| 谭子龙,王雪梅,许哲,官章健.基于匹配追踪算法的激波信号特征提取[J].,2014,33(6):547-553 |
| 基于匹配追踪算法的激波信号特征提取 |
| Feature extraction from the Shockwave signals based on the matching pursuits algorithm |
| 投稿时间：2014-01-13 修订日期：2014-10-18 |
| 中文摘要: |
| 针对时域重叠、噪声混合等情况下从多弹头激波信号中提取时延特征参数问题，利用匹配追踪（Matching Pursuits , MP）算法的自适应分解特性对激波混合信号进行特征提取，并针对运行时间长和内存占用大等问题提出“粗提取-精提取”两步改进算法，通过“粗提取”获得各个激波信号的长度，触发位置等先验知识，利用“分库”、“总库”思想重构过完备原子库进行精提取。仿真结果表明，该改进算法不仅能以较高精度提取时延特征参数，而且能有效提高提取速度和减小内存占用。 |
| 英文摘要: |
| Considering the problem of extracting time-delay feature parameters from multi-warhead shockwave signals in the situation of time-domain overlapping and mixed noise, the adaptive decomposition characteristics of matching pursuits (MP) were used to extract feature from shockwave signals and a two-step improved algorithm used in wide-extraction-precise-extraction was put forward to improve the extraction speed and reduce the memory cost. The length and trigger position of each shockwave was obtained by wide extraction for reconstructing over-complete atom dictionary in next precise extraction based on the part-dictionary and the whole-dictionary. The simulation indicated that the improved algorithm can not only extract time-delay feature parameters at a relatively high precision but also improve the extraction speed and reduce the memory cost effectively. |
| DOI：10.11684/j.issn.1000-310X.2014.06.013 |
| 中文关键词: 激波信号，匹配追踪，过完备原子库 |
| 英文关键词: shockwave signal, matching pursuits, over-complete atom dictionary |
| 基金项目: |
|
| 摘要点击次数: 2070 |
| 全文下载次数: 1857 |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
