基于传播算子的声学矢量传感器阵列扩展孔径二维DOA估计算法  

Extended-Aperture Two-Dimensional DOA Estimation with Acoustic Vector Sensor Array Using the Propagator Method

作　　者：顾陈[1] 何劲[1] 朱晓华[1] 刘中[1] 

机构地区：[1]南京理工大学电子工程系,江苏南京210094

出　　处：《电子学报》2010年第10期2377-2382,共6页Acta Electronica Sinica

基　　金：中国博士后基金(No.20080431098);南京理工大学自主科研专项计划(No.2010ZYTS028)

摘　　要：本文提出一种基于传播算子的声学矢量传感器阵列扩展孔径二维DOA估计算法.首先,利用传播算子方法得到一组高精度模糊的DOA估计值;然后,利用声学矢量传感器的特点得到另一组低精度无模糊的DOA估计值;最后,利用无模糊估计值对模糊估计值进行解模糊处理,得到高精度无模糊的DOA估计值.提出的算法无需进行特征值分解或奇异值分解进行信号子空间/噪声子空间的估计.与基于ESPRIT的算法相比,提出的算法的计算量约为信号个数与声学矢量传感器个数的四倍之比.计算机仿真结果表明在信噪比不是很低时,提出的算法与基于ESPRIT的算法具有相当的估计性能.This paper proposes a propagator-based algorithm for underwater acoustic 2-D direction-of-arrival（DOA） estimation with an array of acoustic vector sensors.Firstly,the propagator method is exploited to extract a set of high accurate but ambiguous DOA estimates;then,the character of acoustic vector is exploited to extract another set of low accurate but unambiguous DOA estimates;finally,the unambiguous DOA estimates are used to disambiguate the ambiguous DOA estimates to yield high accurate and unambiguous DOA estimates.The proposed algorithm requires no eigen-decomposition or singular value decomposition into the signal and noise subspaces.Comparing with its ESPRIT counterpart,the proposed propagator algorithm has its computational complexity reduced by this ratio：the number of sources to quadruple the number of acoustic vector sensors.Simulation results show that at high and medium signal-to-noise ratio,the proposed propagator algorithm＇s estimation accuracy is similar to its ESPRIT counterpart.

关 键 词：声学矢量传感器 DOA估计 扩展孔径 传播算子算法 

分 类 号：TN951[电子电信—信号与信息处理]