相位量化DRFM欺骗干扰的自适应检测

Adaptive Detection of Phase Quantized DRFM Deception Jamming

为了从环境中检测出相位量化数字射频存储器(Digital radio frequency memory,DRFM)欺骗干扰的存在,本文设计了一种能够在均匀环境中检测出噪声、干扰或回波信号的自适应检测器。检测过程分为两步:先由基于广义似然比检测(Generalized likelihood ratio test,GLRT)的自适应匹配滤波(Adaptive matched filter,AMF)检测器完成噪声和"信号"(滤波后的回波信号或干扰)的检测;再从回波信号和干扰导引矢量间的差异性出发重新设计检测器,以甄别回波信号或干扰。最后,通过理论推导和蒙特卡洛试验对检测器的性能进行分析和评估,并与透视检测器进行比较。仿真结果表明,在低相位量化位数和高信噪比的条件下,所设计的检测器能够正确检测出干扰信号的存在。

To detect the phase quantized digital radio frequency memory（DRFM）deception jamming in realistic radar scenarios,an adaptive detector for detecting noise,jamming or echo signal in homogeneous environments is designed.Firstly noise or″signal″（filtered echo signal or jamming）,is detected through adaptive matched filter（AMF）detector based on generalized likelihood ratio test（GLRT）.Then the difference between two space-time steering vectors of echo signal and jamming is used to redesign the detector to discriminate the echo signal or the jamming.The detector performance is assessed and analyzed through Monte Carlo simulation and theory deriation,which is compared with clairvoyant detector.Simulation results show that the detector can correctly detect the jamming signal under conditions of low quantization bits and high signal-to-noise（SNR）.