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National Science Open 2024年第5期3卷 36-52页

作者： Xinyuan Liu Shunjun Wei Wei Pu Xiang Cai Yanbo Wen Shisheng Guo lingjiang kong Xiaoling Zhang School of Information and Communication Engineering University of Electronic Science and Technology of ChinaChengdu 611731China

Non-line-of-sight(NLOS)imaging is a novel radar sensing technology that enables the reconstruction of hidden ***,it may suffer from synthetic aperture length reduction caused by ambient *** this study,a complex total variation(CTV)regularization-based sparse reconstruction method for NLOS three-dimensional(3-D)imaging by millimeter-wave(mm W)radar,named RM-CSTV method,is proposed to improve imaging quality and *** this scheme,the NLOS imaging model is first introduced,and associated geometric constraints for NLOS objects are ***,an effective high-resolution NLOS imaging method based on the range migration(RM)kernel and complex sparse joint total variation constraint,dubbed as modified RM-CSTV,is proposed for 3-D high-resolution imaging with edge *** experiments with multi-type NLOS targets show that the proposed RM-CSTV method can provide effective and high-resolution NLOS targets 3-D imaging.

关键词： NLOS imaging 3-D-SAR 3-D imaging sparse reconstruction

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乙烯“三机”控制系统改造后的操作方式探讨

乙烯工业 2024年第1期36卷 51-54,I0002页

作者：孔令江中国石油化工股份有限公司天津分公司天津300271

简述乙烯装置“三机”控制系统改造的内容、目的,介绍了改造后的新系统的操作条件和操作步骤,新系统以保护机组、防喘振为中心,三组超速保护、机组状态监护、机组联锁保护(紧急停车系统)结合汇集于1套ITCC系统中,为生产运行提供了安全... 详细信息

简述乙烯装置“三机”控制系统改造的内容、目的,介绍了改造后的新系统的操作条件和操作步骤,新系统以保护机组、防喘振为中心,三组超速保护、机组状态监护、机组联锁保护(紧急停车系统)结合汇集于1套ITCC系统中,为生产运行提供了安全、可靠的操作平台。使得“三机”控制系统性能得到提升,功能进一步完善,降低了操作负荷,在整合在一起的操作界面上实现对机组的全面控制和操作,提高了操作效率。

关键词：压缩机控制系统 ITCC 模块联锁状态

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多径利用雷达目标探测技术综述与展望

雷达学报（中英文） 2024年第1期13卷 23-45页

作者：孔令讲郭世盛陈家辉吴佩仑崔国龙电子科技大学信息与通信工程学院成都611731

多径利用雷达(MER)目标探测技术主要基于电磁波在介质表面的反射、衍射等非直视(NLOS)多路径传播特性,实现对城市街角、车辆遮挡等“视觉”盲区内隐蔽目标的有效探测,其能够为城市作战、智能驾驶等多种应用提供服务,具有重要的现实意义... 详细信息

多径利用雷达(MER)目标探测技术主要基于电磁波在介质表面的反射、衍射等非直视(NLOS)多路径传播特性,实现对城市街角、车辆遮挡等“视觉”盲区内隐蔽目标的有效探测,其能够为城市作战、智能驾驶等多种应用提供服务,具有重要的现实意义和研究价值。为获知该领域的发展脉络,并预测未来可能的发展趋势,该文对21世纪初以来该领域国内外公开文献进行了归纳总结。相关文献的梳理结果表明,根据探测平台类型的不同,多径利用雷达目标探测技术目前主要包括两类:基于空中平台的多径探测技术和基于地面平台的多径探测技术。这两类技术均已取得一定具有实际意义的研究成果。针对空中平台,该文围绕可行性验证、影响因素分析、建筑环境感知和非视距目标探测4个方面展开梳理;针对地面平台,该文则从目标检测与识别、目标二维定位、目标三维信息获取及新型探测方法4个方面展开论述。最后,对多径利用雷达目标探测技术进行总结和展望,指出该技术在目前实际应用中所面临的潜在问题和挑战。这些结果表明,多径利用雷达目标探测技术正朝着多样化、智能化的方向发展。

