基于阵列接收数据合并的宽带DOA算法  

Wideband DOA algorithm based on combining of received array snapshots

作　　者：刘春静 刘枫[2] 张曙[1] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001 [2]信息综合控制国家重点实验室,四川成都610036

出　　处：《系统工程与电子技术》2010年第7期1380-1383,共4页Systems Engineering and Electronics

摘　　要：提出了一种新的宽带波达角(direction of arrival,DOA)算法,该算法将各频率点的协方差矩阵相加后构造出一个新的协方差矩阵,从而实现DOA估计。这种新的思路来源于聚焦变换的思想并在理论上得到了证明。然后,详细讨论了算法中最优参考频率的选择问题。分析表明,与传统的宽带DOA算法相比,新算法的运算量较低。仿真结果显示,新算法的性能优于其他宽带DOA算法,同时仿真实验也验证了最优参考频率选取准则的正确性。A novel direction of arrival（DOA） estimation algorithm for wideband sources is proposed.This technique estimates DOAs according to a new covariance matrix which is constructed by summing up the covariance matrices of various frequency bins.The new idea originates from the focusing transformation and its validity is proved theoretically.Afterwards,the optimal reference frequency is discussed in detail.The analysis of computational cost shows that the new algorithm has less computational burden compared with the conventional wideband DOA algorithms.Simulation results show that the new algorithm performs better than others and the criterion of choosing optimal reference frequency is also validated by simulations.

关 键 词：宽带 波达角 参考频率 聚焦变换 

分 类 号：TN911[电子电信—通信与信息系统]