Improved phase generated carrier demodulation algorithm for eliminating light intensity disturbance and phase modulation amplitude variation.
Improved phase generated carrier demodulation algorithm for eliminating light intensity disturbance and phase modulation amplitude variation.
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DOI：
10.1364/ao.51.006962
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发表时间：
2012-10
期刊：
影响因子：
1.9
通讯作者：
You-wan Tong;Hualin Zeng;Li-yan Li-Li-yan-Li-2107939501;Yan Zhou
中科院分区：
文献类型：
--
作者：
You-wan Tong;Hualin Zeng;Li-yan Li-Li-yan-Li-2107939501;Yan Zhou
本文提出了一种基于相位生成载波差分交叉乘法（PGC-DCM）的相位生成载波（PGC）解调算法。从理论和实验上分析了相位调制幅度变化和光强扰动对传统PGC解调算法的影响。建立了远程非接触微振动测量实验系统，验证了LID改进PGC算法的稳定性。在实验中，当LID频率为50 Hz，深度为0.3时，改进PGC算法的信噪比（SINAD）为19 dB，高于PGC-DCM算法的8.7 dB。
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.