存在幅度/相位误差的稳健波束形成

基于线性约束最小方差准则(LCMV)的自适应波束形成器,在存在阵列幅度/相位误差情况下性能会显著下降。针对此情况,基于信号子空间与噪声子空间的彼此正交特性,对存在误差的信号导向矢量和干扰导向矢量,同时向信号子空间投影,然后对投影后的导向约束采用LCMV准则进行自适应波束形成。理论分析和仿真结果表明文中方法对阵列幅度、相位误差具有稳健性。

Robust adaptive beamforming under gain and phases error

The performance of Linearly Constrained Minimum Variance Beamformer(LCMVB) will degrade markedly when signal steering vector mismatches exist.A method based on the orthogonal property between signal subspace and noise subspace is proposed for robust adaptive beamforming.The robustness would be achieved by projecting the signal steering vector and the null constrain steering vector on signal subspace followed by LCMVB.The robustness and effectiveness of the algorithm is proved by theory analysis and extensive simulation.