摘要
研究了运动声源的信号波形重构问题。采用滑动的线性卷积算法,重构舰船噪声的时域序列,并分析了多普勒效应对运动声源的频谱的影响。计算机仿真结果表明:在高频或者高速的情况下,多普勒现象引起的周期性信号频率偏移较大,重构信号时不能忽略。文中方法考虑了多普勒效应,故重构波形对信号检测方法的研究和应用都具有一定的实用价值。
The signal waveform reconstructing of moving sources is studied in this paper. Based on the convolution algorithm using sliding time--window, the time sequence of a ship--radiated noise can be generated, and the Doppler frequency effect on the received frequency spectrum of moving sources is discussed. Computer simulation results show that in high frequency and in high speed, the frequency of a periodic signal is greatly affected by Doppler phenomenon and the effect can not be ignored. The method proposed in this paper has considered the Doppler effect,so the reconstructing waveform has important significance in the study of the signal detection.
出处
《探测与控制学报》
CSCD
北大核心
2007年第2期67-72,共6页
Journal of Detection & Control
关键词
运动声源
信号波形重构
幅度谱
多普勒频移
moving sources
signal waveform reconstructing
amplitude spectrum
doppler frequency shift
