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应用科学学报 ›› 2012, Vol. 30 ›› Issue (2): 146-150.doi: 10.3969/j.issn.0255-8297.2012.02.007

• 论文 • 上一篇    下一篇

应用循环平稳特性的宽带信号DOA估计

刘付刚1;2， 刁鸣1   

  1. 1. 哈尔滨工程大学信息与通信工程学院，哈尔滨150001
    2. 黑龙江科技学院电气与信息工程学院，哈尔滨150027
  • 收稿日期:2011-03-08 修回日期:2011-07-23 出版日期:2012-03-26 发布日期:2012-03-30
  • 通信作者: 刘付刚，博士生，研究方向: 宽带信号检测、处理与识别，E-mail: liufugang_36@163. com；
  • 作者简介:刘付刚，博士生，研究方向: 宽带信号检测、处理与识别，E-mail: liufugang_36@163. com；刁鸣，教授，博导，研究方向：宽带信号检测、处理与识别、通信信号处理，E-mail: diaoming@hrbeu.edu.cn
  • 基金资助:

    黑龙江省科技攻关项目基金(No. GZ08A101)资助

DOA Estimation of Wideband Signals Based on Cyclostationarity

LIU Fu-gang1;2, DIAO Ming1   

  1. 1. College of Information and Communication Engineering, Harbin Engineering University, Harbin 150001, China
    2. College of Electronic and Information Engineering, Heilongjiang Institute of Science and Technology,
    Harbin 150027, China
  • Received:2011-03-08 Revised:2011-07-23 Online:2012-03-26 Published:2012-03-30

PDF

1105

被引次数

5

摘要：

针对循环平稳宽带信号DOA估计问题，结合信号的循环平稳特性和共轭循环平稳特性，采用子空间分解方法研究宽带信号DOA估计方法. 该方法同时利用宽带信号循环平稳和共轭循环平稳两方面信息构造出扩展循环相关矩阵，采用常规方法得到宽带信号的方位谱，继承了Cyclic MUSIC算法的优点，当处理宽带信号源时不需要估计最佳延时时间. 仿真结果表明该方法具有良好的宽带信号选择能力和分辨能力，能抑制大功率干扰信号，估计性能较好.

关键词: 阵列信号处理, 宽带信号DOA估计, 循环平稳, 共轭循环平稳

Abstract:

For direction of arrival (DOA) estimation of cyclostationarity wideband signals, by analyzing the signal’s cyclostationarity and conjugate cyclostationarity properties, a new method of DOA estimation from wideband signal is proposed based on the subspace decomposition method. The new method applies signals’ cyclostationarity and conjugate cyclostationarity information to form an extended cyclic correlation matrix.The spatial spectrum of wideband signal is obtained. The method has good performance of the cyclic MUSIC algorithm, and does not require optimal lag time to process the wideband signals. Computer simulations are conducted to show good performance in signal selective direction finding, with high resolution and interference suppression capability.

Key words: array signal processing, DOA estimation of wideband signals, cyclostationarity, conjugate cyclostationarity

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