摘要
讨论双谱的有关概念 ,从理论上证明了双谱可完全消除高斯白噪声或有色噪声 .针对轮式车与履带式车产生的微弱地震动信号 ,进行了双谱分析 ,并与功率谱分析对比 ,发现双谱分析在特征提取方面明显优于功率谱分析 .
The concept of bispectrum is discuss es and it is pointed out that bispectrum can theoretically eliminate Gaussian n oise completely. At the same time with respect to microseismic signal from the w heeled vehicle and tracked vehicle in a distance, this paper compares power spec trum analysis with bispectrum analysis and draws a conclusion that the latter is superior to the other in feature extraction, which actually proves the bispectr um analysis is effective. So this paper gives a suggestion of analyzing microsei smic signal. This method is adapted to sense microsignalsfrom faraway.
出处
《弹道学报》
CSCD
北大核心
2000年第2期26-29,共4页
Journal of Ballistics
关键词
信号处理
特征提取
谱密度
signal processing, feature extraction, power spectru m density
