Article(id=1239165054793347153, tenantId=1146029695717560320, journalId=1238841944844054536, issueId=1239165048212476136, articleNumber=null, orderNo=null, doi=10.12347/j.ycyk.20250218003, pmid=null, cstr=32406.14.ycyk.20250218003, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1739808000000, receivedDateStr=2025-02-18, revisedDate=1742227200000, revisedDateStr=2025-03-18, acceptedDate=null, acceptedDateStr=null, onlineDate=1773369571635, onlineDateStr=2026-03-13, pubDate=1757865600000, pubDateStr=2025-09-15, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1773369571635, onlineIssueDateStr=2026-03-13, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1773369571635, creator=13701087609, updateTime=1773369571635, updator=13701087609, issue=Issue{id=1239165048212476136, tenantId=1146029695717560320, journalId=1238841944844054536, year='2025', volume='46', issue='5', pageStart='1', pageEnd='158', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1773369570067, creator=13701087609, updateTime=1773617788336, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1240206151170707811, tenantId=1146029695717560320, journalId=1238841944844054536, issueId=1239165048212476136, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1240206151170707812, tenantId=1146029695717560320, journalId=1238841944844054536, issueId=1239165048212476136, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=142, endPage=150, ext={EN=ArticleExt(id=1239165055460241517, articleId=1239165054793347153, tenantId=1146029695717560320, journalId=1238841944844054536, language=EN, title=Coherence-Resolving 2D DOA Estimation Algorithm for Two-Dimensional Composite Uniform Array Based on Spatial Smoothing, columnId=1239133500033528732, journalTitle=Journal of Telemetry, Tracking and Command, columnName=Radar and Countermeasures, runingTitle=null, highlight=null, articleAbstract=
With the increasing application demands for radar jammers, traditional array designs and direction-finding algorithms exhibit critical limitations: excessive information redundancy in uniform arrays, restricted estimation accuracy due to limited physical aperture, and significant performance degradation when processing coherent signals. To address these issues, this paper proposes a coherent signal Direction of Arrival (DOA) estimation method based on spatial smoothing preprocessing and the MUSIC algorithm, integrated with a two-dimensional composite uniform arrays. The method aims to overcome traditional array design constraints and mitigate DOA performance deterioration caused by coherent signals. Specifically, the spatial smoothing technique leverages the translational invariance property of uniform arrays to effectively solve the rank deficiency in covariance matrices induced by coherent signals. The two-dimensional composite uniform array adopts a sparse array configuration to expand the effective aperture under the same number of array elements, thereby enhancing DOA resolution. Experimental validation combines two-dimensional spatial smoothing with the MUSIC algorithm for DOA estimation of coherent signals on the composite array. Results demonstrate that the spatial smoothing method successfully suppresses coherent signal interference, while the composite array achieves superior DOA estimation performance compared to traditional uniform arrays with identical element counts, validating the effectiveness of the proposed methodology.
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随着雷达干扰机应用需求的日益增加,传统阵列设计与测向算法存在以下关键局限:均匀阵列信息冗余度过高、阵列物理孔径受限导致估计精度受限、对相干信号源处理性能显著劣化。为此,本文提出了一种基于空间平滑预处理与MUSIC(Multiple Signal Classification,多重信号分类)算法的二维复合均匀阵列相干信号DOA(Direction of Arrival,到达方向)估计方法,旨在突破传统阵列设计的限制,以及解决相干信号带来的DOA性能下降问题。具体而言,空间平滑技术利用均匀阵列的平移不变特性,有效改善相干信号引起的协方差矩阵秩亏损问题;二维复合均匀阵列通过稀疏化阵列排布,在相同阵元数量条件下扩展有效孔径,从而提升DOA估计的分辨率。在实验中,结合二维空间平滑方法和MUSIC算法,在二维复合均匀阵列上对相干信号进行DOA测向,结果表明:空间平滑方法有效抑制了相干信号的干扰,且二维复合均匀阵列较传统均匀阵列在相同阵元规模下展现出更优的DOA估计性能,验证了方法的有效性。
