摘要
提出了一种增强MUSIC算法分辨力的方法。基本内容是通过天线间距的虚拟扩展提高天线的阵列孔径,达到增加算法分辨力的目的。同时,针对阵列间距虚拟扩展带来的虚假谱峰,提出了利用矩形窗函数进行虚假谱峰消除的方法,并给出了消除虚假谱峰的具体流程。仿真结果证明了天线间距虚拟扩展技术可以有效提高阵列天线的分辨力,同时,证明了矩形窗在消除虚假谱峰过程中的有效性,尤其当空间信号源间距较小时,改进算法的优势体现更加明显。
A method that can enhance the resolution of MUSIC algorithm is presented in the paper.Its basic idea is virtual arrays can be used instead of the real sensor array to increase aperture of the array,thereby,the purpose of resolution enhancement is implemented.Rectangular window is used to eliminate the false peaks which are taken by virtual arrays,and its flowchart is given.Simulation results prove the effectiveness of the method.Especially,the advantages of the improved algorithm are more obvious when signal sources are close enough.
出处
《无线电工程》
2011年第5期23-24,42,共3页
Radio Engineering
关键词
DOA估计
相位模糊
虚假谱峰
矩形窗
DOA estimation
phase ambiguity
false peaks
rectangular window
