Hermite函数展开的宽带DOA估计  

DOA estimation of wideband signals based on the Hermite function

作　　者：张曙[1] 李清伟[1] 

机构地区：[1]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：《哈尔滨工程大学学报》2012年第9期1170-1174,1198,共6页Journal of Harbin Engineering University

基　　金：国防科学技术工业委员会基础研究基金资助项目(40106030503)

摘　　要：针对一般的宽带DOA估计算法需要进行角度预估问题,提出了一种基于Hermite函数展开的宽带DOA估计方法.给出了算法的理论推导过程,并且通过对比仿真试验,验证了该算法能够有效地实现角频分离,避免了角度预估计问题.由于Hermite函数良好的收敛特性和能量集中的优点,与基于Bessel函数或Legendre函数展开的宽带算法相比,具有减小运算复杂度和提高估计精度的优点.Due to the problem that common algorithms of direction of arrival （DOA） estimation of wideband signals need pre-estimation of the angles, an algorithm based on the Hermite function was proposed. Theoretical derivation of the algorithm was given, and through comparison and simulation it was proven that this algorithm can effectively sepa- rate angles from frequency, which can eliminate the problem of pre-estimation. Due to the excellent ability of conver- gence and the feature of energy concentration of the Hermite function, this algorithm has less computational complexi- ty and higher estimation precision than the methods based on the Bessel function or Legendre function.

关 键 词：宽带信号 DOA 估计 角频分离 角度预估计 HERMITE 函数 

分 类 号：TN911.6[电子电信—通信与信息系统]