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Chinese Journal of Aeronautics 2024年第5期37卷 349-362页

作者： Zhengjie LI Yujie WEI junwei xie Haowei ZHANG Yu TIAN Air and Missile Defense College Air Force Engineering UniversityXi’an 710051China Air Force Xi’an Flying College Xi’an 710300China Air and Missile Defense Institute Air Force Research InstituteBeijing 100085China School of Economics and Management Beihang UniversityBeijing 100191China

This paper investigates the problem of Joint Radar Node Selection and Power Allocation(JRNSPA)in the Multiple Radar System(MRS)in the blanket jamming *** radar node independently tracks moving target and subsequently transmits the raw observation data to the fusion center,which formulates a centralized tracking network *** order to establish a practical blanket jamming environment,we suppose that each target carries the self-defense jammer which automatically implements blanket jamming to the radar nodes that exceed the preset interception ***,the Predicted Conditional Cramer-Rao Lower Bound(PC-CRLB)is derived and utilized as the tracking accuracy *** at ensuring both the tracking performance and the Low Probability of Intercept(LPI)performance,the resource-saving scheduling model is formulated to minimize the transmit power consumption while meeting the requirements of tracking ***,the Modified Zoutendijk Method Of Feasible Directions(MZMFD)-based two-stage solution technique is adopted to solve the formulated non-convex optimization *** results show the effectiveness of the proposed JRNSPA scheme.

关键词： Multiple Radar System(MRS) Centralized target tracking Resource scheduling Blanket jamming Low Probability of Intercept(LPI)

Experimental results of a magnetic field modification to the radio frequency driver of a negative ion source

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Plasma Science and Technology 2024年第4期26卷 162-167页

作者：谢俊炜谢亚红韦江龙梁立振彭旭峰杨宇雯顾玉明胡纯栋谢远来 Institute of Plasma Physics Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031People’s Republic of China University of Science and Technology of China Hefei 230026People’s Republic of China

A magnetic field produced by a current flowing through the plasma grid(PG) is one of the solutions to reduce the collisional loss of negative ions in a negative ion source, which reduces the electron temperature in front of the PG. However, the magnetic field diffused into the driver has some influence on the plasma outflowing. In order to investigate the effect of changing this magnetic field on the outflowing of plasma from the driver, a circular ring(absorber) of high permeability iron has been introduced at the driver exit, which can reduce the magnetic field around it and improve plasma outflowing. With the application of the absorber, the electron density is increased by about 35%, and the extraction current measured from the extraction grid is increased from 1.02 A to 1.29 A. The results of the extraction experiment with cesium injection show that both the extraction grid(EG) current and H-current are increased when the absorber is introduced.

关键词： neutral beam injection negative ion source magnetic filter radio frequency ion source

一种防空服务质量模型下的集中式多输入多输出雷达三维机动跟踪功率分配方法

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兵工学报 2024年第4期45卷 1321-1331页

作者：李正杰陈红印谢军伟张浩为刘斌中国空气动力研究与发展中心高速空气动力研究所四川绵阳621000 空军研究院北京100085 空军工程大学防空反导学院陕西西安710051 国防大学联合作战学院北京100091

针对防空作战中现有多功能雷达功率资源利用率低的问题,提出一种基于服务质量(Quanlity of Service,QoS)模型的三维机动跟踪功率分配方法以差异化标准提升多目标跟踪性能。将目标三维机动模型建立为自适应当前统计模型,通过将加速度协... 详细信息

针对防空作战中现有多功能雷达功率资源利用率低的问题,提出一种基于服务质量(Quanlity of Service,QoS)模型的三维机动跟踪功率分配方法以差异化标准提升多目标跟踪性能。将目标三维机动模型建立为自适应当前统计模型,通过将加速度协方差与估计误差协方差矩阵相关联以实现自适应调整。在此基础上,对三维跟踪下的贝叶斯克拉美罗下界进行推导,并将其作为跟踪误差衡量指标。通过构建关于目标威胁度与期望跟踪精度的函数关系,建立防空QoS模型下的闭环功率优化分配机制。证明所构建功率优化分配模型是凸优化问题,并进一步转化为半正定规划问题进行求解。仿真结果表明,相对于传统功率分配方法,所提方法能显著提高全局跟踪效能。

