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| 基于子空间拟合波达方向估计方法研究 | |
| 引用本文： | 苏淑靖,YAN Jing-long,颜景龙,马维贤.基于子空间拟合波达方向估计方法研究[J].计算机仿真,2009,26(1). |
| 作者姓名： | 苏淑靖 YAN Jing-long 颜景龙 马维贤 |
| 作者单位： | 1. 北京理工大学宇航科学技术学院,北京,100081;中北大学电子与计算机科学技术学院,山西,太原,030051 2. 北京理工大学宇航科学技术学院,北京,100081;中国兵器工业系统总体部,北京,100089 3. 北京理工大学宇航科学技术学院,北京,100081 |
| 摘 要： | 传统波达方向(DOA)估计方法由于受阵列尺寸的限制,对处于同一波束内的多个信号源无法得到正确的估计.为此提出了基于子空间拟合的信号到达方位角(DOA)估计算法--信号子空间拟合算法和噪声子空间拟合算法.算法通过对接收数据的子空间与实际信号导向矢量组成的子空间的拟合,来构造信号功率谱尖峰,从而估计目标信号的到达方位角.仿真实验对两种算法的性能进行了分析,分析表明基于噪声子空间拟合算法能突破空域瑞利限的限制,具有空间分辨率高、稳定性好的估计性能.信号子空间拟合算法只有在阵元数较大时,才能正确分辨距离较近的信号源,但具有对环境噪声不敏感的特点. |
| 关 键 词： | 信号波达方向 参数估计 子空间拟合 空间分辨力 |
A DOA Estimation Algorithm Based on Subspace Fitting Technology |
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| SU Shu-jing,YAN Jing-long,MA Wei-xian.A DOA Estimation Algorithm Based on Subspace Fitting Technology[J].Computer Simulation,2009,26(1). | |
| Authors: | SU Shu-jing YAN Jing-long MA Wei-xian |
| Affiliation: | 1.School of Navigation Science and Technology;Beijing Institute of Technology;Beijing 100081;China;2.School of Electronics and Computer Science and Technology;Central North University;Taiyuan Shanxi 030051;3.System Engineering Institute of China Weaponry Industry;Beijing 100089;China |
| Abstract: | Because of the array size limitation, the conventional methods can't estimate the direction of arrival(DOA) of signals spaced in one beamwidth.To solve this problem,two algorithms based on signal subspace and noise subspace fitting technology are presented.These algorithms estimate DOA by fitting the collected data subspace with the subspace spanned by steering vector,and construct a sharp spectrum peak,therefore estimate the DOA of signals.Performance of the algorithms are analyzed via computer simulative ... |
| Keywords: | Direction of arrival of signals Parameter estimation Subspace fitting Space resolution |
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