国防科技大学学报2017，Vol.39Issue(5)：38-44,7.DOI:10.11887/j.cn.201705007
利用实时小波降噪的抗电离层闪烁载波跟踪
Carrier tracking in presence of ionosphere scintillation using online wavelet de-noising
摘要
Abstract
Since carrier tracking in presence of ionospheric scintillation is non-stationary,nonlinear and non-Gaussian,the conventional discriminator or Kalman filter-based methods used to enhance the robustness of tracking loops are less effective.A carrier tracking algorithm for scintillation mitigation was proposed based on online wavelet de-noising,which can characterize the non-stationary scintillation signal much better.By designing a sliding window-based online wavelet de-noising filer after the integration of I and Q channels,the non-Gaussian noise caused by scintillation can be filtered effectively.As a result,the effect of ionospheric scintillation on loop discriminator is mitigated,and the accuracy and robustness of the tracking loop is improved.Experimental results prove the validity of the analysis and the proposed carrier tracking algorithm.关键词
电离层闪烁/载波跟踪/实时小波降噪/鉴相误差/失锁概率Key words
ionospheric scintillation/carrier tracking/online wavelet de-noising/discriminator error/probability of loss-of-lock分类
天文与地球科学引用本文复制引用
孙鹏跃,唐小妹,黄仰博,陈华明,孙广富..利用实时小波降噪的抗电离层闪烁载波跟踪[J].国防科技大学学报,2017,39(5):38-44,7.基金项目
国家自然科学基金资助项目(61403413) （61403413）
