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On Array Calibration Technique for Multipath Reference Waves

机译:多径参考波的阵列校准技术

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摘要

High resolution direction-of-arrival (DOA) estimation algorithm for array antennas becomes popular in these days. However, there are several error factors such as mutual coupling among the elements in actual array. Hence array calibration is indispensable to realize intrinsic performance of the algorithm. In the many applications, it is preferable that the calibration can be done in the practical environment in operation. In such a case, the incident wave becomes coherent multipath wave. Calibration of array in the multipath environment is a hard problem, even when DOA of elementary waves is known. To realize array calibration in the multipath environment will be useful for some applications even if reference signals are required. In this report, we consider property of reference waves in the multipath environment and derive a new calibration technique by using the multipath coherent reference waves. The reference wave depends on not only the DOA but also complex amplitude of each elementary wave. However, the proposed technique depends on the DOA only. This is the main advantage of the technique. Simulation results confirm the effectiveness of the proposed technique.
机译:如今,用于阵列天线的高分辨率到达方向(DOA)估计算法变得很流行。但是,存在一些误差因素,例如实际阵列中元素之间的相互耦合。因此,阵列校准对于实现算法的内在性能必不可少。在许多应用中,优选的是可以在实际操作环境中进行校准。在这种情况下,入射波变为相干多径波。即使已知基本波的DOA,在多径环境中对阵列进行校准也是一个难题。即使在需要参考信号的情况下,在多径环境中实现阵列校准对于某些应用也是有用的。在本报告中,我们考虑了多径环境中参考波的特性,并通过使用多径相干参考波推导了新的校准技术。参考波不仅取决于DOA,而且取决于每个基本波的复振幅。但是,提出的技术仅取决于DOA。这是该技术的主要优点。仿真结果证实了该技术的有效性。

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