宽频程电侦阵列设计与二维DOA估计方法
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摘要
在宽频程条件下,针对传统均匀阵列无法实现大角度范围内目标参数无模糊估计问题,提出宽频程电侦阵列设计及二维波达方向估计方法。该方法首先将平行互质阵列在垂直方向上扩展为双平行互质阵列;然后分别对两平行互质阵列进行虚拟阵列扩展,利用虚拟均匀线阵对目标来波方向余弦分量进行估计;最后采用方向余弦解模糊算法对模糊余弦分量进行解模糊处理,实现多目标角度参数的高精度无模糊估计。相对于传统宽频程阵列测向算法而言,所提方法无需参数配对,可实现宽频程范围内多目标参数的高精度无模糊估计。仿真实验验证了所提方法的有效性。
Focus on the issue that it is impossible for the traditional uniform array to achieve the unambiguous direction finding in a wide angular range under the wideband condition,an approach for wideband electronic intelligence(ELINT)array optimized design and two dimensional direction of arrival(DOA)estimation is proposed.Firstly,the double parallel co-prime array is designed by vertical extension on the parallel coprime array.Then,two uniform virtual arrays are developed respectively,and the cosine components of the direction of arrival are estimated.Finally,the ambiguity resolution algorithm is applied to obtain the unambiguous cosine components,and the unambiguous angles of the multiple emitters are achieved with high accuracy.Compared with traditional algorithms,the proposed method can get the direction finding of multiple sources without ambiguity and the operation of direction pairing.The validity of the proposed method is verified by the simulation results.
Focus on the issue that it is impossible for the traditional uniform array to achieve the unambiguous direction finding in a wide angular range under the wideband condition,an approach for wideband electronic intelligence(ELINT)array optimized design and two dimensional direction of arrival(DOA)estimation is proposed.Firstly,the double parallel co-prime array is designed by vertical extension on the parallel coprime array.Then,two uniform virtual arrays are developed respectively,and the cosine components of the direction of arrival are estimated.Finally,the ambiguity resolution algorithm is applied to obtain the unambiguous cosine components,and the unambiguous angles of the multiple emitters are achieved with high accuracy.Compared with traditional algorithms,the proposed method can get the direction finding of multiple sources without ambiguity and the operation of direction pairing.The validity of the proposed method is verified by the simulation results.
引文
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[2]ZHONG J N,ALWAN E A,VOLAKIS J L.Ultra-wideband dual-linear polarized phased array with 60°scanning for simultaneous transmit and receive systems[C]∥Proc.of the International Workshop on Antenna Technology:Small Antennas,Innovative Structures,and Applications(iWAT),2017:140-141.
[3]KRISHNA R G,PUNNIAMOORTHY D,KAMADAL V S,et al.Wideband four arm log-periodic planar antenna with Wi-Fi band rejection[C]∥Proc.of the International Conference on Sensing,Signal Processing and Security(ICSSS),2017:308-312.
[4]YU X J,LIANG M,XIN H.Performance evaluation of wideband microwave direction-of-arrival estimation using Luneburg lens[J].IEEE Antennas and Wireless Propagation Letters,2017,16:2453-2456.
[5]曲志昱,司锡才.基于虚拟基线的宽带被动导引头测向算法[J].弹箭与制导学报,2007,27(4):92-95.QU Z Y,SI X C.Direction finding method of wideband passive radar seeker based on virtual baseline[J].Journal of Projectiles,Rockets,Missiles and Guidance,2007,27(4):92-95.
[6]司伟建,初萍,孙圣和.超宽频带测向解模糊方法研究[J].弹箭与制导学报,2009,29(2):45-48.SI W J,CHU P,SUN S H.Study on the methods of solving direction finding ambiguity in very wide band[J].Journal of Projectiles,Rockets,Missiles and Guidance,2009,29(2):45-48.
[7]张亮,徐振海,熊子源,等.基于圆阵干涉仪的被动导引头宽带测向方法[J].系统工程与电子技术,2012,34(3):462-466.ZHANG L,XU Z H,XIONG Z Y,et al.Wideband direction finding method of passive radar seeker based on circular array phase interferometer[J].Systems Engineering and Electronics,2012,34(3):462-466.
[8]WEBER R J,HUANG Y K.A wideband circular array for frequency and 2Dangle estimation[C]∥Proc.of the IEEE Aerospace Conference,2010:1-8.
[9]ZHAO M,CHEN H,WANG J,et al.Novel frequency and DOA estimation with sub-Nyquist spatio-temporal sampling[J].Journal of Computational Information Systems,2013,9(16):6677-6683.
[10]CHEN H,CONG W S,ZHAO M.The DOA estimation withspatial sub-Nyquist sampling based on an auxiliary sensor[C]∥Proc.of the International Conference on Intelligent Control&Information Processing,2014:5-8.
[11]PAL P,VAIDYANATHAN P P.Coprime sampling and the MUSIC algorithm[C]∥Proc.of the IEEE Digital Signal Processing Workshop and IEEE Signal Processing Education Workshop,2011:289-294.
[12]QIN S,ZHANG Y D,AMIN M G.Generalized coprime array configurations for direction-of arrival estimation[J].IEEE Trans.on Signal Processing,2015,63(6):1377-1390.
[13]CHENG Z F,ZHAO Y B,LI H,et al.Two-dimensional DOA estimation algorithm with co-prime array via sparse representation[J].Electronics Letters,2015,51(25):2084-2086.
[14]冯明月,何明浩,郁春来,等.基于双平行互质阵列的二维高精度DOA估计[J].系统工程与电子技术,2017,39(5):977-983.FENG M Y,HE M H,YU C L,et al.2D-DOA estimation with high accuracy using double parallel co-prime array[J].Systems Engineering and Electronics,2017,39(5):977-983.
[15]HAARDT M,NOSSEK J A.Unitary ESPRIT:how to obtain increased estimation accuracy with a reduced computation burden[J].IEEE Trans.on Signal Processing,1995,43(5):1232-1242.