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首页> 外文期刊>Applied optics >Improved phase generated carrier demodulation algorithm for eliminating light intensity disturbance and phase modulation amplitude variation
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Improved phase generated carrier demodulation algorithm for eliminating light intensity disturbance and phase modulation amplitude variation

机译：消除光强度干扰和相位调制幅度变化的改进相位生成载波解调算法

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摘要

In this paper we propose a novel, improved, phase generated carrier (PGC) demodulation algorithm based on the PGC-differential-cross-multiplying approach (PGC-DCM). The influence of phase modulation amplitude variation and light intensity disturbance (LID) on traditional PGC demodulation algorithms is analyzed theoretically and experimentally. An experimental system for remote no-contact microvibration measurement is set up to confirm the stability of the improved PGC algorithm with LID. In the experiment, when the LID with a frequency of 50 Hz and the depth of 0.3 is applied, the signal-to-noise and distortion ratio (SINAD) of the improved PGC algorithm is 19 dB, higher than the SINAD of the PGC-DCM algorithm, which is 8.7 dB.
机译：在本文中，我们提出了一种基于PGC-差分-交叉-乘积法（PGC-DCM）的新颖，改进的相位生成载波（PGC）解调算法。从理论和实验上分析了调相幅度变化和光强度扰动（LID）对传统PGC解调算法的影响。建立了用于远程无接触微振动测量的实验系统，以确认改进的带有LID的PGC算法的稳定性。在实验中，当应用频率为50 Hz，深度为0.3的LID时，改进的PGC算法的信噪比（SINAD）为19 dB，高于PGC-SINAD的SINAD DCM算法，为8.7 dB。

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