关键词：城市遮蔽环境非直视(NLOS) 多径利用雷达(MER) 目标探测未来发展

动平台分布式雷达系统动目标低比特数据检测算法

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雷达学报（中英文） 2024年第3期13卷 584-600页

作者：杨诗兴张国鑫梁雲飞易伟孔令讲电子科技大学信息与通信工程学院成都611731

动平台分布式雷达系统可有效提升系统的生存能力和探测性能,但运动平台之间通常采用无线传输方式,难以配备大通信带宽以传输完整的信号数据,给雷达系统的高性能检测带来极大挑战。由于低比特量化技术可显著降低分布式系统的通信传输代... 详细信息

动平台分布式雷达系统可有效提升系统的生存能力和探测性能,但运动平台之间通常采用无线传输方式,难以配备大通信带宽以传输完整的信号数据,给雷达系统的高性能检测带来极大挑战。由于低比特量化技术可显著降低分布式系统的通信传输代价和计算资源消耗,该文针对低信噪比弱信号环境下提出了动平台分布式雷达系统的低比特量化运动目标检测算法。首先,根据系统资源将各节点的多脉冲观测数据选择对应位数的低比特量化器进行量化,推导了关于量化器和多个目标状态的似然函数。其次,证明了低比特量化数据对应似然函数关于未知目标反射系数的凸性,并基于该特性设计了多普勒频移和反射系数的联合估计器。然后,针对探测区域中存在的多个状态未知目标设计了多目标检测器,推导了其恒虚警率门限。最后,通过推导系统的渐近性能设计了最优低比特量化器,在保证系统鲁棒性的同时有效提升了系统的检测性能。仿真实验分析了所提算法的检测与估计性能,结果证明了所提算法在低信噪比弱信号环境下的有效性,同时表明低比特量化数据可在仅占用低于20%通信带宽的基础上实现接近高精度(16比特量化)数据对应的检测和估计性能,且2比特量化策略可作为检测性能和雷达系统资源消耗的折中选择。

关键词：分布式雷达系统运动平台目标检测低比特量化最优量化器

A cellular automaton model for a bridge traffic bottleneck

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Acta Mechanica Sinica 2005年第3期21卷 305-309页

作者： Shifa Xiao lingjiang kong Muren Liu College of Physics & Information Engineering Guangxi Normal University Guilin 541004 China

A cellular automaton （CA） model is proposed in this paper to analyze a bridge traffic bottleneck. The simulation results with this model show that there are several phase transitions in the traffic average density, velocity and flow for each lane under a periodic boundary condition. An unstable phase in the traffic average density and velocity for the upstream and downstream lanes of the bridge is shown in a range of initial traffic densities. The critical points of the phase transitions and the phenomenon of the unstable phase found in the simulation are also explained with the mean-field theory.

关键词： Traffic flow Cellular automata model Bridge-bottleneck Phase transition Unstable phase

CP-based MIMO OFDM radar IRCI free range reconstruction using real orthogonal designs

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Science China(Information Sciences) 2017年第2期60卷 40-48页

作者： Tianxian ZHANG Xiang-Gen XIA lingjiang kong The School of Electronic Engineering University of Electronic Science and Technology of China The Department of Electrical and Computer Engineering University of Delaware

In this paper, we propose a range reconstruction method for a frequency-band shared multipleinput multiple-output(MIMO) orthogonal frequency-division multiplexing(OFDM) radar with sufficient cyclic prefix(CP) by using real orthogonal designs. Compared with the application of complex orthogonal designs in our previous work, the application of real orthogonal designs can significantly reduce the number of the all-zero-valued pulses in a coherent processing interval(CPI) for each transmitter and increase the efficiency of radar transmitters. Meanwhile, it still maintains the advantages of full spatial diversity without inter-range-cell interference(IRCI). We also apply the rate-1 real orthogonal designs for different numbers of transmitters and pulses for range reconstruction without any idleness of radar transmitters. Simulation results are presented to illustrate the performances of the OFDM pulse design and the CP-based MIMO OFDM radar using real orthogonal designs.

