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.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2010年第7期1380-1383,共4页
Systems Engineering and Electronics
关键词
宽带
波达角
参考频率
聚焦变换
wideband
direction of arrival（DOA）
reference frequency
focusing transformation
