基于最大特征值算法的非圆相干信源DOA估计.doc

文档介绍：
基于最大特征值算法的非圆相干信源 DOA
估计#
丁兆明,刁鸣**
5
10
(哈尔滨工程大学信息与通信工程学院)
摘要:针对非圆相干信号的解相干问题,给出了一种新的最大特征值算法。利用信号源的非
圆特性,虚拟地扩展了阵元个数,使阵列信息增至扩展前的两倍,对信号源数目的估计突破
了 M-1(M 为阵元数)的限制;依据相干信号对应大特征值的特征矢量可由导向矢量线性表征
的原理,给出了一种改进的最大特征值算法解相干,避免了空间平滑思想的多维谱峰搜索及
最大似然算法运算量过大的问题;仿真表明,该方法对非圆相干信号的 DOA 估计具有优良
的有效性和鲁棒性。
关键词:最大特征值;DOA;非圆特性;相干源
中图分类号:TN911
15
Estimating Direction-of-Arrival of Non-circular Coherent
Signals Based on Maximum Eigenvalue Algorithm
DING Zhaoming1, DIAO Ming2
(1. Harbin Engineering University, Information munication College;
20
25
30
35
40
2. Harbin Engineering University, Information munication engineering College)
Abstract: A new Maximum Eigenvalue de-correlation algorithm is presented to estimate the
direction of arrival of non-circular coherent signals. It takes advantage of non-circular
characteristic of the signal, extends the number of the received array elements and doubles the
array information, which makes the estimation of signal source number breakthrough the
maximum M-1(with M representing the number of sensor elements). According to the principle of
the large eigenvalues of coherent signals could be linear represented by steering vector, use an
improved maximum eigenvalue algorithm to solute coherent signals, which avoids the problem of
multidimensional spectrum peak search which made by smoothing algorithm and the large
calculated amount made