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基于杂波和噪声联合稀疏特性的直接数据域STAP方法

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系统工程与电子技术 2024年第9期46卷 2980-2987页

作者：汪亚龙王嘉恒李军何勤何子述电子科技大学信息与通信工程学院四川成都611731

针对机载预警雷达空时自适应处理(space-time adaptive processing,STAP)所面临的异构杂波环境,基于杂波和噪声的联合稀疏特性提出了一种直接数据域(direct data domain,D3)STAP方法。首先通过子孔径平滑技术扩充训练样本集合;然后基于... 详细信息

针对机载预警雷达空时自适应处理(space-time adaptive processing,STAP)所面临的异构杂波环境,基于杂波和噪声的联合稀疏特性提出了一种直接数据域(direct data domain,D3)STAP方法。首先通过子孔径平滑技术扩充训练样本集合;然后基于杂波谱二阶表征理论构造STAP功率字典矩阵、导出目标函数,并解得待检测单元信号的空时功率谱;最后根据杂波先验信息重构无孔径损失的杂波加噪声协方差矩阵。数值实验验证了所提方法的协方差矩阵估计精度高于传统的稀疏恢复D3-STAP算法,且在理想情况和存在阵列误差的情况下,所提方法皆具备更好的低速目标检测性能。

关键词：空时自适应处理直接数据域联合稀疏特性杂波谱二阶表征

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基于二重帕累托理论的共形极化阵同时发射多波束动态组阵

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电波科学学报 2024年第3期39卷 465-483页

作者：付小川谢菊兰何子述电子科技大学成都611731

共形极化阵列各阵元的各向不一致性使得波束形成须根据波束指向进行组阵才能获得较好的功率增益合成。当阵列进行同时波束形成时如何通过组阵使得各波束性能都较好,复用阵元的归属是一个难点。针对这一问题,提出了一种基于二重帕累托理... 详细信息

共形极化阵列各阵元的各向不一致性使得波束形成须根据波束指向进行组阵才能获得较好的功率增益合成。当阵列进行同时波束形成时如何通过组阵使得各波束性能都较好,复用阵元的归属是一个难点。针对这一问题,提出了一种基于二重帕累托理论的同时发射多波束动态组阵(simultaneous multi-beam dynamic array formation base on dual Pareto theory,SMDAF-DP)算法。该算法首先将基于帕累托最优理论的多目标粒子群优化(multi-objective particle swarm optimization,MOPSO)算法应用于共形极化阵,分别对每个波束指向进行组阵获得优选阵列;然后,针对各波束优选阵列中的复用阵元分配问题,提出了一种基于帕累托最优理论的多元粒子群优化(multivariate particle swarm optimization,MPSO)算法,通过实数优化的方式判断粒子位置,确定复用阵元最终的归属;最后,考虑波束指向分布疏散和密集的情况,对算法进行仿真验证。仿真结果表明:相较于现有算法,本文所提算法在保证阵元不复用的基础上能使各个波束形成更优的发射方向图。此外,在波束指向较为密集的情况下本文所提算法相比于现有算法仍具有更优越的性能,具有一定的稳健性。

关键词：共形极化阵列同时发射多波束动态组阵帕累托最优理论复用阵元多目标优化多元粒子群优化(MPSO)

一种高多普勒容限的抗间歇采样转发干扰波形设计算法

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现代雷达 2024年第2期46卷 123-130页

作者：李绽蕾何金阳程子扬何子述电子科技大学信息与通信工程学院四川成都611731

间歇采样转发干扰(ISRJ)是一种能有效欺骗相干雷达的有源干扰,尤其针对线性调频雷达,回波信号经过脉冲压缩能够产生一系列的虚假目标。为对抗这类干扰,同时考虑到动目标场景下对波形的高多普勒容限要求,文中首先提出了一种基于模糊函数... 详细信息

间歇采样转发干扰(ISRJ)是一种能有效欺骗相干雷达的有源干扰,尤其针对线性调频雷达,回波信号经过脉冲压缩能够产生一系列的虚假目标。为对抗这类干扰,同时考虑到动目标场景下对波形的高多普勒容限要求,文中首先提出了一种基于模糊函数理论的波形设计方法。然后,在提前认知干扰信号的基础上,以理想化设计波形的相关函数为目标建立了优化模型,并考虑了波形的恒模约束。由于所形成的问题是个非凸问题,因此提出了一种交替循环算法迭代求解该问题。最后,通过仿真验证了所提方法的有效性,所设计波形具有较高的多普勒容限,同时能够有效对抗ISRJ干扰,当干扰认知存在一定偏差时文中方法具有稳健性。

关键词：模糊函数多普勒容限间歇采样转发干扰恒模波形设计循环算法

Doppler radar by using single multicarrier pulse based on optical fibre delay lines

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Journal of Systems Engineering and Electronics 2010年第3期21卷 404-407页

作者： Junqi Duan zishu he National Information Control Laboratory Chengdu 610036 P. R. China Department of Electronic Engineering University of Electronic Science and Technology of China Chengdu 610054 P. R. China

The proposed Doppler measurement technique shows that the Doppler measurements can be accomplished by a single pulse with multiple frequency components through optical fibre delay *** and velocity ambiguity can be removed,and the velocity resolution can be improved dramatically by using long optical fibre delay ***,the velocity resolution can be modified by adjusting the length of optical fibre delay *** addition,the proposed radar can achieve high range resolution by using a single wideband *** a result,the new approach can improve radar performance significantly.

