摘要
为了解决速度分辨率低的问题,在欠采样条件下,通过跟踪水的动态流速范围,利用设计好的多组抽取带通滤波器,选择和抽取关注的局部频带,然后进行局部的细化和分析,从而大大提高了测速分辨率。事实证明,这种方法具有计算量小且易于实现的特点。
In order to solve the problem of low distinguishability of velocity, the dynamic ranges of current velocity are tracked, and the local bands are selected and extracted to carry out detailed analysis. Thus, the distinguishability of current velocity is greatly improved. The paper gives a specific process of realization.
出处
《微型机与应用》
2010年第9期63-65,68,共4页
Microcomputer & Its Applications
关键词
多普勒频率
欠采样
频带细化技术
测速
Doppler frequency shift
undersamping
ZFPT
current velocity
