基于Windows的雷达系统操控软件的设计与实现

结合可视化编程技术,在Windows操作系统下设计并实现了基于Visualc＋＋的雷达系统操控软件,完成了雷达操控界面的目标图像显示功能,并通过网络传输等方式与其它分机实现通讯,在实际应用中证明了该设计实现的有效性。     

相控阵雷达仿真系统并行计算研究

针对共享存储多处理器的集群环境,研究了减少相控阵雷达仿真系统运行时间的并行计算方法.根据相控阵雷达多个波束处理过程的相对独立性和信号处理仿真中多个距离单元采样点的计算特点,提出了一种粗粒度消息传递接口(MPI)分布式内存和细粒度OpenMP共享内存混合编程的两级并行方法.实验结果表明,并行计算使系统的仿真速度有较大提高.     

天气雷达系统信息接收处理中心项目设计体会

对于汕头气象局多普勒雷达系统信息接收处理综合楼的建筑方案,结构设计难点及处理方法的体会。     

Long term integration of radar signals with unknown Doppler shift for ubiquitous radar

Ubiquitous radar is a new radar system that provides continuous and uninterrupted multifunction capability within a coverage volume. Continuous coverage from close-in "pop-up" targets in clutter to long-range targets impacts selection of waveform parameters. The coherent processing interval (CPI) must be long enough to achieve a certain signal-to-noise ratio (SNR) that ensures the efficiency of detection. The condition of detection in the case of low SNR is analyzed, and three different cases that would occur during integration are discussed and a method to determine the CPI is presented. The simulation results show that targets detection with SNR as low as -26 dB in the experimental system can possibly determine the CPI.     

Polyphase orthogonal sequences design for opportunistic array radar via HGA

Opportunistic array radar (OAR) is a new generation radar system based on the stealth of the platform, which can improve the modern radar performance effectively. Designing the orthogonal code sets with low autocorrelation and cross-correlation is a key issue for OAR. This paper proposes a novel hybrid genetic algorithm (HGA) and designs the polyphase orthogonal code sets with low autocorrelation and cross-correlation properties, which can be used in the OAR system. The novel algorithm combines with simulated annealing (SA) and genetic algorithm (GA), adds in keeping best individuals and competition in small scope, and introduces grey correlation evaluation to evaluate fitness function. These avoid the premature convergence problem existed in GA and enhance the global searching capability. At last, the genetic results are optimized to obtain the best solution by using greedy algorithm. The simulation results show that the proposed algorithm is effective for the design of orthogonal phase signals used in OAR systems.     

双(多)基地天气雷达技术及其应用

近年来 ,利用双 (多 )基地天气雷达系统进行天气探测受到重视 ,我国用双 (多 )基地天气雷达系统进行天气探测基本上还处于起步阶段。简述了双 (多 )基地天气雷达系统的构成及性能特点 ,分析了它的探测原理 ,给出了它与单基天气雷达网探测结果比较。通过讨论说明了用双 (多 )基地天气雷达系统进行天气探测是有效的和实用的 ,有广泛的应用前景 ,特别对我国在经费有限的情况下尽快获取真实三维风场等天气信息有重大意义     

应用于激光雷达系统的光学相控阵技术研究进展

综述了应用于激光雷达系统的光学相控阵技术的研究进展,介绍了相控阵激光雷达的发展现状;重点介绍了基于不同电光材料的光学相控阵技术的发展,其中包括LiNbO3电光晶体材料,AlGaAs光波导材料,PLZT电光晶体材料以及液晶材料.     

穿墙雷达系统中信号检测的新算法

针对冲击体制穿墙雷达系统中回波信号结构复杂、信噪比低、信号检测困难等问题,提出一种小波-双谱联合检测新算法.在对穿墙雷达回波信号建模的基础上,用联合算法将非相干累积后的回波信号经过小波包变换提高信噪比,再用双谱算法进行信号检测.实验结果验证了新算法的有效性,能提供比单独使用其中任一算法更高的检测精度.该算法能反映墙壁后物体的距离-方位信息,为穿墙雷达系统成像提供了可能.     

雷达系统发现与跟踪目标仿真元模型方法

雷达系统仿真模型复杂、计算量大,是导弹攻防对抗仿真实验复杂度的主要组成部分。为了降低仿真实验的复杂度,依据雷达系统工作原理,为雷达系统仿真模型构建了四种形式的元模型:线性元模型、多项式元模型、径向基函数元模型和Krging元模型。通过实验比较看出,二阶多项式元模型具有拟合精度高、计算速度快、模型简洁等特点。在攻防对抗仿真中用它代替雷达系统仿真模型,可以大大提高仿真实验的效率。     

测风激光雷达合肥“诞生”

合肥科学岛上的安光所利用地基多普勒测风激光雷达进行的水平风场观测实验取得成功，意味着我国在解决航空领域低空风切变检测难题取得了关键性突破。近日该雷达系统正式通过专家验收，标志着国内首台米散射多普勒测风激光雷达在肥“诞生”。