均匀圆阵下一种宽带类MUSIC算法

Wideband MUSIC-Like Method Based on Uniform circular array

针对为解决对雷达和通信中宽带信号定位问题,并提高定位精度,提出了一种均匀圆阵下的DOA估计方法,该方法对宽带信号进行快速傅里叶变换(FFT),以窄带多重信号分类(MUSIC)算法为依据,将宽带信号分解为不同频带上的窄带信号,通过对每个频带进行窄带信号子空间处理,获得信号角度的估计,将多重信号角度估计组合得到宽带信号的方位角和俯仰角。经过理论推导及仿真验证,该算法具有高精确定位及全向测向的优点。

In order to solve the problem of location that wideband signal in radar and telecommunication, a new DOA algo rithm estimation based on uniform circular arrays is presented, the algorithm uses FFT to handle wideband signal, and ac cording to the Narrow band MUSIC algorithm, the wideband signal is decomposed into narrow band signal with non-over lapping frequency, and then it processes the subspace of narrow band signal to get the estimation of the initial angle, final ly it gets use of the combined initial estimation to get the DOA of wideband. Through theoretical derivation and simula tion, the result shows that the algorithm has high precision in positioning and omni-direetion searching.