摘要
在二维波达方向(DOA)估计领域,均匀圆阵(UCA)应用越来越广泛。针对均匀圆阵,提出了一种可在多径环境下估计二维波达方向的新算法,该算法充分利用了空间和时间上的特性,估计P个多径信号方向仅需P+1个天线阵列。多径信号经过时间平滑处理后,再利用改进的主分量分析(PCA)迭代算法求空间谱,各来波方向可被实时快速地估计出来,整个估计过程中不需要预先知道多径数量,运算复杂度低,系统结构简单。最后给出的仿真试验结果验证了提出方法的有效性。
In the field of 2-D DOA estimation,the applications of UCA become more and more wide.A novel algorithm of 2-D DOA estimation under multipath environment is proposed for UCA,which can sufficiently utilize the temporal and spatial features of the signal,and just need P＋1 antenna arrays when finding P directions.Multipath signal is processed by temporal smoothing,then the spatial spectrum is obtained by utilizing modified PCA iterative algorithm,the directions of every incoming wave can be estimated rapidly of real time without knowing the numbers of multipath signals in advanced.The computation load is reduced and the structure is simplified by utilizing the proposed algorithm.Finally,the simulation results demonstrate the effectiveness of the proposed approach.
出处
《中国电子科学研究院学报》
2010年第6期647-651,共5页
Journal of China Academy of Electronics and Information Technology
