CAJ | 학술논문

介绍了弹道导弹运动目标特征提取和雷达识别的研究概况,针对锥顶不动、进动角固定的匀速进动锥形弹头目标,对其典型运动进行建模,给出了回波的解析表达式,利用数值解的方法,对回波信号进行了频谱分析和时频分析,提取了频谱调制特征和微RCS特征,使用Wigner-Ville分布峰值检测法,提取了回波信号的微多普勒特征,给出了使用雷达微动特征识别弹道导弹弹头的途径.最后给出了回波信号时频分布、微多普勒、多普勒谱和微RCS的仿真结果,证明了理论分析的正确性.
개소료탄도도탄운동목표특정제취화뢰체식별적연구개황,침대추정불동、진동각고정적균속진동추형탄두목표,대기전형운동진행건모,급출료회파적해석표체식,이용수치해적방법,대회파신호진행료빈보분석화시빈분석,제취료빈보조제특정화미RCS특정,사용Wigner-Ville분포봉치검측법,제취료회파신호적미다보륵특정,급출료사용뢰체미동특정식별탄도도탄탄두적도경.최후급출료회파신호시빈분포、미다보륵、다보륵보화미RCS적방진결과,증명료이론분석적정학성.
The research status of ballistic missile target motion feature extraction and radar recognition is introduced.Then,a typical motion model is set up for a cone-shaped ballistic missile warhead target with uniform preeessing rate,steady prcessing ansle and stationary cone tip.An analytic expression of the echo from the target is proposed.Fourier transform and time-frequency transform are used to analyze the echo signal by means of numeric method.Based on above mentioned analysis,spectrum and microRCS of echo signal are acquired.Peak search method in wigner-ville distribution is used to extract micro-Doppler feature.Means based on radar feature induced by micro-motion arc proposed for ballistic missile target recognition.Finally,simulation results are provided for time-frequency distribution of echo signal,micro-Doppler,spectrum modulation and micro-RCS,which prove the validity of the theoreticM analysis.