关键词：集中式多输入多输出雷达功率分配三维机动跟踪防空作战凸优化

维普期刊数据库博看期刊

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基于准对称性的超宽带八端口和差器设计

微波学报 2024年第3期40卷 46-52页

作者：黄洁瑜谢军伟张旭春空军工程大学防空反导学院西安710051

和差器在雷达领域具有广泛的应用。文中首先对八端口和差器的工作原理进行了介绍,同时提出了端口准对称性的新概念,并进行了理论分析和论证。在端口准对称性的基础上提出一种超宽带八端口和差器的整体设计方案,使多个设计参数简化为一... 详细信息

和差器在雷达领域具有广泛的应用。文中首先对八端口和差器的工作原理进行了介绍,同时提出了端口准对称性的新概念,并进行了理论分析和论证。在端口准对称性的基础上提出一种超宽带八端口和差器的整体设计方案,使多个设计参数简化为一个设计参数,极大地简化了八端口和差器的设计。实际加工了一款基于双面平行带线的超宽带八端口和差器,中心频率为3 GHz,工作频率为1.5 GHz~4.5 GHz(-10 dB以下),相对带宽为100%,相位误差在±4°以内。测试结果与仿真结果和理论分析结果相符,验证了所提理论的正确性。

关键词：端口准对称性八端口和差器整体设计方案 HFSS仿真

Joint target assignment and power allocation in the netted C-MIMO radar when tracking multi-targets in the presence of self-defense blanket jamming

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Defence Technology（防务技术） 2023年第6期24卷 414-427页

作者： Zhengjie Li junwei xie Haowei Zhang Jiahao xie Air and Missile Defense College Air Force Engineering UniversityXi'an 710051China Space Engineering University of Strategic Support Force Beijing 101416China

The netted radar system(NRS)has been proved to possess unique advantages in anti-jamming and improving target tracking *** resource management can greatly ensure the combat capability of the *** this paper,based on the netted collocated multiple input multiple output(CMIMO)radar,an effective joint target assignment and power allocation(JTAPA)strategy for tracking multi-targets under self-defense blanket jamming is *** architecture based on the distributed fusion is used in the radar network to estimate target state *** deriving the predicted conditional Cramer-Rao lower bound(PC-CRLB)based on the obtained state estimation information,the objective function is *** maximize the worst case tracking accuracy,the proposed JTAPA strategy implements an online target assignment and power allocation of all active nodes,subject to some resource *** the formulated JTAPA is non-convex,we propose an efficient two-step solution *** terms of the simulation results,the proposed algorithm can effectively improve tracking performance in the worst case.

关键词： Netted radar system MIMO Target assignment Power allocation Multi-targets tracking Self-defense blanket jamming

Adaptive transmit beamspace optimization design based on RD-log-FDA radar

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Journal of Systems Engineering and Electronics 2022年第1期33卷 91-96页

作者： DING Zihang xie junwei LI Zhengjie Air and Missile Defense College Air Force Engineering UniversityXi’an 710051China

Because of the range-angle dependency in random log frequency diverse array(RD-log-FDA) radar, a method for designing beamspace transformation matrix in angle and range based on the receive signal has been *** is demonstrated that the designed beamspace transformation matrix basically meets the requirements of beam ***, there are some problems in the transformation matrix designed, such as unstable beam gain and high ***, we propose an optimization method by adjusting array element spacing and random number in frequency offset to get the optimum beam ***, particle swarm optimization(PSO) is used to find the optimal *** beam gain comparison before and after the optimization is obtained by simulation, and the results show that the optimized array after beamspace preprocessing has more stable beam gain, lower sidelobe, and higher resolution in parameter *** conclusion, the RD-log-FDA is capable of forming desired beam gain in angle and distance through beamspace preprocessing, and suppressing interference signals in other areas.

关键词： beamspace random log frequency diverse array(RD-log-FDA) transformation matrix particle swarm optimization(PSO)

Beamforming analysis based on CSB sin-FDA

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Journal of Systems Engineering and Electronics 2020年第1期31卷 73-84页

作者： WANG Bo xie junwei ZHANG Jing ZHANG Haowei Air and Missile Defense College Air Force Engineering UniversityXi’an 710051China Highway Railway College Shaanxi Vocational and Technical College of TransportXi’an 710018China

This paper studies the adaptive beamforming algorithm based on the frequency diverse array(FDA)array where the interference is located at the same angle(but different range)with the *** take the cross subarray-based FDA with sinusoidal frequency offset(CSB sin-FDA)as the receiving array instead of the basic *** sampling covariance matrix under insufficient snapshot can be corrected by the automatic diagonal loading *** the basis of decomposing the mismatched steering vector error into a vertical component and a parallel one,this paper searches the vertical component of the error by the quadratic constraint *** numerical simulation verifies that the beamformer based on the CSB sin-FDA can effectively hold the mainlobe at the target position when the snapshot is insufficient or the steering vector is mismatched.

