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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)

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

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

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

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

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

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

Parameterized time-frequency analysis to separate multi-radar signals

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Journal of Systems Engineering and Electronics 2017年第3期28卷 493-502页

作者： Wenlong Lu junwei xie Heming Wang Chuan Sheng Air and Missile Defense College Air Force Engineering UniversityXi’an 710051China

Multi-radar signal separation is a critical process in modern reconnaissance systems. However, the complicated battlefield is typically confronted with increasing electronic equipment and complex radar waveforms. The intercepted signal is difficult to separate with conventional parameters because of severe overlapping in both time and frequency domains. On the contrary, time-frequency analysis maps the 1D signal into a 2D time-frequency plane, which provides a better insight into the signal than traditional methods. Particularly, the parameterized time-frequency analysis (PTFA) shows great potential in processing such non stationary signals. Five procedures for the PTFA are proposed to separate the overlapped multi-radar signal, including initiation, instantaneous frequency estimation with PTFA, signal demodulation, signal separation with adaptive filter and signal recovery. The proposed method is verified with both simulated and real signals, which shows good performance in the application on multi-radar signal separation.

关键词： intercepted multi-radar signal parameterized time-frequency analysis demodulation adaptive filtering

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).

Cognate pulse sorting method based on beam missions characteristics

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Journal of Systems Engineering and Electronics 2016年第6期27卷 1183-1190页

作者： Wenlong Lu junwei xie Heming Wang Chuan Sheng Air and Missile Defense College Air Force Engineering University

In most multi-function phased array radar applications, multiple missions, including airspace searching and target tracking, are usually performed simultaneously by the digital beam-forming technique and the time dividing method. This paper presents a novel method to classify pulses of different missions from an interleaved pulse sequence emitted by the same radar, which is significant in radar electronic reconnaissance and electronic support measure. Firstly, two hypotheses, i.e., pulse relativity within the same mission and pulse independence among different missions, are proposed by analyzing the antenna pattern and the beam scheduling method of the phased array radar. Based on the above two hypotheses, an optimal model for pulse classification is exploited with pulse amplitude series, where the absolute-value sum of second order difference is taken as the optimal kernel to measure sequence smooth continuity. Finally, several pieces of sequences under different numbers of missions and tracking data rates are simulated for algorithm verification. The simulation results show that the long data length and the high data rate will increase classification efficiency due to the validity of the two hypotheses in sufficient pulse amplitude sequence.

关键词： optimal model pulse classification relativity and independence multi-function phased array radar

Finite sensor selection algorithm in distributed MIMO radar for joint target tracking and detection

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Journal of Systems Engineering and Electronics 2020年第2期31卷 290-302页

作者： ZHANG Haowei xie junwei GE Jiaang ZHANG Zhaojian LU Wenlong Air and Missile Defense College Air Force Engineering UniversityXi’an 710051China Air Force Early Warning Academy of the PLA Wuhan 410039China Unit 95899 of the PLA Beijing 100085China

Due to the requirement of anti-interception and the limitation of processing capability of the fusion center, the subarray selection is very important for the distributed multiple-input multiple-output(MIMO) radar system, especially in the hostile environment. In such conditions, an efficient subarray selection strategy is proposed for MIMO radar performing tasks of target tracking and detection. The goal of the proposed strategy is to minimize the worst-case predicted posterior Cramer-Rao lower bound(PCRLB) while maximizing the detection probability for a certain region. It is shown that the subarray selection problem is NP-hard, and a modified particle swarm optimization(MPSO) algorithm is developed as the solution strategy. A large number of simulations verify that the MPSO can provide close performance to the exhaustive search(ES) algorithm. Furthermore, the MPSO has the advantages of simpler structure and lower computational complexity than the multi-start local search algorithm.

关键词： distributed multiple-input multiple-output(MIMO)radar subarray selection target tracking target detection particle swarm optimization(PSO)

Resource-saving scheduling scheme for centralized target tracking in multiple radar system under automatic blanket jamming

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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)