空军预警学院学报
空軍預警學院學報
공군예경학원학보
Journal of Air Force Radar Academy
2015年
4期
255-257
,共3页
微多普勒%时频分析%时间分段%WVD方法%自回归模型
微多普勒%時頻分析%時間分段%WVD方法%自迴歸模型
미다보륵%시빈분석%시간분단%WVD방법%자회귀모형
micro-Doppler%time-frequency analysis%time slicing%Winger-Ville distribution (WVD) method%autoregressive (AR) model
鉴于反导雷达需要同时保持对多个目标的跟踪而不能对同一目标进行较长时间的连续观测问题,提出了一种基于时间分段数据的时频分析方法。该方法不直接求取理想时间信号,而是结合双线性插值和AR估计求取理想时间信号的相关函数,并以Winger-Ville分布(WVD)方法得到时频图。仿真结果表明,该方法精度高于时域线性插值方法。
鑒于反導雷達需要同時保持對多箇目標的跟蹤而不能對同一目標進行較長時間的連續觀測問題,提齣瞭一種基于時間分段數據的時頻分析方法。該方法不直接求取理想時間信號,而是結閤雙線性插值和AR估計求取理想時間信號的相關函數,併以Winger-Ville分佈(WVD)方法得到時頻圖。倣真結果錶明,該方法精度高于時域線性插值方法。
감우반도뢰체수요동시보지대다개목표적근종이불능대동일목표진행교장시간적련속관측문제,제출료일충기우시간분단수거적시빈분석방법。해방법불직접구취이상시간신호,이시결합쌍선성삽치화AR고계구취이상시간신호적상관함수,병이Winger-Ville분포(WVD)방법득도시빈도。방진결과표명,해방법정도고우시역선성삽치방법。
As the anti-missile radar is required for keeping the tracking to those multiple targets, simultane-ously rather than the longer for continuously observing the same one target, this paper presents a method for time-frequency analysis based on time slicing data. In this scheme, the ideal time signals are not directly got, while the correlation function of the ideal time signals is acquired by integrating the bilinear interpolation and AR estimation, and the time-frequency graph is obtained by using the WVD method. Simulation results indicate that the proposed method’s precision is higher that the time-domain linear interpolation method’s.