陣元間互耦條件下一維波達(dá)方向估計(jì)方法
Approach for direction of arrival estimation based on 1-dimensional searching in the presence of mutual coupling
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摘要: 該文在與波達(dá)方向(DOA)有關(guān)的陣元間互耦條件下,提出了一種新的自校準(zhǔn)DOA估計(jì)方法,并給出了參數(shù)可辨識(shí)性的一個(gè)必要條件。該方法利用一維DOA搜索,無需估計(jì)互耦參數(shù),避免了多維參數(shù)搜索和迭代過程。仿真實(shí)驗(yàn)結(jié)果表明,陣元間互耦參數(shù)和DOA估計(jì)存在模糊性。在其間存在互耦的陣元個(gè)數(shù)已知的條件下,可以得到正確的DOA估計(jì)結(jié)果。
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關(guān)鍵詞:
- 互耦; 波達(dá)方向估計(jì); 可辨識(shí)性; 模糊性
Abstract: By using 1-dimensional DOA searching rather than resort to multidimensional parametric searching, an algorithm for DOA estimation in the presence of mutual coupling is got. A necessary condition for identifiability is proposed. The ambiguous peaks appeared in certain cases must be eliminated. Detailed analysis of ambiguous problem is presented and is illuminated by numerical examples. -
李全力,肖先賜,空間譜估計(jì)測(cè)向系統(tǒng)信道失配的單信號(hào)源校正方法,電子學(xué)報(bào),1991,19(3),123-125[2]王學(xué)禮,李舜酩,陳仲儀,俞靖,多信號(hào)源方向和頻率估計(jì)中信道失配和陣元互耦的一次性補(bǔ)償,電子科學(xué)學(xué)刊,2000,22(1),28-34[3]姚康澤,梁甸農(nóng),模型誤差對(duì)陣列信號(hào)特征結(jié)構(gòu)的影響及一種校準(zhǔn)方法,系統(tǒng)工程及電子技術(shù),1996,18(8)44-47[4]M.Jansson,A.L.Swindlehurst,B.Ottersten,Weighted subspace fitting for general arrav error models,IEEE Trans.on Signal Processing,1998,46(9),2484-2498.[5]A.J.Veiss,A.S.Willsky,B.C.Levy,Eigenstructure approach for array processing with unknown intensity coefficients,IEEE Trans.on Signal Processing,1988,36(10),1613-1617.[6]B.Fiedlander,A.J.Weiss,Direction finding in the present of mutual coupling,IEEE Trans.on Antennas and Propagation,1991,39(3),273-284.[7]A.Fieller,A.Fereol,P.Larzabal,H.Clergeot,Robust bearing estimation in the presence of direction-dependent modeling errors: Identifiability and treatmnent,IEEE ICASSP,Detroit.MI,1995,1884-1887. -
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