用于測向測速的二維譜估計方法
A 2-D SPECTRUM ESTIMATION METHOD FOR DETERMINING BEARING AND DOPPLER FREQUENCY
-
摘要: 雷達應(yīng)用領(lǐng)域中的一個重要問題是測向測速,精確地測定多普勒頻率和方位角能夠?qū)崿F(xiàn)對目標(biāo)回波信號的高分辨率處理,從而進行目標(biāo)跟蹤。本文提出一種超分辨的二維譜估計方法,它利用的是陣列處理技術(shù),對天線接收數(shù)據(jù)進行本征分析,將信號數(shù)據(jù)張成一個空間并對其進行分解,根據(jù)正交原理分割成信號子空間和噪聲子空間,構(gòu)造出噪聲本征矢量,利用信號子空間與噪聲子空間的正交性,在空間譜上形成極值點,從而達到對方向和速度的二維高分辨率估計。該方法應(yīng)用于相控陣?yán)走_信號檢測,可以精確地測定多普勒頻率和方位角度,提取多個空間運動目標(biāo)的二維信息。文章的最后給出了計算機模擬成像結(jié)果,驗證了算法的有效性。
-
關(guān)鍵詞:
- 雷達信號處理; 譜估計; 時-空二維信號處理
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. -
計量
- 文章訪問數(shù): 2283
- HTML全文瀏覽量: 97
- PDF下載量: 385
- 被引次數(shù): 0
下載:
