發(fā)布時(shí)間：2018-03-29 01:36

  本文選題：波達(dá)方向估計(jì)　切入點(diǎn)：寬帶信號(hào)　出處：《電波科學(xué)學(xué)報(bào)》2014年04期

【摘要】：當(dāng)陣列過載時(shí),常用高分辨測(cè)向算法將會(huì)失效.針對(duì)此問題,提出了一種新的寬帶信源測(cè)向算法.該算法利用基于最小冗余直線陣列的四階累積量來擴(kuò)展陣列孔徑.將得到的四階累積量去除冗余信息后,構(gòu)造了一新的Toeplitz矩陣.新矩陣充分利用了原協(xié)方差矩陣的信息,避免了冗余信息.通過理論分析和計(jì)算機(jī)仿真,對(duì)擴(kuò)展后陣列孔徑、測(cè)向性能、檢測(cè)概率及可分辨信源數(shù)進(jìn)行了對(duì)比研究.結(jié)果表明,相比相同陣元數(shù)的最小冗余直線陣和均勻直線陣,該算法具有大得多的陣列孔徑和更高的分辨率,利用M陣元,最多可以分辨M2-M個(gè)信源.
[Abstract]:When the array is overloaded, common high-resolution direction-finding algorithms will fail. A new wideband source direction finding algorithm is proposed, in which the fourth order cumulant based on the least redundant linear array is used to expand the aperture of the array. A new Toeplitz matrix is constructed. The new matrix makes full use of the information of the original covariance matrix and avoids redundant information. Compared with the minimum redundant linear array and uniform linear array with the same number of elements, the algorithm has much larger aperture and higher resolution. Up to 2-M sources can be identified.
【作者單位】： 重慶郵電大學(xué)移動(dòng)通信技術(shù)重慶市重點(diǎn)實(shí)驗(yàn)室;重慶郵電大學(xué)光電工程學(xué)院;
【基金】：國家高技術(shù)研究發(fā)展計(jì)劃(863計(jì)劃)重點(diǎn)項(xiàng)目(2009AA011302) 重慶郵電大學(xué)研究生教育創(chuàng)新計(jì)劃重點(diǎn)項(xiàng)目(Y201019) 重慶市教委科研項(xiàng)目(K1090513) 重慶市科委重點(diǎn)實(shí)驗(yàn)室專項(xiàng)經(jīng)費(fèi)
【分類號(hào)】：TN911.7
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本文編號(hào)：1679010