摘要
讨论了基于虚拟阵列扩展的DOA估计问题,对此问题传统阵列处理方法主要利用高阶累积量进行阵列扩展,计算量较大。在四阶矩基础上,通过扩大阵列孔径和自由度解决信源数目较阵元数多的DOA估计问题,利用特殊矩阵对扩展阵列的冗余信息进行剔除,降低了计算复杂度,提高了计算效率。仿真结果验证算法高效可靠,为工程实现提供了理论基础。
The Direction-of-Arrival （ DOA） estimation problem based on virtual array extension is analyzed. For this problem, higher order statistics technique for array extension is a main way for traditional array processing method with a large amount of calculation. The proposed method is based on the fourth-order moments for estimating DOA of more source signals than array ele-ments. Computational complexity is reduced and the computational efficiency is improved by the special matrix array for extension to eliminate redundant information. The simulation verifies the algorithm is efficient and reliable, and provides a theoretical basis for engineering implementa-tion.
出处
《电子信息对抗技术》
2014年第5期32-35,39,共5页
Electronic Information Warfare Technology
关键词
阵列扩展
DOA估计
虚拟阵列
四阶矩
array extension
DOA estimation
virtual array
fourth-order moments
