基于自适应频率不变响应基阵的宽带信号方位估计

Wideband DOA estimation based on an adaptive frequency-invariant-response array

提出一种设计频率不变响应基阵的自适应模拟方法,并将其用于构造波束形成矩阵来实现宽带信号的聚焦。该方法不仅保持了波束域方位估计算法的运算量小、分辨率高等优点,还具有相关信号子空间能解相关源的能力,且对阵形及各阵元的指向性也没有任何限制。仿真结果说明了本文方法的有效性。

An adaptive simulation method for the design of array with frequency invariant response is proposed and is used to construct beamformer matrix to focus a wideband signal. The proposed method combine the advantages of reducing computation work and increasing the resolution probability of the beam-space DOA estimation method as well as reserving the ability to resolve the correlated source of the CSM method. The proposed method has no restriction in geometry of array and sensor pattern. Simulations are given to demonstrate the efficacy of the proposed method.