| 畅楠琪,黄晓砥,王海斌.光纤水听器相位生成载波解调非线性因素 的抑制方法*[J].,2023,42(4):804-813 |
| 光纤水听器相位生成载波解调非线性因素 的抑制方法* |
| Nonlinear factors suppression method of phase generated carrier demodulation of optical fiber hydrophone |
| 投稿时间：2022-03-19 修订日期：2023-07-02 |
| 中文摘要: |
| 为了消除非线性因素对PGC解调结果的干扰,降低PGC解调过程中低通滤波器的频响特性对PGC解调结果的影响,本文提出了一种基于扩展卡尔曼滤波(extended Kalman filter, EKF)椭圆参数估计的PGC微分交叉相乘(Differential-and-cross-multiplying, DCM)解调方法(PGC-DCM demodulation method based on extended Kalman filter elliptic parameter estimation, EKF-DCM)。该方法在综合考虑各种非线性因素对PGC-DCM解调结果的影响的基础上,对传统的PGC-DCM解调过程进行了改进。经过计算机仿真和实验验证,本文所提出的EKF-DCM方法能够有效的抑制非线性因素对PGC解调结果的干扰,其信噪比、总谐波失真和信噪谐波比性能相比传统的PGC反正切方法和PGC-DCM方法有了明显的提升,且EKF-DCM方法受解调过程中低通滤波器频响特性的影响较小。 |
| 英文摘要: |
| In order to eliminate the interference of nonlinear factors on PGC demodulation results and reduce the influence of the frequency response characteristics of low-pass filter on PGC demodulation results in the process of PGC demodulation, this paper proposes a PGC differential and cross multiplying (DCM) demodulation method based on extended Kalman filter (EKF) elliptic parameter estimation (EKF-DCM). This method modifies the traditional PGC-DCM demodulation process, and uses the EKF based elliptic parameter estimation method to estimate the model parameters in the improved PGC-DCM demodulation process. Through computer simulation and experimental verification, the EKF-DCM method proposed in this paper can effectively suppress the interference of nonlinear factors on PGC demodulation results. Its signal-to-noise ratio, total harmonic distortion and signal-to-noise harmonic ratio performance are significantly improved compared with the traditional PGC arctangent method and PGC-DCM method, and EKF-DCM method is less affected by the frequency response characteristics of low-pass filter in the demodulation process. |
| DOI：10.11684/j.issn.1000-310X.2023.04.016 |
| 中文关键词: 光纤水听器 相位生成载波 扩展卡尔曼滤波 椭圆参数估计 微分交叉相乘法 |
| 英文关键词: fiber-optic hydrophone phase generated carrier extended Kalman filter ellipse parameters estimation differential and cross multiplying |
| 基金项目:(62171440),国家自然科学基金项目（面上项目，重点项目，重大项目） |
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