摘要
在无线通信、雷达和声纳等许多实际应用场合,存在大量的移动分布式信号源,跟踪其二维波达方向(direction-of-arrival,DOA)非常重要。针对相干分布源,利用两个平行的均匀线阵,提出了一种二维DOA快速跟踪算法。该算法利用逼近幂迭代子空间跟踪算法更新分布源的信号子空间,并由新的信号子空间估计分布源的中心方位角和中心俯仰角。该算法跟踪性能良好,计算复杂度低且满足全局收敛。此外,算法能够跟踪多个分布源并且与分布源的具体角分布形式无关。仿真结果证实了算法的有效性。
In many practical applications, such as wireless communications, radar and sonar, there are lots of mobile distributed signal sources. And it is very important to track the two-dimensional （2-D） direction-of-arrival （DOA） of distributed sources. Aiming at coherently distributed sources, this paper presents a fast algorithm for the 2-D DOA tracking using two parallel uniform linear arrays. The presented algorithm updates the signal subspace of distributed sources by utilizing the approximated power iterations （API） subspace tracking algorithm, and then the new signal subspace is used to estimate the central azimuth and central elevation of distributed sources. The algorithm provides an excellent tracking performance and lower computational complexity, and satisfies a global convergence property. In addition, the algorithm can track multiple distributed sources and does not depend on the specific angular distribution shapes of distributed sources. Simulation results validate the efficiency of the algorithm.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2011年第10期2169-2173,共5页
Systems Engineering and Electronics
基金
中央高校基本科研业务费专项资金(ZYGX2009J092)资助课题
关键词
分布式信号源
二维波达方向跟踪
逼近幂迭代
子空间跟踪
distributed signal source
2 D direction-of arrival （DOA） tracking
approximated power iteration （API）
subspace tracking
