局部已知相位关系的近场测量线性相位恢复
Linear Phase Retrieval for Near-Field Measurements with Locally Known Phase Relations
摘要：
本文提出了一种适用于无相位近场-远场变换的线性凸相位恢复算法。该公式利用本地已知的测量样本集之间的相位关系，这在实践中可以用多通道接收器获得。由于公式的线性，实现了可靠的无相位变换，这完全避免了局部极小值的问题-大多数现有相位恢复技术的致命弱点。此外，所需的测量次数保持接近于完全相干天线测量的测量次数。与现有的方法利用当地的相位关系的比较表明合成数据的准确性和可靠性。
英文摘要：
A linear and thus convex phase retrieval algorithm for the application in phaseless near-field far-field transformations is presented. The formulation exploits locally known phase relations among sets of measurement samples, which can in practice be acquired with multi-channel receivers. Due to the linearity of the formulation, a reliable phaseless transformation is achieved, which completely avoids the problem of local minima - the Achilles heel of most existing phase retrieval techniques. Furthermore, the necessary number of measurements are kept close to that of fully-coherent antenna measurements. Comparisons with an already existing approach exploiting local phase relations demonstrate the accuracy and reliability for synthetic data.
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