两种实现宽带信号空间重采样测向算法的比较  

Comparision of Two Different Methods for Spatial Resampling on Wideband Signal′s DOA

作　　者：田野[1] 赵春晖[2] 

机构地区：[1]哈尔滨师范大学,黑龙江哈尔滨150500 [2]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001

出　　处：《现代电子技术》2008年第9期145-149,共5页Modern Electronics Technique

基　　金：高等学校优秀青年教师教学科研奖励计划资助(2001-226)

摘　　要：空间重采样是一种用于宽带信号的处理方法。由于宽频带的缘故,使得不同频率的信号阵列流行不同,适用于窄带信号的处理方法就不能直接用于宽带信号。为了把不同频率的信号子空间对齐,空间重采样的方法通过将接收到的阵列信号通过变换得到满足要求的虚拟阵列输出,从而达到聚焦的效果,基于聚焦思想的算法保持了其对相干信号的处理能力。可以通过不同的方法来实现空间重采样,论述了空间重采样的基本原理以及两种不同的实现方法,并通过仿真比较了两种算法的测向性能。Spatial resample is a kind of algorithm used to process wideband signals. Due to the wide band,as the different frequency the array manifold is different, that those methods we used in single frequency circumstances could not be used in wideband situations any more. In order to make the signal subspaces alike （the same is what we subject to）, we receive virtual array outputs which are transferred from the inputs received by receiving array through spatial resample processing. Basing on focus algorithm, the algorithm remains the ability of handling coherent signals. There are different ways to implement spatial resample. The basic principle of spatial resample here is discussed and two different means is proposed. At last the two through emulations are compared.

关 键 词：空间重采样 宽带信号 方位估计 FFT 滤波器 

分 类 号：TN911.83[电子电信—通信与信息系统]