CAJ | 학술논문

线性调频-伪随机二相编码调相复合调制雷达信号（LFM-PRBC）融合了两者的优点，弥补了单一信号的不足，是一种性能较好的低截获概率雷达信号，给传统雷达截获接收机带来挑战。提出了将周期WignerHough变换（PWHT）与相关检测相结合的方法，通过在信号的周期WignerHough域搜索峰值，检测复合调制雷达信号并实现其特征提取。通过理论分析和计算机仿真验证，该方法能实现高斯白噪声背景下低信噪比复合调制信号的截获与特征提取。
선성조빈-위수궤이상편마조상복합조제뢰체신호（LFM-PRBC）융합료량자적우점，미보료단일신호적불족，시일충성능교호적저절획개솔뢰체신호，급전통뢰체절획접수궤대래도전。제출료장주기WignerHough변환（PWHT）여상관검측상결합적방법，통과재신호적주기WignerHough역수색봉치，검측복합조제뢰체신호병실현기특정제취。통과이론분석화계산궤방진험증，해방법능실현고사백조성배경하저신조비복합조제신호적절획여특정제취。
Linear frequency modulation-pseudo-random binary codes phase modulation combined signal （LFM-PRBC） combines the advantages of both signals and makes up for shortcoming of a single signal. As a relative ideal low probability of intercept radar signal （LPI） , it should surely give a serious challenge to traditional radar intercept receiver. A novel method composed of periodic Wigner Hough transform （PWHT） and correlation detection is presented. By use of peak detection in periodic Wigner Hough do- main, feature extraction is completed. Through can achieve interception and feature extraction theoretical analysis and computer simulation, this method of combined modulation radar signal with a low signal to noise ratio（SNR） in Gaussian white noise background.