Angle of arrival (AoA) estimation by using software defined radios

Tuğrel, Halim Bahadır; Alakoca, Hakan; Kurt, Güneş Karabulut; Ayyıldız, Cem

doi:10.1109/siu.2016.7496018

Cited by 9 publications

(4 citation statements)

References 15 publications

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“…The signal was then filtered using a Gaussian Fourier filter to locate the initial angle calculation using the 𝜃 𝐹𝐹𝑇 equation ( 14). Once the 𝜃 𝐹𝐹𝑇 angle was determined, the 𝜃 𝑠𝑒𝑐𝑡𝑜𝑟𝑎𝑙 value was calculated using equation (22), which reduced the scanning range for the MUSIC algorithm and resulted in a faster calculation time. The results of the experiments conducted in a controlled environment with an average SNR ratio of 10 dB were presented in Table 5.…”

Section: Methodsmentioning

confidence: 99%

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The Angle of Arrival Estimation of Frequency-Hopping Cooperative Object Based on Software-Defined Radio

Rustamaji

Kliwati²,

Widada³

2023

Preprint

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This study aims to investigate and propose a methodology for determining the azimuth angle of cooperative objects with fast processing, more accuracy, and safety. The proposed methodology encompasses the utilization of a transmitter emitting a continuous wave with a hopping frequency, in conjunction with measuring the Angle of Arrival (AOA) between two antennas through the application of interferometry techniques. Furthermore, this study presents an efficient AOA estimation method, which incorporates a sophisticated coarse-to-fine strategy, designed to enhance the processing speed and azimuth angle precision. Additionally, a Fourier bandpass filter is implemented to effectively filter out any signal interference. The Fast Fourier Transform (FFT) algorithm is employed for coarse estimation, whereas the Multiple Signal Classification (MUSIC) algorithms, utilizing coarse angle input and a scan limit of 2.5 degrees, is utilized for fine estimation. The proposed method has been analyzed through modeling and validated through outdoor testing based on Software Defined Radio (SDR), yielding an RMSE of less than 1 degree, utilizing the Blade-RF as the transmitter and the USRP B210 as the receiver.

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Section: Methodsmentioning

confidence: 99%

“…The Root Mean Square Error (RMSE) was utilized as a metric for evaluating the accuracy of the estimated phase and AOA in this study. This was done by comparing the estimated values to the true values using the following equation (22) and analyzing the results for various SNR and angle changes [29], [30].…”

Section: Music Algorithmmentioning

confidence: 99%

The Angle of Arrival Estimation of Frequency-Hopping Cooperative Object Based on Software-Defined Radio

Rustamaji

Kliwati²,

Widada³

2023

Preprint

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“…For example, two USRPs were used to estimate the direction of the signal source in [9][10][11]. e angle estimation error in [9] is about 3 °.…”

Section: Introductionmentioning

confidence: 99%

“…For example, two USRPs were used to estimate the direction of the signal source in [9][10][11]. e angle estimation error in [9] is about 3 °. e system in [10] has an RMS error of 2.14 °and 2.49 °when estimating one source and two sources, respectively.…”

Section: Introductionmentioning

confidence: 99%

Implementation of DOA Estimation System Based on HackRF One

Zhang

Wenju

Huang

et al. 2022

International Journal of Antennas and Propagation

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In the practical direction of arrival (DOA) estimation applications, it is required that the multichannel signal acquisition equipment can synchronously collect the signals received by the array antenna. In addition, the signal phase relationships between channels are supposed to be stable. However, this kind of equipment is usually complex and expensive to manufacture. Since some SDR devices are reconfigurable and open source, this paper adopts HackRF Ones as the signal sampling devices to design the DOA estimation system. The clocks line is used to synchronize the clock frequencies between HackRF Ones. Besides, an external pulse is introduced to control the sampling devices to start sampling simultaneously. In this case, the stable phase difference between channels can be obtained. The experimental results show that the synchronization error between channels of the system is less than one sampling period. The system can be used to estimate the incident angles of single carrier signals or modulated signals. The RMS errors of the system when estimating one source and two sources are 1.94° and 2.85°, respectively.

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The angle of arrival estimation of frequency-hopping cooperative object based on software-defined radio

Rustamaji,

Kliwati,

Widada

2024

Sci Rep

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The primary objective of this research is to propose and examine a technique for accurately determining the azimuth angle of cooperative objects. The proposed methodology aims were to achieve fast processing, increased precision, and enhanced safety. A transmitter emitting a continuous wave with a hopping frequency was utilized in combination with interferometry techniques to measure the angle of arrival (AOA) between two antennas. The efficient method incorporates a coarse-to-fine strategy that improves processing speed and azimuth angle accuracy and to effectively eliminate any signal interference, a Fourier bandpass filter is utilized. The coarse estimation is performed using the fast Fourier transform (FFT) algorithm, while the fine estimation is achieved using the multiple signal classification (MUSIC) algorithm. The fine estimation involves utilizing coarse angle input and a scan limit of 2.5° that is determined from the largest simulated root mean square error (RMSE) value. Modelling and outdoor testing using software defined radio (SDR) have been carried out to assess the proposed methodology. The results from the analysis indicate that the proposed method produces the desired RMSE estimation of less than 1°, thereby validating its accuracy and effectiveness.

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Angle of arrival (AoA) estimation by using software defined radios

Cited by 9 publications

References 15 publications

The Angle of Arrival Estimation of Frequency-Hopping Cooperative Object Based on Software-Defined Radio

The Angle of Arrival Estimation of Frequency-Hopping Cooperative Object Based on Software-Defined Radio

Implementation of DOA Estimation System Based on HackRF One

The angle of arrival estimation of frequency-hopping cooperative object based on software-defined radio

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