雙重不變ESPRIT
Dual invariance esprit
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摘要: ESPRIT利用了陣列在一個(gè)方向上的平移不變性,從而可估計(jì)信號(hào)的一個(gè)方向。該文利用3個(gè)相互位移的子陣列所具有的雙重不變性質(zhì),從而估計(jì)出了信號(hào)的兩個(gè)方向,并且計(jì)算量較小,兩個(gè)方向角自然配對(duì),對(duì)子陣列的內(nèi)部結(jié)構(gòu)也沒有要求,因此可以選擇適當(dāng)?shù)淖雨嚵薪Y(jié)構(gòu)以獲得良好的估計(jì)效果。
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關(guān)鍵詞:
- 波達(dá)方向估計(jì); 平移不變性
Abstract: ESPRIT can estimate one direction of signals utilizing a single shift-invariance property of the sensor array. A novel method, i.e. dual-invariance ESPRIT, is proposed in the paper which can estimate two directions of incident signals utilizing two shift-invariance properties of a special sensor array which consists of three shifted subarrays. The new method is very fast and can get naturally paired direction estimates. What is more, the subarray geometry is arbitrary so that accurate estimates can be obtained by using an appropriate subarray geometry. -
R. Roy, T. Kailath, ESPRIT-estimation of signal parameters via rotational invariance techniques,IEEE Trans. on ASSP, 1989, ASSP-37(7), 984-995.[2]殷勤業(yè),高分辨率波達(dá)方向估計(jì),[博士論文],西安,西安交通大學(xué),1989.[3]劉全等,二維虛擬ESPRIT算法,信號(hào)處理,2001,17(3),247-251.[4]Q. Liu, 2-D virtual ESPRIT algorithm, Electronics Letters, 2001, 37(16), 1052-1053.[5]M. Haardt, Eifficient One-,Two-, and Multidimensional High-Resolution Array Signal Processing,[Ph. D Thesis], Technical University of Munich, Germany, 1996.[6]C.P. Mathcws, M. D. Zoltowski, Eigenstructure techniques for 2-D angle estimation with uniform circular arrays, IEEE Trans. on SP, 1994, SP-42(9), 2395-2406.[7]T.J. Shan, M. Wax, T. Kailath, On spatial smoothing for directions-of-arrival estimation of coherent signals, IEEE Trans. on ASSP, 1985, ASSP-33(8), 806-811.[8]A.L. Swindlehurst, B. Ottersten, R. Roy, T. Kailath, Multiple invariance ESPRIT, IEEE Trans.on SP, 1992, SP-40(4), 867-881. -
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