| 黄雄飞,苑秉成,陈喜.宽带多普勒声纳信号频谱特性分析[J].,2009,28(4):278-282 |
| 宽带多普勒声纳信号频谱特性分析 |
| Spectrum characteristics of signal in broad-band doppler sonar |
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| 中文摘要: |
| 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。 |
| 英文摘要: |
| 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. |
| DOI：10.11684/j.issn.1000-310X.2009.04.008 |
| 中文关键词: 声学 多普勒 宽带 频谱特性 测速模糊 |
| 英文关键词: Acoustic Doppler Broad-band Spectrum characteristics Velocity ambiguity |
| 基金项目: |
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