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数字化相位生成载波(PGC)方法是实现光纤干涉仪大动态范围、高精度信号检测的主要手段。为了实现一个实用系统,必须对该方法的各种参数进行深入研究。以非平衡干涉仪为基础,推导了数据采集单元和相位生成载波方法相关参数及待测信号参数之间的关系,提出了抗混叠滤波器的设计方法,给出了实验结果,实现了高精度相位生成载波数字解调系统的设计。
The digital phase-generated carrier (PGC) method is the main means to realize large dynamic range and high-precision signal detection of optical fiber interferometer. In order to implement a practical system, various parameters of the method must be studied in depth. Based on the unbalanced interferometer, the relationship between the parameters of the data acquisition unit and the phase-generated carrier method and the parameters of the signal to be measured is deduced. The design method of the anti-aliasing filter is proposed, the experimental results are given, Design of Digital Phase Modulation System for Carrier Phase Generation.