This paper investigates the direction of arrival (DOA) estimation performance in the presence of polarity inconsistency in uniform acoustic vector sensor (AVS) linear array. We analyze the influence of polarity bias on beampattern directivity of the AVS array. The analysis results show that the polarity bias leads to asymptotically biased estimation. Then, the analytical expression for the asymptotic bias based on classical beamforming is derived in the presence of polarity error. Moreover, to improve the DOA estimation performance in the presence of polarity inconsistency, a polarity calibration method is proposed. Numerical simulations reveal the effectiveness and superiority of the proposed calibration method when the polarity error satisfies with the uniform distribution and the normal distribution.

中文翻译：

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存在极性不一致时声矢量传感器阵列的性能分析及DOA估计方法

本文研究了在均匀声矢量传感器 (AVS) 线性阵列中存在极性不一致的情况下的到达方向 (DOA) 估计性能。我们分析了极性偏置对 AVS 阵列波束方向性的影响。分析结果表明，极性偏差导致渐近偏差估计。然后，在存在极性误差的情况下，推导出基于经典波束成形的渐近偏差的解析表达式。此外，为了在存在极性不一致的情况下提高 DOA 估计性能，提出了一种极性校准方法。当极性误差满足均匀分布和正态分布时，数值模拟揭示了所提出的校准方法的有效性和优越性。