用于測(cè)向測(cè)速的二維譜估計(jì)方法
A 2-D SPECTRUM ESTIMATION METHOD FOR DETERMINING BEARING AND DOPPLER FREQUENCY
-
摘要: 雷達(dá)應(yīng)用領(lǐng)域中的一個(gè)重要問(wèn)題是測(cè)向測(cè)速,精確地測(cè)定多普勒頻率和方位角能夠?qū)崿F(xiàn)對(duì)目標(biāo)回波信號(hào)的高分辨率處理,從而進(jìn)行目標(biāo)跟蹤。本文提出一種超分辨的二維譜估計(jì)方法,它利用的是陣列處理技術(shù),對(duì)天線接收數(shù)據(jù)進(jìn)行本征分析,將信號(hào)數(shù)據(jù)張成一個(gè)空間并對(duì)其進(jìn)行分解,根據(jù)正交原理分割成信號(hào)子空間和噪聲子空間,構(gòu)造出噪聲本征矢量,利用信號(hào)子空間與噪聲子空間的正交性,在空間譜上形成極值點(diǎn),從而達(dá)到對(duì)方向和速度的二維高分辨率估計(jì)。該方法應(yīng)用于相控陣?yán)走_(dá)信號(hào)檢測(cè),可以精確地測(cè)定多普勒頻率和方位角度,提取多個(gè)空間運(yùn)動(dòng)目標(biāo)的二維信息。文章的最后給出了計(jì)算機(jī)模擬成像結(jié)果,驗(yàn)證了算法的有效性。Abstract: A new approach with high resolution 2-D spectrum estimation is presented. Based on the array signal processing and the eigenstructure decomposition method, the signal subspace and the noise subspace are achieved by reconstructing and decomposing the data matrix collected by the array sensors. By using the orthogonal properties of the two subspaces, the information about the velocities and bearings of spatial moving targets can be exactly obtained. This method is applied to phased array radars. The computer simulation results demonstrate its availability.
-
Sehmidt R O. Multipleemitter location and signal parameter estimation, Proc. RADC, Spectral Estimation Workshop, 1979,243-258.[2][2][3]Karasaro I. IEEE Trans. on ASSP, 1986, ASSP-34(1):8-12.[4]He J X. Adaptive digital beam forming and space spectrum estimation, B.E. thesis, Dept. Electron.Eng., Beijing University of Aeronautics and Astronautics, July, 1991. -
計(jì)量
- 文章訪問(wèn)數(shù): 2272
- HTML全文瀏覽量: 92
- PDF下載量: 382
- 被引次數(shù): 0
下載:
