| 频谱带宽和功率可变多普勒信号的计算机模拟 |
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| 引用本文： | 汪源源,FISH Peter J..频谱带宽和功率可变多普勒信号的计算机模拟[J].声学技术,1997,16(4):177-179. |
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| 作者姓名： | 汪源源 FISH Peter J. |
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| 作者单位： | 复旦大学电子工程系 |
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| 摘 要： | 计算机模拟的多普勒信号，可以为各种多普勒信号处理方法的研究提供信号源，从而了解各种不同处理方法的性能。本文提出的方法，运用白噪声通过一时变滤波器的原理，模拟产生平均频率，带宽和功能均随时间变化的多普勒信号。
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| 关 键 词： | 医学超声 超声多普勒技术 频谱带宽 计算机模拟 |
| 收稿时间： | 1996/12/5 0:00:00 |
| 修稿时间： | 1997/3/10 0:00:00 |
Computer simulation of Doppler signal with time-varying bandwidty and power |
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| WANG Yuanyuan and FISH Peter J..Computer simulation of Doppler signal with time-varying bandwidty and power[J].Technical Acoustics,1997,16(4):177-179. |
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| Authors: | WANG Yuanyuan and FISH Peter J |
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| Affiliation: | Department of Electronic Engineering, Fudan University, Shanghai 200433;School of Electronic Engineering Sciences, University of Wales, Bangor, UK |
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| Abstract: | Computer simulated Doppler signals can be used as the signal source in the research of Doppler signal processing techniques, which can make it possible to compare the perfomance of various signal processing methods. The method described in this paper, based on the application of white noise to a filter with a time-varying impulse response, can be used to generate Doppler signals with time-varying mean frequency, bandwidth and signal power. Results of analysing Doppler signals simulated using this method with the short time Fourier transform show agreement with the theoretical prediction. |
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