一种利用均方导数分析混响起伏的方法
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摘要
提出了一种利用均方导数的均方差度量混响起伏的方法,该方法将混响的起伏和发射信号的时宽带宽联系起来,而传统的采用起伏率描述混响起伏的方法只考虑混响统计模型一二阶矩.理论分析表明,对于窄带信号和宽带信号,其混响包络的起伏和发射信号的时宽带宽存在确定的比例关系,对线性调频信号的仿真和试验结果验证了该方法的正确性,通过和传统起伏率的对比,表明了该方法能够更好地反映混响包络起伏特性.
引文
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2GALL J L.Sonar detection in Weibull bottom reverberation.In:IEEE International Conference on Acoustics,Speech,and Signal Processing.New York:IEEE,1985:1293—1296
3Trevorrow M V.Statistics of fluctuations in high-frequency low grazing-angle backscatter from a rocky sea bed.IEEE J Oceanic Eng,2004,29(2):236—245
4Abraham D A,Lyons A P.Novel physical interpretations of K-distributed reverberation.IEEE J Oceanic Eng,2002,27(4):800—813
5Schleher D C.Radar detection in Log-normal clutter.In:IEEE International Radar Conference.New York:IEEE,1975:262—267
6胡文琳,王永良,王首勇.Log-normal分布杂波背景下有序统计恒虚警检测器性能分析.电子与信息学报,2007,29(3):517—520
7赖明,叶天义,李英民.地震动的双重过滤白噪声模型.土木工程学报,1995,28(6):60—66
8陆大金.随机过程及其应用.北京:清华大学出版社,1986.266—274
9奥里雪夫斯基.海洋混响的统计特性.北京:科学出版社,1977.101—197
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