| 朱安珏.水中目标辐射噪声特性仿真[J].声学技术,2004,(2):128~131 |
| 水中目标辐射噪声特性仿真 |
| Simulation of radiation noise from underwater targets |
| 投稿时间：2003-05-15 修订日期：2003-10-14 |
| DOI： |
| 中文关键词: 船体辐射噪声 线谱 直接数字信号合成 |
| 英文关键词: radiation noise of ship line spectrum Direct Digital Synthesis |
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| 中文摘要: |
| 文章中讨论了水中目标—船体辐射噪声的特性。运用冲激响应不变法来设计IIR数字一阶低通滤波器,并用此滤波器对高斯白噪声进行滤波,滤波器的输出能很好地模拟船体辐射宽带连续噪声,此输出信号的功率谱在高频端以6dB/oct的斜率下降。运用直接数字信号合成技术产生多个低频线谱信号,并将它与宽带连续噪声相加,从而来模拟船体辐射的低频线谱。 |
| 英文摘要: |
| Characteristics of radiation noise from underwater targets are studied in this paper. An IIR lowpass digital filter designed using the impulse response invariability method is employed to remove white Gaussian noise. The filter output is a good simulation of the radiation noise from a naval ship, and its spectrum has a 6dB/oct slope at higher frequencies. The low frequency line spectra are created with the Direct Digital Synthesis(DDS) method. |
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