基于分数低阶矩的水声信号滤波新方法  

New Method Based on Fractional Lower-Order Statistics of Filter for Underwater Acoustic Signals

作　　者：张安清[1] 康春玉[1] 许林周[1] 

机构地区：[1]海军大连舰艇学院,辽宁大连116018

出　　处：《火力与指挥控制》2004年第5期15-17,共3页Fire Control & Command Control

基　　金：国家自然科学基金资助项目(60072049);海军大连舰艇学院科研发展基金资助项目(FZ0301806)

摘　　要：依据分数低阶统计量理论和舰船辐射噪声信号特性,建立了水声信号新的噪声模型,回顾了常规LMS滤波方法,并分析在非高斯噪声下性能退化的原因,提出了一簇基于分数低阶P-范数的LMP水声信号自适应降噪滤波新方法,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韧性。According to the theory of the fractional lower order statistics and the characteristics of ship radiate noises,this paper proposed a new noise model of underwater acoustic signals,recalled general LMS metnod,analyzed performance degradation reason for non-gaussian noise model,and presented the fractional lower order lp-norm based approaches of adaptivef filter for underwater acoustic signals.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]