海军工程大学学报
海軍工程大學學報
해군공정대학학보
JOURNAL OF NAVAL UNIVERSITY OF ENGINEERING
2015年
3期
53-57
,共5页
声矢量阵%方位估计%平行因子
聲矢量陣%方位估計%平行因子
성시량진%방위고계%평행인자
vector hydrophone array%DOA estimation%PARAFAC
针对原有的声矢量阵三阶 PARAFAC(平行因子)模型维数高、参数求解过程运算量大的缺点,建立了一种降维的 PARAFAC 模型。将声矢量阵看作空间共点的声压传感器子阵和振速传感器子阵,计算各子阵输出数据的自协方差,并构造了三阶张量,最后证明该张量满足三阶 PARAFAC 模型并利用交替迭代算法估计声源参数。仿真和实测数据表明:该方法可以用于多目标方位估计且估计精度优于超分辨率的 ESPRIT 算法。
針對原有的聲矢量陣三階 PARAFAC(平行因子)模型維數高、參數求解過程運算量大的缺點,建立瞭一種降維的 PARAFAC 模型。將聲矢量陣看作空間共點的聲壓傳感器子陣和振速傳感器子陣,計算各子陣輸齣數據的自協方差,併構造瞭三階張量,最後證明該張量滿足三階 PARAFAC 模型併利用交替迭代算法估計聲源參數。倣真和實測數據錶明:該方法可以用于多目標方位估計且估計精度優于超分辨率的 ESPRIT 算法。
침대원유적성시량진삼계 PARAFAC(평행인자)모형유수고、삼수구해과정운산량대적결점,건립료일충강유적 PARAFAC 모형。장성시량진간작공간공점적성압전감기자진화진속전감기자진,계산각자진수출수거적자협방차,병구조료삼계장량,최후증명해장량만족삼계 PARAFAC 모형병이용교체질대산법고계성원삼수。방진화실측수거표명:해방법가이용우다목표방위고계차고계정도우우초분변솔적 ESPRIT 산법。
As the existing PARAFAC(Parallel Factor)model of vector hydrophone array(VHA)has a large dimension and needs a large amount of complex computation during the parameters estimation,a PARAFAC model with a smaller dimension is established.First,a single VHA is regarded as several parallel sub-arrays:a pressure sensor sub-array and two/three velocity sensor sub-arrays.Second,au-to-covariance matrix of each sub-array is calculated to form a third order tensor.The tensor is verified so as to meet a third order PARAFAC model,and the unknown parameters are obtained from TALS operations.Simulations and experiments show that the dimension-descending PARAFAC model can be used to find the DOAs of multiple sound sources and that it is better in accuracy than the ESPRIT algorithm.