基于修正空间平滑的改进正交化波束形成算法  

Modified orthogonalization algorithm for beamforming based on improved spatial smoothing

作　　者：余继周[1] 陈定昌[2] 

机构地区：[1]中国航天科工集团二院23所,北京100854 [2]中国航天科工集团二院,北京100854

出　　处：《系统工程与电子技术》2005年第7期1189-1191,共3页Systems Engineering and Electronics

摘　　要：针对正交化自适应波束形成算法的零点会偏离干扰方向、当干扰相干时算法失效问题,提出了一种基于修正空间平滑的改进正交化自适应波束形成算法。该算法利用修正空间平滑技术克服正交化算法不能工作于相干干扰环境的缺点;利用总体最小二乘方法得到噪声子空间,总体最小二乘处理减轻了噪声的影响,因而估计的噪声子空间接近真实噪声子空间,干扰方向形成零点。计算机仿真结果表明此算法是有效的。Nulls shift from the interferences directions when the orthogonalization algorithm for adaptive beamforming is used and the algorithm fails to work when the interferences are coherent. A modified orthogonalization algorithm for adaptive beamforming based on improved spatial smoothing is proposed. The algorithm utilizes improved spatial smoothing technique for overcoming the problem that the orthogonalization algorithm can not work in the environment of coherent interferences and uses total least squares method to obtain the noise subspace. The total least squares process weakens the influence of the noise so the estimated noise subspace is close to the true noise subspace and the algorithm puts nulls in the interferences directions. Computer simulation result shows that the algorithm is effective.

关 键 词：自适应波束形成 正交化算法 空间平滑 

分 类 号：TN958[电子电信—信号与信息处理]