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一种新97小波消噪法在GPS/INS组合导航中的应用

  • [设施]:长短波
  • [期刊/会议名称]:计量学报
  • [摘要]:In connection with difficulty in establishing accurate mathematical model by extensively applied Extended Kalman Filter (EKF) in data process in GPS/INS Integrated Navigation, 97 lifting wavelet algorithm that using Translation invariant method is applied to reduce noise of observational signal Pseudo Gibbs appearances of signal that are produced in discontinuity points can effectively be eliminated by Translation invariant 97 Lifting wavelet algorithm is more accurate and quicker than traditional Mallat wavelet method Compared with traditional soft and hard threshold functions, the improved threshold function is more continuous in navigation signal process Study shows the improved Wavelet De noising Method is a superior method in saving calculation time and improving Navigation performance. Abstract:针对GPS/INS组合导航中广泛采用的扩展卡尔曼滤波进行数据融合难以建立精确的数学模型问题,提出采用平移不变量的97提升小波算法对观测信号进行降噪.平移不变量可有效地消除信号在不连续点产生的伪吉布斯现象,97提升算法比传统的Mallat小波更具准确性和快速性.与传统的软、硬阈值函数相比,改进的阈值函数对组合导航信号处理具有更好的连续性.研究结果表明,改进的97提升平移小波消噪方法是一种节约计算时间、提高导航性能的优越方法.
  • [发表日期]:2010
  • [第一作者]:马红皎
  • [第一作者单位]:国家授时中心
  • [通讯作者]:马红皎
  • [通讯作者单位]:国家授时中心
  • [论文类型]:期刊论文
  • [期刊分类]:CSCD扩展版
  • [学科分类]:59035 飞行器控制、导航技术
  • [影响因子]:
  • [关键词]:GPS/INS; Metrology; GPS/INS; Lifting wavelet; Translation-invariant; Threshold
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