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王秦川 1999年生,硕士研究生。
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王秦川 1999年生,硕士研究生。
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于勇 1971年生,博士,研究员。
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于勇 1971年生,博士,研究员。
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胡继军 1981年生,硕士,研究员。
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胡继军 1981年生,硕士,研究员。
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The overall process of the 2D composite uniform array coherence-resolving DOA algorithm based on spatial smoothing, figureFileSmall=XwcntAdTCdS3ttFMClsJ6A==, figureFileBig=DLq+L5U3laIE8DGaImSNFg==, tableContent=null), ArticleFig(id=1239265689362550836, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1239165054793347153, language=CN, label=图1, caption=
基于空间平滑的二维复合均匀阵列解相干DOA算法总体流程, figureFileSmall=XwcntAdTCdS3ttFMClsJ6A==, figureFileBig=DLq+L5U3laIE8DGaImSNFg==, tableContent=null), ArticleFig(id=1239265689488379960, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1239165054793347153, language=EN, label=Fig. 2, caption=
Schematic diagram of a 2D composite uniform array structure, figureFileSmall=lMzCxd3474ewosDfEqKjkw==, figureFileBig=lUzfx2pqqp13jCUPO759rw==, tableContent=null), ArticleFig(id=1239265689572266044, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1239165054793347153, language=CN, label=图2, caption=
二维复合均匀阵列结构示意图, figureFileSmall=lMzCxd3474ewosDfEqKjkw==, figureFileBig=lUzfx2pqqp13jCUPO759rw==, tableContent=null), ArticleFig(id=1239265689656152125, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1239165054793347153, language=EN, label=Fig. 3, caption=
Example of subarray selection in the two-dimensional spatial smoothing method, figureFileSmall=RAsaDTQB1UGfsY4oOt6Wfg==, figureFileBig=Q0lQWXTMqISyMUX//qiyZA==, tableContent=null), ArticleFig(id=1239265689748426815, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1239165054793347153, language=CN, label=图3, caption=
二维空间平滑方法的子阵选取示例, figureFileSmall=RAsaDTQB1UGfsY4oOt6Wfg==, figureFileBig=Q0lQWXTMqISyMUX//qiyZA==, tableContent=null), ArticleFig(id=1239265689819729985, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1239165054793347153, language=EN, label=Fig. 4, caption=
MUSIC power spectrum for coherent dual targets using UPA with SNR = 10 dB for direction of arrival estimation, figureFileSmall=BQcvsrZCYrzyrtjOZbGjuQ==, figureFileBig=cbCFF4S/aC0yDk8TR0qTNg==, tableContent=null), ArticleFig(id=1239265689886838851, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1239165054793347153, language=CN, label=图4, caption=
相干双目标使用UPA进行测向的MUSIC功率谱(SNR=10 dB), figureFileSmall=BQcvsrZCYrzyrtjOZbGjuQ==, figureFileBig=cbCFF4S/aC0yDk8TR0qTNg==, tableContent=null), ArticleFig(id=1239265689987502149, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1239165054793347153, language=EN, label=Fig.5, caption=
MUSIC power spectrum for coherent dual targets using 2D composite uniform array for direction of arrival estimation (without spatial smoothing for decorrelation) with SNR = -10 dB, figureFileSmall=lAnHmeewtX7DkPBjqrLwLw==, figureFileBig=ETnRE+EbYZ2ZyAv4KX2pCg==, tableContent=null), ArticleFig(id=1239265690054611015, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1239165054793347153, language=CN, label=图5, caption=
相干双目标使用复合均匀面阵测向(未使用空间平滑去相干)的MUSIC功率谱(SNR=-10 dB), figureFileSmall=lAnHmeewtX7DkPBjqrLwLw==, figureFileBig=ETnRE+EbYZ2ZyAv4KX2pCg==, tableContent=null), ArticleFig(id=1239265690142691401, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1239165054793347153, language=EN, label=Fig.6, caption=
