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首页> 外文期刊>Review of Scientific Instruments >Effect of linear drifts and low‐frequency noise in phase shift measurements
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Effect of linear drifts and low‐frequency noise in phase shift measurements

机译:线性漂移和低频噪声在相移测量中的影响

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The presence of slowly varying signal drifts or low frequency (subharmonic) contributions can produce significant errors in the calculation of phase shifts using a correlation analysis. Under these conditions, the phase shift calculation becomes dependent on the reference signal phase angle. In this paper, we propose a modification to the correlation analysis to remove this dependency. We also present our analysis in discrete form to enable a digital implementation. Finally, we discuss the adverse effects that changes in the limits of integration can have on the phase shift calculation under the presence of linear signal drifts.
机译:缓慢变化的信号漂移或低频(次谐波)影响的存在会在使用相关分析计算相移时产生重大误差。在这些条件下,相移计算将取决于参考信号的相位角。在本文中,我们提出了对相关性分析的修改,以消除这种依赖性。我们还以离散形式展示了我们的分析结果,以实现数字化实施。最后,我们讨论了在存在线性信号漂移的情况下积分极限变化可能对相移计算产生的不利影响。

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