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计算机工程 ›› 2010, Vol. 36 ›› Issue (20): 268-271. doi: 10.3969/j.issn.1000-3428.2010.20.093

• 开发研究与设计技术 • 上一篇    下一篇

一种改进的卫星空时DOA矩阵算法

许培培1,2,3,龚文斌1,2,余金培1,2,刘会杰1,2   

  1. (1. 上海微小卫星工程中心,上海 200050;2. 中国科学院上海微系统与信息技术研究所,上海 200050; 3. 中国科学院研究生院,北京 100039)
  • 出版日期:2010-10-20 发布日期:2010-10-18
  • 作者简介:许培培(1984-),女,硕士,主研方向:卫星通信,DOA估计;龚文斌,研究员;余金培、刘会杰,研究员、博士生导师

Improved Satellite Space-time DOA Matrix Algorithm

XU Pei-pei1,2,3, GONG Wen-bin1,2, YU Jin-pei1,2, LIU Hui-jie1,2   

  1. (1. Shanghai Engineering Center for Micro-satellite, Shanghai 200050, China; 2. Shanghai Institute of Micro-system and Information Technology Chinese Academy of Science, Shanghai 200050, China; 3. Graduate School of Chinese Academy of Sciences, Beijing 100039, China)
  • Online:2010-10-20 Published:2010-10-18

摘要:

提出一种改进的基于信号空时特征结构的高分辨二维波达方向(DOA)估计方法——时空DOA矩阵方法。该方法在保持原时空DOA矩阵方法无需二维谱峰搜索和参数配对等优点的基础上,通过构造X轴上的平移不变子阵列,产生2个DOA矩阵,利用这2个DOA矩阵的角度兼并曲线的差异,解决了原时空DOA矩阵方法的角度兼并问题。由于2个子阵可以重复利用阵元,该方法基本无冗余阵元和孔径损失。仿真结果证明了该方法的有效性。

关键词: 阵列天线, 智能天线, 波达方向估计, 空时二维处理

Abstract:

Based on the space-time eigenstructure of signals, an improved space-time Direction Of Arrival(DOA) estimation matrix method is proposed to estimate the high-resolution 2-D DOA of narrowband signals. The method obtains two DOA matrices through creating another sub array, which is the primary sub array shifted down X axes. Because these two matrices are different in angle ambiguity curves, the method can get accurate DOA; therefore advantages of the traditional space-time DOA matrix method, such as automatic parameter alignment and no need of 2-D search, are still available. Simulation results show that the method is effective.

Key words: array antenna, smart antenna, Direction Of Arrival(DOA) estimation, space-time 2-D processing

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