ARMA模型频率估计方法在轴频提取中的应用  

Application of Frequency Estimation Method Based on ARMA Modeling to Picking up Shaft Frequency

作　　者：尹禄[1] 刘亚杰[1] 姚直象[1] 陈冰[1] 

机构地区：[1]海军工程大学,武汉430033

出　　处：《交通与计算机》2005年第5期111-113,共3页Computer and Communications

摘　　要：轴频提取的前提是对信号频率有较高的估计精度,采用传统的FFT谱估计技术来获得高精度信号频率需要增加计算量;基于自回归-滑动平均ARM A模型的谱估计技术是一种现代高分辨谱估计技术,在小样本、低信噪比状态下具有很好的频率估计性能。文章将这种方法实用于对水下目标辐射噪声谐波频率进行估计,用仿真和实验分析了该方法的性能。To pick up shaft frequency demands a high resolution of estimate signal＇s frequency. Traditional FFT technique consumes more computation load to obtain high resolution. The method based on ARMA modeling is a modern spectral estimation technique with high accuracy, which has good performance in frequency estimation under the condition of short snapshots or low signal-to-noise ratio. In this paper this method is used to estimate the harmonic frequencies radiated from underwater targets. Simulation and experiment results prove the performance of the method.

关 键 词：ARMA模型 频率估计 轴频提取 高分辨谱估计 

分 类 号：TB56[交通运输工程—水声工程]