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High resolution direction of arrival estimation methods applied to measurements from a digital array antenna

机译:高分辨率到达方向估计方法应用于数字阵列天线的测量

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At the Defence Research Establishment of Sweden (FOA) an experimental S-band receiving digital array antenna for radar applications has been designed and built. It consists of a horizontal uniform linear array (ULA) of 12 antenna elements, whose digitized signals are processed in non-real time in a computer. Accurate calibration is utilized. We have compared several spectral and parametric direction-of-arrival (DOA) estimation methods for varying DOA separations, number of samples and signal-to-noise ratios (SNR) on measured data from an anechoic chamber. At ideal conditions the resolution can be improved considerably with model based DOA methods compared to conventional beamforming. We achieved a resolution below 1/10 of the resolution of conventional beamforming.
机译:在瑞典国防研究机构(FOA),已经设计并制造了用于雷达应用的实验性S波段接收数字阵列天线。它由12个天线元件的水平均匀线性阵列(ULA)组成,其数字化信号在计算机中非实时处理。利用了准确的校准。我们比较了几种频谱和参数到达方向(DOA)估计方法,这些方法用于根据消声室的测量数据改变DOA间隔,样本数量和信噪比(SNR)。与传统的波束成形相比,在理想条件下,使用基于模型的DOA方法可以显着提高分辨率。我们获得的分辨率低于传统波束成形的分辨率的1/10。

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