任意平面阵列下的宽带信号跟踪方法

Method of tracking for wideband signals with arbitrary plane array

到达方向(Direction of arrival,DOA)估计是一种传统的信号跟踪算法,它的计算量较大,无法用于实时跟踪系统,特别是对于宽带信号处理。因此提出了一种基于聚焦矩阵更新的宽带信号跟踪方法,首先对将接收信号划分为若干互不重叠的子频带,之后利用相干信号子空间聚焦方法将这些信号聚焦到同一频点上,再通过改进的快速近似子空间跟踪技术来更新聚焦矩阵,最后采取窄带信号DOA估计算法实现宽带信号的跟踪,该方法计算量较少,便于工程上的实现,并且适用于任意的平面阵列,仿真结果证明了方法的有效性。

Direction of arrival（DOA） estimation is a traditional method of tracking signals, its calculation is very complicated, and it does not adapt to real time tracking system, especially for wideband signals. Therefore, a new method of tracking for wideband signals based on focusing matrices updating is proposed, first, the received signals are divided into some non-overlapping subbands. Second, transforming them on the focusing frequency by coherent signal subspaee method （CSM） , then the focusing matrices are updating through technique of fast approximate subspaee tracking. At last, DOA estimation method of narrowband signals is used for tracking wideband signals. The method is easy to be realized in project, moreover, it adapts to arbitrary plane array, the performance has been proved by simulations.