基于模式空间变换的宽带波束形成方法

摘要

由于均匀圆阵独特的空间分布使其比均匀线阵有许多优点,且均匀圆阵在模式空间变换可以转化为虚拟线阵,而转换后的虚拟线阵具有远场模式下与频率无关的特性,因此均匀圆阵可以处理宽带信号.在此分析基础上,针对均匀圆阵提出一种基于模式空间变换的宽带波束形成方法.设计出该方法的原理图并给出了该方法的具体操作步骤,还通过计算机仿真实验验证了方法的有效性.该方法只适用于均匀圆阵系统,因而针对性强,具有很好的应用前景.%As the special spatial distributing of Uniform Circular Arrays (UCA), UCA has more advantage than Uniform Line Arrays(ULA),and can be translated into Dummy Uniformity Line Array(DULA) under the mode-space.The DULA has non-relationship with frequency in the far-field mode, so the UCA can be used to process wideband signal.Based on above analysis,this paper brings forward a method of wideband beamforming based on mode-space transformation for UCA.Schematic diagram and operational procedure are designed, and lastly the computer simulation experiment proofs that this method is of availability.This method is only suitable for UCA system and has large pertinence, so it has good application foreground.