摘要
利用内插阵列变换和前/后向空间平滑技术在阵列信号处理中的优点,提出了一种对相干信源进行超分辨测向的有效方法.该方法首先在不同的内插区间将均匀圆阵虚拟成等距均匀线阵,使其阵列流型具有Vandermonde矩阵形式,然后使用基于前/后向空间平滑技术的MUSIC算法对相干信号的波达方向进行有效地估计.该方法的主要优点在于,当相干信源数多于阵元数时仍可有效地估计出相干信源的二维波达方向,并且可实现全方位、无模糊的角度估计.计算机仿真证明了其有效性.
An efficient method of DOA estimation of coherent sources is proposed by use of the advantages of interpolating array transformation and forward/backward smoothing technology in array signal processing. Uniform circular array is converted to uniform linear array in different interpolation section so that its array flow has the Vandermonde form, and then the DOA of coherent sources is estimated effectively using MUSIC algorithm based on forward/backward smoothing technology. The main advantage of the proposed method is that it can estimate DOA of coherent sources when the number of sources is bigger than that of sensors, and also realize entire azimuth and nonfuzzy estimation. Its validity is confirmed by computer simulation.
出处
《应用科技》
CAS
2007年第2期1-4,共4页
Applied Science and Technology
作者简介
吴小强（1984-），男，硕士研究生，主要研究方向：空间谱估计，E—mail：wuxiaoqiang@hrbeu．edu．cn．
