Augmented Tensor MUSIC for DOA Estimation Using Nested Acoustic Vector-Sensor Array

Qu, Xinghao; Zhao, Yunjiang; Lu, Yinheng; Qiao, Gang

doi:10.1109/lsp.2022.3191254

Cited by 8 publications

(2 citation statements)

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“…To extend the array aperture to be much higher than a half-wavelength with a limited number of sensors, vector sensors are widely used in sensing systems [15][16][17][18][19][20][21][22][23]. This is because a complete acoustic vector sensor (AVS) consists of four components, three orthogonal velocity sensors and another pressure sensor, co-located in space.…”

Section: Introductionmentioning

confidence: 99%

“…To extend the array aperture, the sensor/element-spacing of methods in [17][18][19][20] can be intentionally extended to be much higher than a half-wavelength and hence would provide an enhanced spatial resolution. To increase the achievable DOF, the idea of associating electromagnetic vector sensors and acoustic vector sensors with nested arrays were proposed in [22,23]. However, they were confined to the usage of a linear array configuration.…”

Section: Introductionmentioning

confidence: 99%

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Hybrid T-Shaped Sensor Array Composed of Acoustic Vector Sensors and Scalar Sensors

Rao

2023

Electronics

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Through the more available acoustic information or the polarization information provided, vector sensor arrays outperform the scalar sensor arrays in accuracy of localization. However, the cost of a vector sensor array is higher than that of a scalar sensor array. To reduce the cost of a two-dimensional (2-D) vector sensor array, a hybrid T-shaped sensor array consisting of two orthogonal uniform linear arrays (ULAs) is proposed, where one ULA is composed of acoustic vector sensors and the other is composed of scalar sensors. By utilizing the cross-correlation tensor between the received signals from the two ULAs, two virtual uniform rectangular arrays (URAs) of acoustic vector sensors are obtained, and they can be combined into a larger URA. It is shown that a larger acoustic vector sensor URA with M2+1 degrees of freedom (DOFs) can be obtained from the specially designed T-shaped array with M acoustic vector sensors and 2M scalar sensors. Furthermore, by means of the proposed tensor model for the larger URA, the inter-sensor spacing can be allowed to exceed greatly a half-wavelength. Accordingly, the proposed method can achieve both a high DOF and a large array aperture. Simulation results show that the proposed method has a better performance in 2-D direction-of-arrival estimation than some existing methods under the same array cost.

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