Analysis of DOA estimation for directional and isotropic antenna arrays

Sanudin, Rahmat; Noordin, Nurul H.; El-Rayis, Ahmed O.; Haridas, Nakul; Erdogan, A.T.; Arslan, Tughrul

doi:10.1109/lapc.2011.6114043

Cited by 19 publications

(7 citation statements)

References 13 publications

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“…Isotropic antennas are also ideal elements in arrays that are designed for direction of arrival (DoA) estimation [7]. This is because using antennas with nulls in beam pattern can result in an array that is blind to signal sources in the direction of null.…”

Section: Introductionmentioning

confidence: 99%

Design and Development of a Near Isotropic Printed Arc Antenna for Direction of Arrival (DoA) Applications

Ali

Amin

et al. 2021

Electronics

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This research presents an easy to fabricate isotropic printed arc antenna element to be used for direction of arrival (DoA) arrays. The proposed antenna exhibits a total gain variation of 0.5 dB over the entire sphere for 40 MHz impedance bandwidth at 1 GHz, which is the best design isotropy reported in literature so far. In addition, the isotropic bandwidth of the antenna for total gain variation of ≤3 dB is 225 MHz with 86% efficiency. The isotropic wire antenna is first designed and simulated in Numerical Electromagnetic code (NEC). An equivalent printed antenna is then simulated in CST, where single (short circuited) stub is integrated with the antenna for input matching and the results of NEC simulations are verified. The planar antenna is then manufactured using FR4 substrate for measurements. Good agreement between the measured and simulated results is observed, however the total gain variation is increased to 2 dB for the fabricated antenna. This is because of the unavoidable field scattering from the antenna substrate, the feed cables, and the antenna testing platform.

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Section: Introductionmentioning

confidence: 99%

Design and Development of a Near Isotropic Printed Arc Antenna for Direction of Arrival (DoA) Applications

Ali

Amin

et al. 2021

Electronics

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“…Taking use of the radiation characteristics in array processing has been investigated in some literatures [8][9][10]. For the application of DOA estimation, some discussions are also given in [11][12][13][14][15]. However, since the focus of these researches is all on the estimation algorithms, the performance improvement brought by the radiation characteristics is not exploited sufficiently.…”

Section: Introductionmentioning

confidence: 99%

Design methods for ULA‐based directional antenna arrays by shaping the Cramér–Rao bound functions

Chen

Mao

Guo

et al. 2018

IET signal process.

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This study focuses on the design methods for uniform linear array (ULA) based directional antenna arrays by optimising the radiation characteristics of elements. To improve the performance of direction-of-arrival (DOA) estimation in a predetermined objective spatial sector which includes all the potential directions of incidence, Cramér-Rao bound based optimisation models are established by utilising the least squares fitting technique. Besides, a modified simulated annealing (SA) algorithm with the iteration of parameters is proposed, aiming to solve the optimisation problems when the classic SA is invalid. Compared with the corresponding conventional ULA, an optimised array can obtain higher accuracy of DOA estimation in the objective spatial sector with little fluctuation. Additionally, the optimised design of radiation characteristics can also suppress the ambiguities, and remains effective for the arrays with different aperture. Simulation results verify the effectiveness of the proposed methods and the superiority of the optimised arrays.

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“…Target position estimation is an essential part in these applications. There are many target localization methods available, such as direction of arrival (DOA) methods [8, 9], time-delay of arrival (TDOA) methods [10, 11], and energy-based target localization methods [12, 13]. The energy-based target localization method which uses quantized data in WSNs was presented in [12].…”

Section: Introductionmentioning

confidence: 99%

Target Localization in Wireless Sensor Networks for Industrial Control with Selected Sensors

Luo

Min

Liu

2013

International Journal of Distributed Sensor Networks

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This paper presents a novel energy-based target localization method in wireless sensor networks with selected sensors. In this method, sensors use Turbo Product Code (TPC) to transmit decisions to the fusion center. TPC can reduce bit error probability if communication channel errors exist. Moreover, in this method, thresholds for the energy-based target localization are designed using a heuristic method. This design method to find thresholds is suitable for uniformly distributed sensors and normally distributed targets. Furthermore, to save sensor energy, a sensor selection method is also presented. Simulation results showed that if sensors used TPC instead of Hamming code to transmit decisions to the fusion center, localization performance could be improved. Furthermore, the sensor selection method used can substantially reduce energy consumption for our target localization method. At the same time, this target localization method with selected sensors also provides satisfactory localization performance.

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Analysis of DOA estimation for directional and isotropic antenna arrays

Cited by 19 publications

References 13 publications

Design and Development of a Near Isotropic Printed Arc Antenna for Direction of Arrival (DoA) Applications

Design and Development of a Near Isotropic Printed Arc Antenna for Direction of Arrival (DoA) Applications

Design methods for ULA‐based directional antenna arrays by shaping the Cramér–Rao bound functions

Target Localization in Wireless Sensor Networks for Industrial Control with Selected Sensors

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