall RMSE from (17), which is qualitatively similar to √ C θθ in Fig. 5(a).…”

Section: B Rpra Optimizationmentioning

confidence: 59%

“…In this work, a computationally efficient iterative mode selection technique was used to select between 25 different element states, which showed improved DoA performance compared to a UCA composed of dipole elements. A similar approach was also used in an earlier work [17] where a planar rectangular array was studied using parasitic layer reconfigurable antenna elements that focused on a spatial smoothing technique to improve DoA performance. These papers did not explore the impact of element directivity on 2D DoA estimation performance.…”

Section: Background and Contributionsmentioning

confidence: 99%

“…Depending on the switch implementation, there could be little to no added power consumption with the use of this RPRA (e.g., if RF MEMS switches were used). Circular polarization could be beneficial for many applications, but linear polarization will be used here for demonstration, similar to the 2D DoA estimation in [7], [13], [17], [33].…”

Section: A Rpra Design and Simulationmentioning

confidence: 99%

“…The multiple signal classification (MUSIC) algorithm [34] is a commonly-used method to estimate the DoA in adaptive arrays (e.g., it was used to evaluate performance in [7], [10], [13], [14], [17], [21], [25]- [27]). The MUSIC algorithm, which is based on the eigenvalue decomposition of the array covariance matrix, is also the method that was used to evaluate and compare DoA estimation performance in this work.…”

mentioning

confidence: 99%

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2D Direction of Arrival Estimation Using Uniform Circular Arrays With Radiation Pattern Reconfigurable Antennas

Jackson

2022

IEEE Access

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This paper focuses on direction of arrival (DoA) estimation using adaptive arrays that consist of radiation pattern reconfigurable antenna (RPRA) elements for 2D direction finding (i.e., azimuth and elevation DoA estimation). In particular, uniform circular arrays (UCAs) are explored that use RPRA elements with two different elevation radiation pattern states to achieve unambiguous estimates over all possible incident angles. Theoretical cardioid-type directional patterns are investigated to determine the pattern states that minimize overall DoA estimation error, and the performance of 3-, 4-, and 5-element RPRA UCAs is compared with baseline theoretical arrays composed of isotropic elements. The results demonstrate that RPRA UCAs with optimized cardioid patterns can achieve similar accuracy to the baseline arrays, but with fewer antennas/front-ends. For example, a 4-element RPRA UCA can achieve approximately the same root mean square error (RMSE) as a 6-element uniform spherical array composed of isotropic elements. Furthermore, unambiguous estimates can be achieved over all incident angles with electrically large UCA radii using optimized RPRA elements, which can further improve accuracy and increase bandwidth. To demonstrate the feasibility of the technique, a practical RPRA was designed at 6 GHz with a pattern that approximates the optimized cardioid, and the performance meets or exceeds the theoretical pattern performance for RMSEs less than 3 • .

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“…For comparison, Fig. 6 shows the MUSIC overall RMSE from (17), which is qualitatively similar to √ C θθ in Fig. 5(a).…”

Section: B Rpra Optimizationmentioning

confidence: 59%

Section: Background and Contributionsmentioning

confidence: 99%

Section: A Rpra Design and Simulationmentioning

confidence: 99%

mentioning

confidence: 99%

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2D Direction of Arrival Estimation Using Uniform Circular Arrays With Radiation Pattern Reconfigurable Antennas

Jackson

2022

IEEE Access

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“…If the design of antenna hardware is included in the approach, then the added degrees of freedom can yield a much more efficient solution. Specifically, reconfigurable antennas have been highlighted for their use in direction of arrival (DoA) estimation [4], [5], and [6]. DoA estimation can identify spoofed signals, which typically emanate from directions other than their advertised locations in the navigation message.…”

Section: Introductionmentioning

confidence: 99%

A Single Hemispiral Antenna for GNSS Interference Mitigation and Direction Estimation

Kataria

Bernhard²,

Gao³

2017

Proceedings of the 30th International Technical Meeting of the Satellite Division of the Institute of Navigation (ION GNSS+ 201

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This work presents a single-feed hemispiral antenna that leverages both hardware and software approaches to mitigate interference from jammers, spoofers, and unintended RF interference. The operation frequency range encompasses most known GNSS bands, but characterization specifically targets the L1, L2, and L5 bands for GPS. The diversity in the hemispiral's radiation pattern enables the receiver to perform DoA checks on incoming narrowband signals, distinguish between data from true satellites versus spoofers, and identify potential multipath signals. This added functionality can be implemented in parallel to a receiver's regular processing for satellite acquisition and tracking.

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Performance Analysis of Uniform Concentric Circular Antenna Array Beamformer Using Different DOA Estimation Technique

Sarkar

Reza

2018

2018 4th International Conference on Electrical Engineering and Information &Amp; Communication Technology (iCEEiCT)

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On the use of reconfigurable antenna arrays for DoA estimation of correlated signals

Cited by 10 publications

References 14 publications

2D Direction of Arrival Estimation Using Uniform Circular Arrays With Radiation Pattern Reconfigurable Antennas

2D Direction of Arrival Estimation Using Uniform Circular Arrays With Radiation Pattern Reconfigurable Antennas

A Single Hemispiral Antenna for GNSS Interference Mitigation and Direction Estimation

Performance Analysis of Uniform Concentric Circular Antenna Array Beamformer Using Different DOA Estimation Technique

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