A Robust Beamforming Algorithm Based on Non-Uniform Generalized Diagonal Loading Method

doi:10.7652/xjtuxb201608011

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A Robust Beamforming Algorithm Based on Non-Uniform Generalized Diagonal Loading Method

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- A Robust Beamforming Algorithm Based on Non-Uniform Generalized Diagonal Loading Method
- Vol. 50, Issue 8, Pages: 64-69(2016)
- 作者机构：
  
  空军工程大学信息与导航学院,西安,710077
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201608011
  CLC： TN911.7
- Online First：10 August 2016，
  
  Published：2016
- 稿件说明：
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A Robust Beamforming Algorithm Based on Non-Uniform Generalized Diagonal Loading Method[J]. 2016, 50(8): 64-69.
DOI：

A Robust Beamforming Algorithm Based on Non-Uniform Generalized Diagonal Loading Method[J]. 2016, 50(8): 64-69. DOI： 10.7652/xjtuxb201608011.

摘要

为解决阵列天线在信号接收过程中利用一般对角加载算法在抑制噪声影响的同时降低干噪比、使零陷变浅的问题

提出了一种非均匀广义对角加载稳健波束形成算法。该算法首先根据接收数据协方差矩阵的特征值

对不同的信号自适应地选择不同加载因子

并利用选择的加载因子通过矩阵重构构造广义对角加载矩阵对接收数据进行加载处理

最后通过Capon算法得到波束形成向量。仿真结果表明:该算法在消除噪声影响的同时

可以有效展宽零陷并使零陷深度达到-50 dB

而且通过非均匀加载降低输入信号的信噪比

在期望信号波达方向误差为2°时

比一般对角加载算法输出信号的干噪比高10 dB

具有较好的稳健性。

Abstract

A new non-uniform diagonal loading beamforming algorithm is proposed to solve the problem that the general diagonal loading method

which is utilized in array antenna receiving signal process to suppress the influence of noise

loads all kinds of signals with the same loading factor and shallows the null. The proposed method chooses different loading factors for different signals according to eigenvalues of the received signal covariance matrix

and then a generalized loading matrix with the selected loading factors is reconstructed to deal with the received signal. The beamforming vector is finally obtained through the Capon algorithm. Simulation results show that the proposed algorithm eliminates the influence of noise and broaden the null to a depth of 50 dB. Moreover

the ratio of the desired signal to noise of the input signal is decreased through the non-uniform loading. When the DOA error of the desired signal is 2°

the output SINR of the proposed method is 10 dB bigger than that of the general diagonal loading method. Therefore

the proposed method has a better robust performance.

关键词

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references

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Related Author

穆鹏程 1

殷勤业 1

王文杰 1

吴仁斌 1

姚敏立 3

Related Institution

MOE Key Laboratory for Intelligent Networks and Network Security, Xi'an Jiaotong University

School of Electronics and Information Engineering, Xi'an Jiaotong University

Staff Room 907, The Second Artillery Engineering University

Unit 96111 of PLA, Hancheng

College of Information and Telecommunication, Harbin Engineering University

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