舰船地震波环境噪声的统计特性

摘要

研究舰船地震波信号需要首先分析海底地震波的环境噪声特性.海底地震波环境噪声的统计特性研究中,假设其满足广义高斯分布,利用拟合方法对形状参数及尺度参数进行估计,采用χ2检验法进行检验.另外,本文还对地震波信号的平稳随机过程进行了检验.统计结果表明,海底地震波环境噪声近似服从广义高斯分布平稳随机过程的假设检验.结论可以用于舰船地震波信号的降噪方法研究,抑制环境噪声,并为深入研究舰船地震波信号处理方法打下基础.%Statistic characteristic of environment noise of seismic wave in sea floor should be analysed before research of seismic wave for the ship. The statistic characteristic of environment noise of seismic wave is under consideration,we use fitting constants as its shape parameter and scale parameter at first. Then x2 method is used to check if it answer the needs of GGD characteristic. After that estimating stationary random process are also analysed. The result of statistic indicate that seismic data is approximate of Generalized Gaussian Distribution (GGD) characteristic and stationary random process. We can study methods of noise elimination and reduce noise intensity from the result. The conclusion can be also treated as the foundation of signal process for seismic wave in depth.