CAJ | 학술논문

转发干扰是实现线性调频脉冲欺骗干扰的重要技术，中心频偏、脉宽和频率变化斜率是干扰信号的3个因子。当3个因子均存在偏差时，该文分别从时域和频域研究了转发干扰的欺骗效果。重点分析了与雷达检测干噪比密切相关的3个参数：脉宽损耗、峰值功率损耗和峰值时延。分析表明，基于群延迟的时域快速估计和基于频谱分析的频域严密推导，得到上述3个参数的数学表达式，它们高度相似。该文在此基础上进行了MATLAB仿真验证，证明这些数学表达式可适用于简化一般意义下的转发干扰分析。
전발간우시실현선성조빈맥충기편간우적중요기술，중심빈편、맥관화빈솔변화사솔시간우신호적3개인자。당3개인자균존재편차시，해문분별종시역화빈역연구료전발간우적기편효과。중점분석료여뢰체검측간조비밀절상관적3개삼수：맥관손모、봉치공솔손모화봉치시연。분석표명，기우군연지적시역쾌속고계화기우빈보분석적빈역엄밀추도，득도상술3개삼수적수학표체식，타문고도상사。해문재차기출상진행료MATLAB방진험증，증명저사수학표체식가괄용우간화일반의의하적전발간우분석。
Repeater jamming is an important trend of deception jamming against Linear Frequency Modulation (LFM) radar, and repeater jamming waveform is determined by three factors:carrier frequency offset, pulse width and linear frequency modulation rate. When there are simultaneous deviations of these factors, the deception effect of repeater jamming is studied separately in time domain and frequency domain. Three important parameters about Jamming to Noise Ratio (JNR) are derived especially, which are pulse width losses, peak power losses and peak time delay. Theoretical analysis shows that the fast estimation by a group delay in time domain for the formulas of these parameters is in accordance with the detailed deduction by spectrum analysis in frequency domain, and the corresponding MATLAB simulations are provided. So the analysis of the general jamming can be simplified by these formulas.