电子科技大学学报
電子科技大學學報
전자과기대학학보
JOURNAL OF UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA
2013年
1期
53-57
,共5页
宋爱民%李堰%刘剑%陈校平
宋愛民%李堰%劉劍%陳校平
송애민%리언%류검%진교평
阵列信号处理%波达方向估计%多级维纳滤波%非圆信号%多项式求根
陣列信號處理%波達方嚮估計%多級維納濾波%非圓信號%多項式求根
진렬신호처리%파체방향고계%다급유납려파%비원신호%다항식구근
array signal processing%direction-of-arrival estimation%multistage wiener filter%noncircular signals%polynomial rooting
针对非圆信号DOA估计的计算量问题,运用多级维纳滤波和信号子空间的多项式求根方法,提出了一种快速算法.首先利用非圆信号特性构造出扩展阵列输出矩阵,然后不需进行协方差矩阵的生成和分解,利用多级维纳滤波求出信号子空间,针对均匀线阵推导出信号子空间多项式求根方法,得出目标的DOA估计值.新算法的均方根误差性能与非圆信号求根MUSIC算法、非圆信号ESPRIT算法、非圆信号扩展传播算子算法等快速算法相仿,但是计算量小于已有的算法,特别是在阵元数较多的情况下算法的实时性优势更加明显.
針對非圓信號DOA估計的計算量問題,運用多級維納濾波和信號子空間的多項式求根方法,提齣瞭一種快速算法.首先利用非圓信號特性構造齣擴展陣列輸齣矩陣,然後不需進行協方差矩陣的生成和分解,利用多級維納濾波求齣信號子空間,針對均勻線陣推導齣信號子空間多項式求根方法,得齣目標的DOA估計值.新算法的均方根誤差性能與非圓信號求根MUSIC算法、非圓信號ESPRIT算法、非圓信號擴展傳播算子算法等快速算法相倣,但是計算量小于已有的算法,特彆是在陣元數較多的情況下算法的實時性優勢更加明顯.
침대비원신호DOA고계적계산량문제,운용다급유납려파화신호자공간적다항식구근방법,제출료일충쾌속산법.수선이용비원신호특성구조출확전진렬수출구진,연후불수진행협방차구진적생성화분해,이용다급유납려파구출신호자공간,침대균균선진추도출신호자공간다항식구근방법,득출목표적DOA고계치.신산법적균방근오차성능여비원신호구근MUSIC산법、비원신호ESPRIT산법、비원신호확전전파산자산법등쾌속산법상방,단시계산량소우이유적산법,특별시재진원수교다적정황하산법적실시성우세경가명현.
A computationally efficient direction-of-arrival (DOA) estimation algorithm for noncircular signals based on multistage wiener filter theory and polynomial rooting technique is proposed. Firstly, the array extension matrix is constructed by utilizing the noncircularity of the signals. Secondly, the signal subspace is achieved with multistage Wiener filter (MSWF), which does not require the formation of the covariance matrix and its eigendecomposition. Thirdly, the polynomial rooting method of the signal subspace is derived based on uniform linear arrays, by which the estimate of DOA are obtained. The proposed algorithm is more computationally efficient, especially for the case of large number of sensors, in comparison with NC-root-MUSIC, NC-ESPRIT and extended propagator method (EPM), although their performances are near the same.