摘要
宽带测向一直是阵列信号处理领域研究的热点。本文提出了一种基于无噪协方差矩阵变换的宽带测向算法。该算法通过构造变换矩阵,把各个窄带频率处的无噪协方差矩阵变换到聚焦频率处,然后应用子空间的方法得到波达方向估计值。与通常的信号子空间宽带测向算法相比,本文提出的算法不需要对波达方向进行预估计。理论分析证明了本文波达方向估计算法的无偏性。把该算法应用到均匀线阵上,仿真实验结果证明了算法的有效性。
Wide-band direction finding is a hot-point topic of research in array signal processing field. A novel wide-band direction finding algorithm was proposed. Noiseless covariance matrices at all frequency bins were transformed to noiseless covariance matrix at focusing frequency, then sub-space method was utilized to attain the DOA estimation. ＇Compared with traditional wideband signal subspace direction finding algorithms, the proposed algorithm does not need pre-estimate of direction of arrival. The theoretical analysis proved the estimation of the proposed algorithm to be unbiased. The simulated results proved the proposed algorithm applied to uniform linear array to be effective.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2008年第3期291-295,共5页
Acta Armamentarii
关键词
信息处理技术
宽带测向
信号子空间方法
无噪协方差矩阵变换
均匀线阵
information processing technique
wide-band direction finding
signal sub-space method
noiseless covariance matrix transform
uniform linear array
