在对调制方法、混频原理、调制深度取值等问题深入研究的基础上, 为得到更高的抗干扰能力, 结合相位生成载波调制解调技术与微分交叉相乘解调算法, 引入除法运算, 提出一种改进的相位生成载波解调算法, 以抑制光强扰动对解调结果的影响, 并与传统的微分交叉相乘解调算法在光源产生低频干扰时的解调效果对比, 进行仿真实验.对比信号源分别为20 Hz与200 Hz时的解调效果, 结果表明,在光源有1 Hz低频扰动的情况下, 在高频信号解调的结果中, 改进的解调算法可以准确地实现对待测信号的解调, 解调结果与传统方法相比具有更高的线性度.

Based on detailed analysis of modulation methods, frequency mixing principle, modulation depth value and so on, in order to get a better ability of anti-interference, combining the phase generated carrier demodulation and modulation technology with the differential and cross multiplying demodulation algorithm, introducing the method of division operation, an improved phase generated carrier demodulation method was proposed in this paper to reduce the effect of light intensity disturbance. Meanwhile, its demodulation results were compared with that of the traditional method and a simulation experiment was carried out. The demodulation results when the frequency of signal source is 20 Hz and 200 Hz were compared, the results indicate that in the condition of light intensity has a 1 Hz low frequency disturbance, the improved demodulation algorithm is much better than the traditional algorithm, especially in linearity and capacity of resisting low frequency disturbance for high frequency demodulation.