摘要
基于最小均方误差(MMSE)准则提出一种宽带信号波达方向(DOA)估计算法。将宽带信号通过窄带滤波器组转化为窄带信号,采用自回归迭代方法恢复窄带信号的稀疏表示,根据稀疏表示得到信号源个数和DOA估计。该算法不仅有超分辨率能力,而且不必预先知道信号源个数。此外,本算法能对相干信号源进行DOA估计而不需要解相关预处理。仿真结果验证了该算法的有效性。
This paper proposes a new algorithm, which is based on MMSE, for wideband signal spatial direction-of-arrival （DOA） estimation. Pass the wideband signal through a bank of narrowband filters to obtain narrowband signals, then recover the sparse representation of the narrowband signals by using re-iterative method, and estimate the number of the sources and DOA from the sparse representation. The new method not only has high resolution, but also do not require the number of sources for di- rection finding. Furthermore, this algorithm has the ability of estimating coherent signals without decorrelation processing. The simu- lated results confirmed the effectiveness of the new method.
出处
《电子技术应用》
北大核心
2012年第11期119-121,125,共4页
Application of Electronic Technique
