| 宽带多普勒声纳信号频谱特性分析 |
| |
| 引用本文： | 黄雄飞,苑秉成,陈喜.宽带多普勒声纳信号频谱特性分析[J].应用声学,2009,28(4):278-282. |
| |
| 作者姓名： | 黄雄飞 苑秉成 陈喜 |
| |
| 作者单位： | 海军工程大学兵器工程系,武汉,430033 |
| |
| 摘 要： | 宽带多普勒声纳采用重复相位编码技术和脉冲-脉冲相关技术,解决了窄带技术存在的距离分辨力和速度分辨力的矛盾。本文主要研究了重复相位编码信号的频谱特性,并与矩形正弦填充脉冲的频谱进行比较,同时研究了回波信号的频谱特性,推导出频域上的测速公式,并根据回波的频谱特性分析了宽带多普勒声纳产生测速模糊的原因,并提出一种解决测速模糊的方法。
|
| 关 键 词： | 声学 多普勒 宽带 频谱特性 测速模糊 |
Spectrum characteristics of signal in broad-band doppler sonar |
| |
| HUANG Xiong-Fei,YUAN Bing-Cheng and CHEN Xi.Spectrum characteristics of signal in broad-band doppler sonar[J].Applied Acoustics,2009,28(4):278-282. |
| |
| Authors: | HUANG Xiong-Fei YUAN Bing-Cheng and CHEN Xi |
| |
| Institution: | HUANG Xiong-Fei YUAN Bing-Cheng CHEN Xi (Department of Weaponry Engineering,Naval University of Engineering,Wuhan 430033) |
| |
| Abstract: | Broad-band Doppler sonar adopts repeated-sequence pseudo-random codes for transmiting signal and applies the pulse-to-pulse coherent technology to improve both distance resolution and speed resolution.This paper studies the spectrum characteristics of the generated signal and compares the results between the repeated-sequence pseudo-random codes and the CW signal.At the same time,the spectrum characteristics of the backscattered signal is studied.The formula for measuring velocity in the frequency domain is induced.The reason of velocity-ambiguity is analysed according to the backscattered signal spectrum characteristics. At last,a method of resolving velocity-ambiguity is proposed. |
| |
| Keywords: | Acoustic Doppler Broad-band Spectrum characteristics Velocity ambiguity |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《应用声学》浏览原始摘要信息 |
| 点击此处可从《应用声学》下载免费的PDF全文 |
|
