摘要
为了克服内调制时伴生调幅现象对相位生成载波解调结果的影响,提出了一种相位生成载波解调改进算法。通过利用干涉信号中的三次谐波分量和基频分量进行解调,有效地消除了伴生调幅对解调结果的影响。改进后的算法减少了一路混频信号的产生,降低了数字解调时占用的内存及系统的采样频率。给出了改进算法的Matlab仿真和CCS硬件仿真实验结果,分析验证了算法的可行性。
An improved phase generated carrier (PGC) demodulation algorithm is proposed to eliminate the effect of companion amplitude modulation in direct frequency modulation. The improved algorithm effectively eliminates the effect of companion amplitude modulation by using the third order harmonic component and the fundamental component. It reduces the generation of one mixing signal, cuts down the memory usage and the sampling frequency in the digital demodulation system. The Matlab simulation and CCS hardware emulation results verify the feasibility of the proposed algorithm.
出处
《激光与光电子学进展》
CSCD
北大核心
2014年第1期76-80,共5页
Laser & Optoelectronics Progress
基金
教育部新世纪优秀人才支持计划(NCET-07-0611)
天津理工大学项目资助(YB11-32,YB11-34)
关键词
光纤光学
直接调制
伴生调幅
相位生成载波
干涉型光纤传感器
fiber optics
direct modulation
companion amplitude modulation
phase generated carrier
interferometric fiber optic sensor