【作者】 徐丽亚； 杨坤德； 雷志雄；

【Author】 XU Li-ya;YANG Kun-de;LEI Zhi-xiong;School of Marine Science and Technology, Northwestern Polytechnical University;

【机构】 西北工业大学航海学院；

【摘要】 对深海海底混响的瞬时值、相位和包络的概率密度函数进行分析,研究了海底混响服从的概率密度分布的判断方法。利用实测数据,通过偏度和峰度估计判断海底混响的瞬时值是否服从高斯分布。深海海底混响的相位仍服从均匀分布。针对典型的瑞利分布、对数正态分布、K分布和Weibull分布四种混响包络模型,进行相关参数估计,绘制概率密度函数曲线,与实测数据相比较,进行拟合优度检验,利用检验概率值判断该海底混响包络服从的分布。更多还原

【Abstract】 The probability density function(PDF) of bottom reverberation in deep ocean is studied in this paper,and one method how to obtain the PDF of instantaneous value, phase and envelope is discussed. By estimating the skewness and kurtosis, it can be judged whether the instantaneous value obeys a Gaussian distribution. The phase of bottom reverberation conforms to a uniform distribution. The typical models of the envelope contain the Rayleigh distribution, log-normal distribution, K distribution and Weibull distribution. The relevant parameters are estimated to get the PDF curves. Compared with the measured data, the distribution of the envelope is demonstrated by the test probability value.更多还原