关键词： receiving processing architectures minimum variance distortionless response(MVDR)beamformer cross subarraybased frequency diverse array with sinusoidal frequency offset(CSB sin-FDA) steering vector snapshots

Dot-shaped beamforming analysis based on OSB log-FDA

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Journal of Systems Engineering and Electronics 2020年第2期31卷 312-320页

The range and angle information of the frequency diverse array(FDA) cannot be exclusively determined at the output of the array because of the range-angle coupled transmit beampattern. The best decoupling approach is to form a dot-shaped beampattern rather than the S-shaped beampattern of the basic *** the degradation of the output signal-to-interferenceplus-noise ratio(SINR) caused by the coupled beampattern, we propose a dot-shaped beamforming method based on the analyzed overlapping subarray-based using a logarithmic offset and a subarray-based planar FDA using a logarithmically increasing frequency offset, with elements transmitting at multiple frequencies. Several simulation results demonstrate the effectiveness of the proposed method in transmit energy focusing, sidelobe suppression and array resolution.

关键词： subarray-based frequency diverse array(SB FDA) planar frequency diverse array(PFDA) decoupling dot-shaped beamforming

Method to reconnoiter pulse amplitude train for phased array radar based on Hausdorff distance

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Journal of Systems Engineering and Electronics 2017年第6期28卷 1089-1097页

作者： Chuan Sheng Yongshun Zhang Wenlong Lu junwei xie Air and Missile Defense College Air Force Engineering University Xi’an 710051 China

This paper presents a method to estimate beam pointing of phased array radar by the pulse amplitude train, which is significant in radar electronic reconnaissance and electronic support measure. Firstly, the antenna patterns modeling of the phased array system is exploited to build the radar sweeping model and the signal propagation model. Secondly, the relationship between the variation of the radiated power and the antenna beam pointing angles in the given airspace is analyzed. Based on the above two points, the sample with obvious amplitude characteristics of the pulse amplitude train can be screened out after detecting the train peaks. Finally, the sample is matched to the subsequent pulse amplitude train based on the Hausdorff distance. The proposed methods have less prior knowledge and higher efficiency and are easier to process. By cross correlating the sample of the pulse amplitude train with the sample data of the antenna follow-up radiation, the probability of detection of the beam pointing direction becomes larger in case that the subsequent antenna beam returns to the specific position.

关键词： beam pointing estimation antenna pattern pulse am plitude train Hausdorff distance

Antenna selection in MIMO radar with collocated antennas

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Journal of Systems Engineering and Electronics 2019年第6期30卷 1119-1131页

作者： ZHANG Haowei xie junwei SHI Junpeng ZHANG Zhaojian Air and Missile Defense College Air Force Engineering UniversityXi’an 710051China Electromagnetic Countermeasure College National University of Defense TechnologyHefei 230031China Air Force Early Warning Academy of the PLA Wuhan 410039China

An antenna adjustment strategy is developed for the target tracking problem in the collocated multiple-input multipleoutput(MIMO)*** basic technique of this strategy is to optimally allocate antennas by the prior information in the tracking recursive period,with the objective of enhancing the worst-case estimate precision of multiple *** account of the posterior Cramer-Rao lower bound(PCRLB)offering a quantitative measure for target tracking accuracy,the PCRLB of joint direction-of-arrival(DOA)and Doppler is derived and utilized as the optimization *** is shown that the dynamic antenna selection problem is NP-hard,and an efficient technique which combines convex relaxation with local search is put forward as the *** results demonstrate the outperformance of the proposed strategy to the fixed antenna configuration and heuristic search ***,it is able to offer close-to performance of the exhaustive search method.

关键词： collocated multiple-input multiple-output(MIMO)radar multi-target tracking antenna selection posterior Cramer Rao lower bound(PCRLB) direction-of-arrival(DOA).