哈尔滨工程大学学报
哈爾濱工程大學學報
합이빈공정대학학보
JOURNAL OF HARBIN ENGINEERING UNIVERSITY
2015年
8期
1131-1136
,共6页
白生祥%张森%张学波%郑春弟
白生祥%張森%張學波%鄭春弟
백생상%장삼%장학파%정춘제
干涉合成孔径声呐%相位估计%联合协方差矩阵%矩阵拟合%信号子空间%像素
榦涉閤成孔徑聲吶%相位估計%聯閤協方差矩陣%矩陣擬閤%信號子空間%像素
간섭합성공경성눌%상위고계%연합협방차구진%구진의합%신호자공간%상소
InSAS%phase estimation%joint covariance matrix%matrix fitting%signal subspace%pixel
针对干涉合成孔径声呐相位估计问题,提出一种基于矩阵拟合的干涉相位估计方法。该方法通过构造联合观测数据矢量获取邻近像素的相干信息,通过对观测数据矢量对应的联合协方差矩阵进行拟合实现干涉相位的准确估计,优点是能够避免子空间分解类方法中存在的信号子空间扩散问题。所提方法通过给出干涉相位闭式解的形式,解决了角度搜索导致的大运算量问题。仿真和实测数据的处理结果证明了方法的有效性。
針對榦涉閤成孔徑聲吶相位估計問題,提齣一種基于矩陣擬閤的榦涉相位估計方法。該方法通過構造聯閤觀測數據矢量穫取鄰近像素的相榦信息,通過對觀測數據矢量對應的聯閤協方差矩陣進行擬閤實現榦涉相位的準確估計,優點是能夠避免子空間分解類方法中存在的信號子空間擴散問題。所提方法通過給齣榦涉相位閉式解的形式,解決瞭角度搜索導緻的大運算量問題。倣真和實測數據的處理結果證明瞭方法的有效性。
침대간섭합성공경성눌상위고계문제,제출일충기우구진의합적간섭상위고계방법。해방법통과구조연합관측수거시량획취린근상소적상간신식,통과대관측수거시량대응적연합협방차구진진행의합실현간섭상위적준학고계,우점시능구피면자공간분해류방법중존재적신호자공간확산문제。소제방법통과급출간섭상위폐식해적형식,해결료각도수색도치적대운산량문제。방진화실측수거적처리결과증명료방법적유효성。
An interferometric phase estimation method based on matrix fitting is proposed for synthetic aperture sonar interferometry ( InSAS) phase estimation. In this method, the joint data vector is formulated for making use of inter?ferometric information embedded in the neighboring pixels and the matrix fitting technique is used for joint covari?ance matrix corresponding to observation data vector, which makes it possible to accurately estimate the interfero?metric phase embedded in joint covariance matrix. The benefit is to avoid the signal subspace problem that exists in the subspace decomposition method. In this paper, a closed?form solution of interferometric phase is given as an al?ternate to the angle?scanning search based method since it is time?consuming. Simulation results and processing of real data demonstrated the validation of the method.