摘要
采用FRFT方法研究矢量水听器阵的宽带信号多目标方位估计问题.进行了与FRFT的二维矢量水听器线阵方位估计算法相结合的理论推导与仿真实验.研究证明,采用二维矢量水听器阵可以实现全空间无模糊定向,该方法在处理多源信号时可以避免交叉项的干扰,对于宽带信号的处理,不需要进行频率搜索或频率聚焦变换就可以进行方位估计.该方法在信噪比不低于-10 dB时都具有较好的估计精度.
Problems in direction of arrival（DOA） estimation with a wide-band multi-source based vector-sensor array are the main focus of this paper.Both the DOA estimation algorithm and simulation results were presented by a combination of the fractional Fourier transform（FRFT） method and a two-dimensional vector hydrophone linear array.The studies showed that a two-dimensional vector hydrophone array can have no ambiguity of DOA estimation.Interpolation problems can be effectively avoided when dealing with multi-sources.For the DOA estimation problem with wide-band signals,the FRFT algorithm can be used without frequency searching and focusing.The method has good estimation accuracy when the signal-to-noise ratio（SNR） is not less than-10 dB.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2010年第6期708-713,共6页
Journal of Harbin Engineering University
基金
国家级重点实验室基金资助项目(9140C2009010906)