MUSIC power spectrum for coherent dual targets using 2D composite uniform array and two-dimensional spatial smoothing for direction of arrival estimation with SNR = -10 dB, figureFileSmall=TO4TRUX0iNNXKVdG/2SsYA==, figureFileBig=+eXVFeOAst/X9Zi5g75Tbw==, tableContent=null), ArticleFig(id=1239265690230771786, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1239165054793347153, language=CN, label=图6, caption=
相干双目标使用复合均匀面阵和二维空间平滑进行测向的MUSIC功率谱(SNR=-10 dB), figureFileSmall=TO4TRUX0iNNXKVdG/2SsYA==, figureFileBig=+eXVFeOAst/X9Zi5g75Tbw==, tableContent=null), ArticleFig(id=1239265691715555404, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1239165054793347153, language=EN, label=Fig. 7, caption=
Comparison of DOA estimation RMSE between traditional methods and the proposed method under different SNR conditions, figureFileSmall=cahKUjFoQy6/SMXnf3iNMQ==, figureFileBig=lH/M0TkbEYHzvHR2OOcOjA==, tableContent=null), ArticleFig(id=1239265691812024399, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1239165054793347153, language=CN, label=图7, caption=
在不同SNR条件下的传统方法与本文所使用方法的DOA测向RMSE对比, figureFileSmall=cahKUjFoQy6/SMXnf3iNMQ==, figureFileBig=lH/M0TkbEYHzvHR2OOcOjA==, tableContent=null), ArticleFig(id=1239265691954630736, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1239165054793347153, language=EN, label=Fig.8, caption=
Comparison of DOA estimation rmse between traditional methods and the proposed method under different snapshot conditions, figureFileSmall=AlJpDCDPG0cquXM5qG9yRw==, figureFileBig=PxxPtD1ix+btO2BMc6weNA==, tableContent=null), ArticleFig(id=1239265692046905427, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1239165054793347153, language=CN, label=图8, caption=
在不同快拍数条件下的传统方法与本文所使用方法的DOA测向RMSE对比, figureFileSmall=AlJpDCDPG0cquXM5qG9yRw==, figureFileBig=PxxPtD1ix+btO2BMc6weNA==, tableContent=null), ArticleFig(id=1239265692160151638, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1239165054793347153, language=EN, label=Table 1, caption=
Signal parameter setting
, figureFileSmall=null, figureFileBig=null, tableContent=
| 仿真参数 | 均匀面阵 | 复合均匀面阵 |
|---|
| 阵元数目 | 7×7=49 | M=5,N=4 共M2+N2=41 |
| 阵元间距 | λ/2 | d M=2λ,dN=2.5λ |
| 信源数目 | 2 | 2 |
| 信源频率 | 2 GHz(相干信号) | 2 GHz(相干信号) |
| 真实信源位置(方向角,俯仰角) | (90,45),(140,70) | (90,45),(140,70) |
| 信噪比 | 10 dB | -10 dB |
), ArticleFig(id=1239265692273397848, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1239165054793347153, language=CN, label=表1, caption=
信号参数设置
, figureFileSmall=null, figureFileBig=null, tableContent=
| 仿真参数 | 均匀面阵 | 复合均匀面阵 |
|---|
| 阵元数目 | 7×7=49 | M=5,N=4 共M2+N2=41 |
| 阵元间距 | λ/2 | d M=2λ,dN=2.5λ |
| 信源数目 | 2 | 2 |
| 信源频率 | 2 GHz(相干信号) | 2 GHz(相干信号) |
| 真实信源位置(方向角,俯仰角) | (90,45),(140,70) | (90,45),(140,70) |
| 信噪比 | 10 dB | -10 dB |
), ArticleFig(id=1239265692369866842, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1239165054793347153, language=EN, label=Table 2, caption=
DOA performance test signal parameter settings
, figureFileSmall=null, figureFileBig=null, tableContent=
| 仿真参数 | 均匀面阵 | 复合均匀面阵 |
|---|
| 阵元数目 | 7×7=49 | M=5,N=4 共M2+N2=41 |
| 阵元间距 |  | d M=2λ,dN=2.5λ |
| 信源数目 | 1 | 1 |
| 信源频率 | 2 GHz | 2 GHz |
| 真实信源位置(方向角,俯仰角) | (90,45) | (90,45) |
| 信噪比 | -10 dB~10 dB (步进2 dB) | -10 dB~10 dB (步进2 dB) |
| 快拍数 | 10~100(步进为10) | 10~100(步进为10) |
| 蒙特卡罗仿真次数 | 100 | 100 |
), ArticleFig(id=1239265692441170013, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1239165054793347153, language=CN, label=表2, caption=
DOA性能测试信号参数设置
, figureFileSmall=null, figureFileBig=null, tableContent=
| 仿真参数 | 均匀面阵 | 复合均匀面阵 |
|---|
| 阵元数目 | 7×7=49 | M=5,N=4 共M2+N2=41 |
| 阵元间距 |  | d M=2λ,dN=2.5λ |
| 信源数目 | 1 | 1 |
| 信源频率 | 2 GHz | 2 GHz |
| 真实信源位置(方向角,俯仰角) | (90,45) | (90,45) |
| 信噪比 | -10 dB~10 dB (步进2 dB) | -10 dB~10 dB (步进2 dB) |
| 快拍数 | 10~100(步进为10) | 10~100(步进为10) |
| 蒙特卡罗仿真次数 | 100 | 100 |
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