基于部分校准极化敏感阵列的信号DOA和极化参数迭代估计
doi: 10.3724/SP.J.1146.2007.00955
The Iterated Estimation of DOA and Polarization Based on Partly Calibrated Polarization Sensitive Array
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摘要: 针对安装于飞机机翼上，具有不同结构极化敏感天线的部分校准阵列，该文提出了一种完全极化电磁波DOA和极化参数的迭代估计方法。该方法基于部分校准阵列，估计阵列误差；然后利用阵列误差，估计单个极化敏感天线的极化导向矢量；最后利用极化导向矢量，估计完全极化电磁波DOA和极化参数。迭代运行上述三步，可以逐步提高估计精度。计算机仿真验证了该方法是收敛的，并且具有良好的鲁棒性。Abstract: The iterated estimation of DOA and polarization for completely polarized electromagnetic waves is proposed based on an partly calibrated polarization sensitive array with different type of polarization sensitive antennas, mounted on airframe. The proposed algorithm can estimate the arrays error based on the partly calibrated polarization. Then, the polarization steering vector of single polarization sensitive antenna is estimated by this arrays error, so that the sources DOA and polarization are estimated based on the polarization steering vector. The estimating accuracy is enhanced by means of iteration. The simulations show that the proposed algorithm has convergence and robust character.
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