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针对偏振光谱强度调制(PSIM)系统存在的环境稳定性问题,在PSIM系统实现偏振光谱信息调制解调机理的前期研究基础上,经过严格的理论推导,提出了一套基于傅里叶变换、滤波和傅里叶逆变换等数字信号处理过程的PSIM系统环境稳定性实时自校准算法流程。该算法流程可以从PSIM系统的实测数据中分离出因环境扰动而引入的变化量,实现PSIM系统解调系数自校正,从而有效增强PSIM系统的环境适应能力。
Aiming at the problem of environmental stability of PSIM system, based on the previous research on PSIM system to realize the modulation and demodulation mechanism of polarization spectrum information, a rigorous theoretical derivation is proposed, which is based on Fourier transform and filtering And Fourier transform and other digital signal processing PSIM system environment stability real-time self-calibration algorithm flow. The flow of this algorithm can separate the variation caused by environmental disturbance from the measured data of PSIM system and realize the self-correction of demodulation coefficient of PSIM system, so as to effectively enhance the environmental adaptability of PSIM system.