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小樣本下基于改進(jìn)的直接數(shù)據(jù)域方法的DOA估計(jì)方法

解虎,  黨紅杏,  譚小敏,  馮大政

解虎, 黨紅杏, 譚小敏, 馮大政. 小樣本下基于改進(jìn)的直接數(shù)據(jù)域方法的DOA估計(jì)方法[J]. 電子與信息學(xué)報(bào), 2016, 38(9): 2371-2376. doi: 10.11999/JEIT151398
引用本文: 解虎, 黨紅杏, 譚小敏, 馮大政. 小樣本下基于改進(jìn)的直接數(shù)據(jù)域方法的DOA估計(jì)方法[J]. 電子與信息學(xué)報(bào), 2016, 38(9): 2371-2376. doi: 10.11999/JEIT151398
XIE Hu, DANG Hongxing, TAN Xiaomin, FENG Dazheng. DOA Estimation Based on the Improved Direct Data Domain Method with One Sample[J]. Journal of Electronics & Information Technology, 2016, 38(9): 2371-2376. doi: 10.11999/JEIT151398
Citation: XIE Hu, DANG Hongxing, TAN Xiaomin, FENG Dazheng. DOA Estimation Based on the Improved Direct Data Domain Method with One Sample[J]. Journal of Electronics & Information Technology, 2016, 38(9): 2371-2376. doi: 10.11999/JEIT151398

小樣本下基于改進(jìn)的直接數(shù)據(jù)域方法的DOA估計(jì)方法

doi: 10.11999/JEIT151398 cstr: 32379.14.JEIT151398
  • 2.

    (中國空間技術(shù)研究院西安分院 西安 710100) ②(西安電子科技大學(xué)雷達(dá)信號處理國家重點(diǎn)實(shí)驗(yàn)室 西安 710071)

DOA Estimation Based on the Improved Direct Data Domain Method with One Sample

  • 2.

    (Xi&rsquo

  • 摘要: 針對小樣本甚至單個(gè)樣本情況下，大部分高分辨DOA估計(jì)方法性能下降，不能對臨近目標(biāo)有效分辨的問題，該文提出一種新的基于直接數(shù)據(jù)域技術(shù)的DOA估計(jì)方法，基本思想是通過損失空域自由度達(dá)到提高時(shí)域樣本的目的。首先對陣列進(jìn)行劃分，構(gòu)造多個(gè)新的低維數(shù)據(jù)矢量，其次利用遠(yuǎn)場窄帶信號的復(fù)包絡(luò)在陣列的各個(gè)陣元上的幅度響應(yīng)是近似相同的特點(diǎn)，構(gòu)造新的約束。實(shí)驗(yàn)表明，在小樣本下該文算法DOA的分辨能力優(yōu)于傳統(tǒng)直接數(shù)據(jù)域方法。
    Abstract: Many of the high-resolution Direction Of Arrival (DOA) estimation methods fail to estimate the DOAs of incoming signals and distinguish the two close signals under small sample support; especially only one snapshot is available. To handle this problem, a novel DOA method based on improved Direct Data Domain (D3) technique is proposed. The basic ideal of the proposed method is to augment the time domain samples by sacrificing the space domain degree. Firstly, by splitting the entire array into many overlapping sub-array, many low-dimension samples can be obtained. Secondly, utilizing the property of far-filed narrowband signal that its amplitude response on each array is the same, a new constraint is imposed. Experimental results indicate that the resolution of the propsed method is superior to the conventional algorithms.
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出版歷程
  • 收稿日期:  2015-12-09
  • 修回日期:  2016-05-27
  • 刊出日期:  2016-09-19

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