A Study of Mode Domain MVDR Algorithm Based on Empirical Mode Decomposition

LI Guan-fang; HUI Jun-ying

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A Study of Mode Domain MVDR Algorithm Based on Empirical Mode Decomposition

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- A Study of Mode Domain MVDR Algorithm Based on Empirical Mode Decomposition
- Acta Electronica Sinica Vol. 37, Issue 5, Pages: 942-946(2009)
- 作者机构：
  
  哈尔滨工程大学水声工程学院,黑龙江,哈尔滨,150001
- 作者简介：
- 基金信息：
- DOI：
  CLC： TP391
- Published：2009
- 稿件说明：
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LI Guan-fang, HUI Jun-ying. A Study of Mode Domain MVDR Algorithm Based on Empirical Mode Decomposition[J]. Acta Electronica Sinica, 2009, 37(5): 942-946.
DOI：

LI Guan-fang, HUI Jun-ying. A Study of Mode Domain MVDR Algorithm Based on Empirical Mode Decomposition[J]. Acta Electronica Sinica, 2009, 37(5): 942-946. DOI：

摘要

矢量阵MVDR波束形成可有效地实现信号的空间谱估计

但它仅适用于窄带信号

当各目标强度相差较大时

难以实现对弱目标的有效检测.经验模态分解具有突出信号局瞬特征的特点

可将多分量信号分解成多阶固有模态函数.结合固有模态函数特性和MVDR窄带信号要求

提出了矢量阵模态域MVDR波束形成算法

并将中心频率的概念应用于固有模态函数

以此作为模态域MVDR波束形成算法的中心频率.海试结果表明:本方法可增强弱目标所在方位空间谱的能量

有效地实现强干扰下弱目标的检测.

Abstract

The vector array MVDR beam forming algorithm only suitable for narrow-band signals can estimate the spatial spectrum effectively

and it was difficult to detect the weak target when targets energy differ in large scale.The empirical mode decomposition (EMD) can emphasize signals’ local characteristic and decompose multicomponent signals into many intrinsic mode functions (IMFs).Combining the IMF characteristic and the MVDR narrow-band signal request

this dissertation proposes the vector array mode domain MVDR beam forming algorithm

and considers the IMF’s center frequency as the center frequency.The sea trial results show this algorithm can enhance the weak signal’s spatial spectrum energy

and realize the weak target’s detection effectively in strong interference.

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