摘要
宽带声学多普勒海流剖面仪采用重复相位编码信号和复协方差方法进行频移量的估计。具有较高的测速精度,但是在测速上具有速度模糊,在不改变原有的系统结构的基础上对宽带多普勒海流剖面仪的信号处理方法进行改进,提出采用回波自相关的第一个旁瓣的位置解决测速模糊的方法,并推导了计算公式,最后进行了数字计算和仿真,结果证明了这种方法的正确性和可行性。
Broad-band Acoustic Doppler current profiler （BBADCP） has been used widely in our country, BBADCP adopts phase-coded signal and estimates the Doppler frequency with covariance technology to make it having very high precision but accompanying velocity ambiguity in current velocity measurement. In this paper the method of signal processing is improved without changing the system structure, and the problem of velocity ambiguity is solved by using the location of the first side-lobe of signal＇s auto-corre- lation. The computational formula is induced, and typical computation and simulation is done. The results prove the validity and feasibility of the solution.
出处
《声学技术》
CSCD
北大核心
2008年第3期323-327,共5页
Technical Acoustics
关键词
声学
海流剖面仪
相位编码
速度模糊
acoustic
current profile
phase-coded
confused velocity
