| 摘要: |
| 针对多径信道环境下存在互耦误差的均匀线阵，提出了一种联合波达方向估计及互耦
误差自校正算法。在不改变阵列互耦误差的条件下，首先利用虚拟阵列平移预处理方法，将
相干信源协方差矩阵恢复到满秩。进而利用互耦误差的对称Toeplitz特性，基于子空间原理
构造一代阶函数，采用秩损的方法得到互耦误差条件下的DOA估计及阵列互耦误差。数值仿
真结果表明,该算法具有良好的DOA估计性能与互耦误差自校正性能。 |
| 关键词: 均匀线阵 DOA估计 互耦误差 阵列自校正 多径信道 |
| DOI： |
|
| 基金项目:国家科技重大专项资助项目（2011ZX03003-001-01）；重庆市自
然科学基金资助项目（CSTS，2010BB2417）；重庆市教委自然科学基金资助项目（KJ110526
）；信号与信息处理重庆市重点实验室建设项目（CSTC2009CA2003） |
|
| A DOA estimation and mutual coupling self-calibration algorithm for uniform linear array in the presence of multipath |
| LI Qiang,CHEN Jun-peng,JING Xiao-rong |
| () |
| Abstract: |
| To solve mutual coupling of uniform linear array（ULA） in the presence of mu
ltipath channel, a joint Direction of Arrival（DOA）estimation and mutual coupli
ng calibration algorithm is proposed. Firstly, coherent source covariance matri
x is restored to full rank via the preprocessing method of virtual array moving
without changing the mutual coupling. Then a cost function is construc
ted based on subspace theory and is minimized by rank loss method to estimate th
e DOA of the signals and mutual coupling error using the Toeplitz structure of t
he covariance matrix for ULA. Simulation results show that the algorithm has eff
ective performance for DOA estimation and mutual coupling self-calibration. |
| Key words: uniform linear array DOA estimation mutual coupling array self-calibration multipath channel |
