α稳定分布的水声信号处理新方法  

A New Underwater Acoustic Signals Processing Approach to a-Stable Distribution

作　　者：张安清[1] 邱天爽[1] 章新华[2] 

机构地区：[1]大连理工大学电子与信息工程学院,大连116024 [2]海军大连舰艇学院信息工程系,大连116018

出　　处：《电子与信息学报》2005年第8期1201-1204,共4页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(60172072;60372081)资助课题

摘　　要：本文依据分数低阶统计信号处理理论和舰船辐射噪声信号特性,提出了水声信号新的噪声模型,分析了常规LMS滤波方法在非高斯α稳定分布噪声下性能退化的原因,提出了基于分数低阶p-范数的LMP,NLMP水声信号自适应降噪滤波方法,并分析了参数p值的选取对LMP滤波效果的影响。理论分析和计算机仿真结果表明这种方法在高斯和非高斯α稳定分布条件下都具有良好的鲁棒性。According to the theory of the fractional lower order statistical signal processing and the characteristics of ship radiated noises, this paper proposes a new noise model of underwater acoustic signals. The reasons of performance degenerate are analyzed for traditional LMS approach. A new replace approach is advanced to adaptive filtering based on fractional lower order moments for underwater acoustic signals. It is analyzed how to affect the performance of LMP algorithm for choosing p value. Theoretic analysis and computer simulations indicate that the new method is not only suitable for Gaussian noise conditions, but also very robust under the lower order α -stable distribution noise conditions.

关 键 词：分数低阶统计量 Α稳定分布 舰船辐射噪声 水声信号 检测 

分 类 号：TN911.7[电子电信—通信与信息系统]