关键词： Doppler radar matched filters optical delay lines radar signal processing radar system velocity measurement.

Detection of weak target for MIMO radar based on Hough transform

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Journal of Systems Engineering and Electronics 2009年第1期20卷 76-80页

作者： Zeng Jiankui he zishu School of Electronic Engineering Univ. of Electronic Science and Technology of China Chengdu 610054 P. R. China

An effective method of multiple input multiple output （MIMO） radar weak target detection is proposed based on the Hough transform. The detection time duration is divided into multiple coherent processing intervals （CPIs）. Within each CPI, conventional methods such as fast Fourier transform （FFT） is exploit to coherent inte- grating in same range cell. Furthermore, noncoherent integration through several range cells can be implemented by Hough transform among all CPIs. Thus, higher integration gain can be obtained. Simulation results are also given to demonstrate that the detection performance of weak moving target can be dramatically improved.

关键词： MIMO radar weak target detection Hough transform noncoherent integration.

Dwell scheduling algorithm for multifunction phased array radars based on the scheduling gain

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Journal of Systems Engineering and Electronics 2008年第3期19卷 479-485页

作者： Cheng Ting he zishu Tang Ting School of Electronic Engineering Univ. of Electronic Science and Technology Chengdu 610054 P. R. China

A real-time dwell scheduling model, which takes the time and energy constraints into account is founded from the viewpoint of scheduling gain. Scheduling design is turned into a nonlinear programming procedure. The real-time dwell scheduling algorithm based on the scheduling gain is presented with the help of two heuristic rules. The simulation results demonstrate that compared with the conventional adaptive scheduling method, the algorithm proposed not only increases the scheduling gain and the time utility but also decreases the task drop rate.

关键词： multifunction phased array radar dwell scheduling pulse interleaving time and energy constraint.

MIMO radar dwell scheduling based on novel pulse interleaving technique

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Journal of Systems Engineering and Electronics 2013年第2期24卷 234-241页

作者： Ting Cheng Wenwen Liao zishu he School of Electronic Engineering University of Electronic Science and Technology of China

According to the signal processing characteristic of MIMO radars,an adaptive dwell scheduling algorithm is *** is based on a novel pulse interleaving technique,which makes full use of transmitting,waiting and receiving durations of radar *** utilization of transmitting duration is unique for MIMO radars and is realized through transmitting duration *** results show that,compared with the conventional scheduling algorithm,the scheduling performance of MIMO radars can be improved effectively by the proposed algorithm,and the scheduling rule can be chosen arbitrarily when using the proposed algorithm.

关键词： multiple input multiple output(MIMO) radar dwell scheduling pulse interleaving time constraint energy constraint

Novel radar dwell scheduling algorithm based on pulse interleaving

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Journal of Systems Engineering and Electronics 2009年第2期20卷 247-253页

作者： Cheng Ting he zishu Tang Ting School of Electronic Engineering Univ. of Electronic Science and Technology Chengdu 610054 P. R. China

The problem of scheduling radar dwells in multifunction phased array radar systems is addressed. A novel dwell scheduling algorithm is proposed. The whole scheduling process is based on an online pulse interleaving technique. It takes the system timing and energy constraints into account. In order to adapt the dynamic task load, the algorithm considers both the priorities and deadlines of tasks. The simulation results demonstrate that compared with the conventional adaptive dwell scheduling algorithm, the proposed one can improve the task drop rate and system resource utility effectively.

关键词： dwell scheduling pulse interleaving energy constraint priority deadline

Bayesian track-before-detect algorithm for nonstationary sea clutter

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Journal of Systems Engineering and Electronics 2021年第6期32卷 1338-1344页

作者： XU Cong he zishu LIU Haicheng LI Yadan Department of Information and Communication University of Electronic Science and Technology of ChinaChengdu 610051China Department of Electrical and Information Engineering Heilongjiang Institute of EngineeringHarbin 150026China College of Economics and Management University of Chinese Academy of SciencesBeijing 100049China

Radar detection of small targets in sea clutter is a particularly demanding task because of the nonstationary characteristic of sea *** track-before-detect(TBD)filter is an effective way to increase the signal-to-clutter ratio(SCR),thus improving the detection performance of small targets in sea *** cope with the nonstationary characteristic of sea clutter,an easily-implemented Bayesian TBD filter with adaptive detection threshold is proposed and a new parameter estimation method is devised which is integrated into the detection *** detection threshold is set according to the parameter estimation result under the framework of information *** detection of closely spaced targets,those within the same range cell as the one under test are treated as contribution to sea clutter,and a successive elimination method is adopted to detect *** results prove the effectiveness of the proposed algorithm in detecting small targets in nonstationary sea clutter,especially closely spaced ones.

关键词： small target track-before-detect(TBD) nonstationary sea clutter closely spaced target