激光与光电子学进展, 2014, 51 (1): 010605, 网络出版: 2013-12-26
一种消除伴生调幅影响的PGC解调方法 下载: 535次
Phase Generated Carrier Demodulation Algorithm for Eliminating Companion Amplitude Modulation
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
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。
Abstract
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.
王燕, 王恺晗, 郝彬, 张爱玲. 一种消除伴生调幅影响的PGC解调方法[J]. 激光与光电子学进展, 2014, 51(1): 010605. Wang Yan, Wang Kaihan, Hao Bin, Zhang Ailing. Phase Generated Carrier Demodulation Algorithm for Eliminating Companion Amplitude Modulation[J]. Laser & Optoelectronics Progress, 2014, 51(1): 010605.