Evaluation of the influence of directivity factor of directive elements of conformal antenna arrays on the performances of Azimuth-elevation DOA estimation

Nechaev, Yu. B.; Peshkov, I. W.

doi:10.1109/piers.2017.8261791

Cited by 7 publications

(4 citation statements)

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“…In [12], the dependence of antenna element directivity in UCAs was investigated, and it showed the potential 1D (azimuth-only) DoA estimation performance improvement that can be achieved through optimizing the antenna elements. Further studies on non-reconfigurable directive elements have included truncated hexagonal pyramid [7] and cylindrical [13] conformal arrays that are capable of 2D DoA estimation (i.e., azimuth and elevation angles).…”

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%

“…11, this simulation consisted of incident signals coming from all potential (θ, φ) directions with a 1 • resolution and T = 100 trials at each incident angle. Co-polarized incident waves were used for clarity and simplicity as is common in many prior works (e.g., [4], [5], [7], [13], [17], [21]- [26], [29], [33]). The DoA was estimated for each trial, and the overall RMSE across all trials and all incident angles was computed.…”

Section: B Doa Performance With Practical Rpra Elementsmentioning

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.…”

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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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Section: Background and Contributionsmentioning

confidence: 99%