一种有效的互耦阵列测向方法

由于阵列互耦效应破坏了阵列各阵元接收数据之间的相位关系,导致阵列测向效果显著恶化。为此,利用均匀线形阵列互耦矩阵的带状Toeplitz结构,通过在阵列两侧分别增加一个与原始阵列阵元一样的辅助阵元,很好地补偿了互耦效应对原始阵列接收数据的影响,得到了理想的阵列测向效果。仿真结果验证了方法的有效性。

An effective DOA estimation method with mutually coupled array

The effect of mutual coupling disturbs the DOA-dependent phase shift between array outputs at different channels, thus deteriorate the performance of direction finding. In order to compensate for the effect and improve the precision of the direction estimates, the special banded Toeplitz structure of the mutual cou- pling matrix of the uniform linear arrays （ULA） is exploited,and a novel method is proposed by appending an assistant antenna at each side of the original array. Simulation results are carried out to demonstrate the effec- tiveness of the proposed method.