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Amplitude-phase discontinuity calibration for phased array radar in varying jamming environment

机译：干扰环境下相控阵雷达幅相不连续性校准

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摘要

The amplitude-and-phase error (APE) between phased array channels is notorious in radar signal processing. This error can cause an inaccurate estimate of unknown steering vector of the target echo signal and eventually result in amplitude-phase discontinuity of the phased array output. Thus, how to handle the APE is a meaningful problem, particularly for the varying jamming environment, of which the signal-to-noise ratio is very low. In this study, the authors have developed a new method to obtain real-time amplitude and phase differences between two consecutive weight update periods based on the accurate estimation of steering vector. Such differences can be used to obtain a real-time weight vector with negligible amplitude-phase distortions, and hence improves the phased array signal-processing performance. The proposed method is very flexible: it works well in different array configurations, such as linear, rectangular and Y-shape arrays, and can be efficiently implemented in any eigenstructure-based direction-of-arrival system.
机译：相控阵通道之间的幅度和相位误差（APE）在雷达信号处理中是众所周知的。此错误可能导致目标回波信号的未知转向矢量的估计不准确，并最终导致相控阵输出的幅度相位不连续。因此，如何处理APE是一个有意义的问题，尤其是对于信噪比非常低的变化的干扰环境。在这项研究中，作者开发了一种新方法，可以基于转向矢量的准确估计来获取两个连续权重更新周期之间的实时幅度和相位差。这样的差异可用于获得幅度相位失真可忽略不计的实时权重矢量，从而提高了相控阵信号处理性能。所提出的方法非常灵活：它在线性，矩形和Y形阵列等不同阵列配置中都能很好地工作，并且可以在任何基于本征结构的到达方向系统中有效地实现。

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