关键词： cyclic prefix(CP) inter-range-cell interference(IRCI) multiple-input multiple-output(MIMO) radar real orthogonal designs orthogonal frequency division multiplexing(OFDM) pulse

Adaptive detector design of MIMO radar with unknown covariance matrix

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Journal of Systems Engineering and Electronics 2010年第6期21卷 954-960页

作者： lingjiang kong Guolong Cui Xiaobo Yang Jianyu Yang School of Electronic Engineering University of Electronic Science and Technology of China Chengdu 611731 P. R. China

The problem of detecting signal with multiple input mul-tiple output （MIMO） radar in correlated Gaussian clutter dominated scenario with unknown covariance matrix is dealt with. The gen-eral MIMO model, with widely separated sub-arrays and co-located antennas at each sub-array, is adopted. Firstly, the generalized likelihood ratio test （GLRT） with known covariance matrix is ob-tained, and then the Rao and Wald detectors are devised, which have proved that the Rao and Wald test coincide with GLRT detec-tor. To make the detectors fully adaptive, the secondary data with signal-free will be collected to estimate the covariance. The per-formance of the proposed detector is analyzed, however, it is just ancillary. A thorough performance assessment by several numer-ical examples is also given, which has considered the sense with co-located antennas configure of transmitters and receivers array. The results show that the performance the proposed adaptive de-tector is better than LJ-GLRT, and the loss can be acceptable in comparison to their non-adaptive counterparts.

关键词： MIMO radar generalized likelihood ratio test Rao and Wald tests correlated Gaussian clutter fully adaptive.

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分布式多基无源雷达信号级协同目标定位技术

现代雷达 2024年第9期46卷 64-78页

作者：周其玉易伟袁野丁建江孔令讲杨建宇电子科技大学信息与通信工程学院四川成都611731 空军预警学院湖北武汉430019

利用空间已有电磁信号,采取分布式无源协同探测手段对目标进行零功率静默侦察,可有效提升我方雷达的低截获和抗干扰性能,是多雷达协同探测技术领域重点发展方向之一。目前,无源协同定位主要面临着目标回波弱、非合作外辐射源参数未知、... 详细信息

利用空间已有电磁信号,采取分布式无源协同探测手段对目标进行零功率静默侦察,可有效提升我方雷达的低截获和抗干扰性能,是多雷达协同探测技术领域重点发展方向之一。目前,无源协同定位主要面临着目标回波弱、非合作外辐射源参数未知、直达径干扰等挑战。针对上述问题,文中提出了一种分布式多基无源协同的信号级高精度目标定位方法。该方法通过联合多基无源雷达双通道接收信号,建立信号级目标位置估计问题,以实现联合直达波干扰抑制和外辐射源及目标位置高精度估计,形成分布式多基无源雷达的零功率静默协同探测能力。此外,采用序贯估计策略和交替迭代估计策略将高维估计问题降低为多个低维估计问题,以降低算法的计算复杂度,强化实时定位能力。仿真结果表明,相较传统数据级定位,所提信号级方法在低信噪比和直达波干扰环境中表现出更好的定位性能。该无源协同定位方法可用于无人机前突静默侦察、反低空突防、反隐身等探测场景,能显著提升对敌目标的监视和打击效果。

关键词：无源雷达协同探测直接定位直达波干扰

Non-LOS target localization via millimeter-wave automotive radar

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Journal of Systems Engineering and Electronics 2023年第5期34卷 1171-1181页

作者： LIU Zhaoyu ZHANG Wenli ZHENG Jingyue GUO Shisheng CUI Guolong kong lingjiang LIANG Kun School of Information and Communication Engineering University of Electronic Science and Technology of ChinaChengdu 611731China School of Intelligent Engineering Zhengzhou University of AeronauticsZhengzhou 450046China

This paper considers the non-line-of-sight(NLOS)vehicle localization problem by using millimeter-wave(MMW)automotive *** preliminary attempts for NLOS vehicle detection are carried out and achieve good ***,an electromagnetic(EM)wave NLOS multipath propagation model for vehicle scene is ***,with the help of available multipath echoes,a complete NLOS vehicle localiza-tion algorithm is ***,simulation and experimental results validate the effectiveness of the established EM wave propagation model and the proposed NLOS vehicle localization algorithm.

关键词： millimeter-wave(MMW)automotive radar multipath propagation model non-line-of-sight(NLOS)vehicle localization