冲击噪声背景下的波达方向估计算法研究
毕业论文关键词 波达方向估计 冲击噪声 MUSIC 算法 ESPRIT 算法
Title Title Title Title Research of DOA estimation inimpulsive noise environmentAbstract Abstract Abstract
Abstract Direction of arrival （ DOA ） estimation is an important research directionin array signal processing field,which is a common problem in manyfields,such as radar,sonar,active protection system,communicationsystem,smart antenna and so on.Conventional DOA estimation algorithms aremainly proposed for the Gaussian noise.But in reality,there is a largenumber of non-gaussian distribution noise,such as atmospheric noise,seaclutter noise,man-made noise,they are impulsive noise.So DOA estimationin the impulsive noise environment becomes the important research topic.The main work of this paper is pided into two parts. Estimation ofthe basic DOA algorithms, analyzes the MUSIC algorithm, ESPRIT algorithmand weighted subspace fitting algorithm principle and algorithm steps .And has carried on simulation of the basic algorithms . According toestimation in impulsive noise by DOA algorithm, mainly studies theprinciple and steps of ROC-ESPRIT algorithm, FLOM-ESPRIT algorithm andINF-ESPRIT algorithm. And simulation experiments, simulation results showthat the performance of DOA estimation algorithm in impulsive noiseenvironment was significantly decreased, ROC-ESPRIT, FLOM-ESPRIT,INF-ESPRIT algorithm can effectively restrain impulsive noise. And threekinds of DOA on the impact noise background estimation algorithm forperformance comparison ， experimental results show that INF-ESPRIT has thebest performance.
Key words DOA Estimation Impulsive Noise MUSIC Algorithm ESPRITAlgorithm
目 次
1 绪论 1
1.1 选题背景和意义 1
1.3 本文安排 2
2 S S α 噪声介绍 4
2. 1 α 稳定分布的定义和性质 4
2. 1.1 α 稳定分布的定义 4
2. 1.2 α 稳定分布的性质 5
2. 2 α 稳定分布的概率密度函数 6
3 基本的 DOA 估计算法 8
3.1 MUSIC 算法 8
3. 1.1 MUSIC 算法的基本原理 8
3. 1.2 MUSIC 算法计算步骤 10
3.1.3 MUSIC 算法仿真分析 10
3.2 ESPRIT 算法 12
3.2.1 ESPRIT 算法的基本原理 1 2
3. 2.2 TLS-ESPRIT 算法计算步骤 1 4
3.2.3 ESPRIT 算法仿真分析 15
3.3 加权子空间拟合算法 16
3.2.1 加权子空间拟合算法的基本原理 16
3. 2.2 加权子空间拟合算法步骤 17
3.4 优缺点比较 18
4 冲击噪声下 DOA 估计算法 18
下一篇：多功能数字图像处理软件实现