Noncoherent integration is often ed for approving performance in detection of radar signal. Order-statistics constant false alarm rate (OS-CFAR) detector has some advantages in clutter and multiple target situations. ...Noncoherent integration is often ed for approving performance in detection of radar signal. Order-statistics constant false alarm rate (OS-CFAR) detector has some advantages in clutter and multiple target situations. AnOS-CFAN detector with noncoherent integration after Square law envelope detector is presented and an analysis of detection performance for the chi-Square family of Swerling fluctuating targets is given. Its application to the high frequency(HF) ground wave over-the-horizon (OTH) radar is discussed as well.展开更多
he cell averaging and the order statistics are two typical algorithms for constant false alarm rate detector in radar system. They have different advantages in stationary noise background and fluctuation clutter envir...he cell averaging and the order statistics are two typical algorithms for constant false alarm rate detector in radar system. They have different advantages in stationary noise background and fluctuation clutter environment respectively. This paper presents a doublethreshold constant false alarm rate detector constructed on the basis of synthesizing the advantages of the two algorithms above and avioding their disadvantages. The performance of the detector is analyzed, and the simulation result is given.展开更多
现代雷达采用宽带线性调频、相位编码等低截获概率(low probability of interception,LPI)波形,发射功率较低,到达侦察接收机的辐射源信号信噪比较低,给被动侦察带来了巨大的挑战。现有的被动检测方法在检测该类信号时,存在一定的局限性...现代雷达采用宽带线性调频、相位编码等低截获概率(low probability of interception,LPI)波形,发射功率较低,到达侦察接收机的辐射源信号信噪比较低,给被动侦察带来了巨大的挑战。现有的被动检测方法在检测该类信号时,存在一定的局限性,比如算法复杂度高、计算量大和实时性较差等。针对上述问题,提出了一种辐射源信号检测方法。在数字信道化预处理的基础上,设计了适合在工程实现的并行流水线结构,基于顺序统计滤波和二元积累完成检测,提高了检测速度,能够实现对低信噪比信号的恒虚警(constant false alarm rate,CFAR)检测。仿真试验证明了所提方法的有效性和正确性,为辐射源信号检测提供了有力的理论支撑。展开更多
文摘Noncoherent integration is often ed for approving performance in detection of radar signal. Order-statistics constant false alarm rate (OS-CFAR) detector has some advantages in clutter and multiple target situations. AnOS-CFAN detector with noncoherent integration after Square law envelope detector is presented and an analysis of detection performance for the chi-Square family of Swerling fluctuating targets is given. Its application to the high frequency(HF) ground wave over-the-horizon (OTH) radar is discussed as well.
文摘he cell averaging and the order statistics are two typical algorithms for constant false alarm rate detector in radar system. They have different advantages in stationary noise background and fluctuation clutter environment respectively. This paper presents a doublethreshold constant false alarm rate detector constructed on the basis of synthesizing the advantages of the two algorithms above and avioding their disadvantages. The performance of the detector is analyzed, and the simulation result is given.
文摘现代雷达采用宽带线性调频、相位编码等低截获概率(low probability of interception,LPI)波形,发射功率较低,到达侦察接收机的辐射源信号信噪比较低,给被动侦察带来了巨大的挑战。现有的被动检测方法在检测该类信号时,存在一定的局限性,比如算法复杂度高、计算量大和实时性较差等。针对上述问题,提出了一种辐射源信号检测方法。在数字信道化预处理的基础上,设计了适合在工程实现的并行流水线结构,基于顺序统计滤波和二元积累完成检测,提高了检测速度,能够实现对低信噪比信号的恒虚警(constant false alarm rate,CFAR)检测。仿真试验证明了所提方法的有效性和正确性,为辐射源信号检测提供了有力的理论支撑。
