分布式相参雷达自适应和差波束测角方法

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中图分类号：TN911.23 文献标志码：A DOI：10.12305/j.issn.1001-506X.2025.03.10

Angle measurement method for distributed coherent radar based on adaptive sum and difference beamforming

LONGJinrong1，WU Jianxin1，*，LIANG Yi² （1.Schoolof Electronicsand Communication Engineering，SunYat-sen University，Shenzhen 5180oo，China； 2.National Key LaboratoryofRadar Signal Processing，Xidian University，Xi'an71Oo71，China）

Abstract：Distributed coherent radar has obvious advantages in anti-jamming and performance of target detection.However，thegrating lobes causedby distributedconfiguration bring great dificulties to estimation of direction of arival（DOA）for target.Based on the uniform distributed coherent array，the sum and difference beamforming（SDB）method is expanded to the grating lobes region of distributed arrys，and the characteristics of angular response curve（ARC） is analyzed using double-direction method.A fuzzy resolution angle measurement method is proposed based on multi-frequency adaptive SDB（MF-ASDB）algorithm.At diferent frequencies，this method finishes scanningand detecting with the help of dense grating lobes， calculates the main fuzzy value with ASDB method，which is extended to obtain DOA ambiguity values including trueanglesof targets.Acording tothe angular ofset relationship betweenfrequenciesand periods of grating lobes， theleast squares method is used to achieve DOA fuzzy resolution.Simulation results verifythe effectiveness of the proposed method.

Keywords：direction of arrival （DOA） estimation；distributed coherent radar；adaptive sum and difference beamforming（ASDB）；multi-frequency fuzzy resolution；angular response curve（ARC）

0 引言

道输出作比值得到鉴角值，对比鉴角曲线（angularresponsecurve，ARC），得到到达方向（directionofarrival，DOA）估计值。（剩余15790字）