Based on the cognitive radar concept and the basic connotation of cognitive skywave over-the-horizon radar（SWOTHR）, the system structure and information processingmechanism about cognitive SWOTHR are researched. Amo...Based on the cognitive radar concept and the basic connotation of cognitive skywave over-the-horizon radar（SWOTHR）, the system structure and information processingmechanism about cognitive SWOTHR are researched. Amongthem, the hybrid network system architecture which is thedistributed configuration combining with the centralized cognition and its soft/hardware framework with the sense-detectionintegration are proposed, and the information processing framebased on the lens principle and its information processing flowwith receive-transmit joint adaption are designed, which buildand parse the work law for cognition and its self feedback adjustment with the lens focus model and five stages informationprocessing sequence. After that, the system simulation andthe performance analysis and comparison are provided, whichinitially proves the rationality and advantages of the proposedideas. Finally, four important development ideas of futureSWOTHR toward ＂high frequency intelligence information processing system＂ are discussed, which are scene information fusion, dynamic reconfigurable system, hierarchical and modulardesign, and sustainable development. Then the conclusion thatthe cognitive SWOTHR can cause the performance improvement is gotten.展开更多
天波超视距雷达(over the horizonradar,OTHR)通过快速傅里叶变换(fastFouriertransform,FFT)实现长时间相干积累,但这种基于目标速度恒定的方法对于机动目标的效果并不好。提出了一种基于目标运动参数估计的OTHR机动目标检测方法。该...天波超视距雷达(over the horizonradar,OTHR)通过快速傅里叶变换(fastFouriertransform,FFT)实现长时间相干积累,但这种基于目标速度恒定的方法对于机动目标的效果并不好。提出了一种基于目标运动参数估计的OTHR机动目标检测方法。该方法首先确定机动目标的运动参数的大致范围,然后对其运动参数进行估计,之后对其径向加速度进行补偿,最后对经加速度补偿后的目标信号进行相干积累并在距离 多普勒平面上进行二维恒虚警检测。仿真结果表明,该方法能够增强OTHR对机动目标的检测能力,运算效率高,实用性强。展开更多
传统的协同搜索决策方法在目标引导和机间协同方面存在不足.研究建立了基于分布概率预测的目标概率图(Target probability map,TPM)初始化方法和基于贝叶斯准则的目标概率图动态更新方法,形成了修正目标概率图(Modified TPM,MTPM)及其...传统的协同搜索决策方法在目标引导和机间协同方面存在不足.研究建立了基于分布概率预测的目标概率图(Target probability map,TPM)初始化方法和基于贝叶斯准则的目标概率图动态更新方法,形成了修正目标概率图(Modified TPM,MTPM)及其运算机理.考虑对任务子区域进行可控回访,定义了数字信息素图(Digital pheromone map,DPM),建立了数字信息素图使用方法及更新机理.设计了基于MTPM和DPM的寻优指标,建立了基于滚动时域控制的协同搜索决策方法(MTPM-DPM-RHC method,MDR).仿真表明:1)MTPM能有效降低对目标的虚警率和漏检率;2)DPM能有效实现对任务区域可控回访;3)MDR方法的遍历能力、重访能力和目标搜索效率均优于已有方法.展开更多
基金supported by the National Natural Science Foundation of China(61471391)the China Postdoctoral Science Foundation(2013M542541)
文摘Based on the cognitive radar concept and the basic connotation of cognitive skywave over-the-horizon radar（SWOTHR）, the system structure and information processingmechanism about cognitive SWOTHR are researched. Amongthem, the hybrid network system architecture which is thedistributed configuration combining with the centralized cognition and its soft/hardware framework with the sense-detectionintegration are proposed, and the information processing framebased on the lens principle and its information processing flowwith receive-transmit joint adaption are designed, which buildand parse the work law for cognition and its self feedback adjustment with the lens focus model and five stages informationprocessing sequence. After that, the system simulation andthe performance analysis and comparison are provided, whichinitially proves the rationality and advantages of the proposedideas. Finally, four important development ideas of futureSWOTHR toward ＂high frequency intelligence information processing system＂ are discussed, which are scene information fusion, dynamic reconfigurable system, hierarchical and modulardesign, and sustainable development. Then the conclusion thatthe cognitive SWOTHR can cause the performance improvement is gotten.
文摘天波超视距雷达(over the horizonradar,OTHR)通过快速傅里叶变换(fastFouriertransform,FFT)实现长时间相干积累,但这种基于目标速度恒定的方法对于机动目标的效果并不好。提出了一种基于目标运动参数估计的OTHR机动目标检测方法。该方法首先确定机动目标的运动参数的大致范围,然后对其运动参数进行估计,之后对其径向加速度进行补偿,最后对经加速度补偿后的目标信号进行相干积累并在距离 多普勒平面上进行二维恒虚警检测。仿真结果表明,该方法能够增强OTHR对机动目标的检测能力,运算效率高,实用性强。
