CAJ | 학술논문

基于某捷变频雷达实测数据特点，提出了快速估计直达波参数的方法及流程，即通过分段自相关方法粗略估计脉冲到达时间和脉宽，再与精确的脉宽模板匹配，获得脉宽的精确值。用解线调的方法精确估计带宽、粗略估计载频，再与精确的载频模板匹配，获得载频的精确值。利用精确的脉宽、载频、带宽，用匹配滤波的方法精确估计脉冲到达时间，进而实现系统时频同步。仿真结果表明，文中提出的时频同步方法精度高、计算量小，适合实际工程应用。
기우모첩변빈뢰체실측수거특점，제출료쾌속고계직체파삼수적방법급류정，즉통과분단자상관방법조략고계맥충도체시간화맥관，재여정학적맥관모판필배，획득맥관적정학치。용해선조적방법정학고계대관、조략고계재빈，재여정학적재빈모판필배，획득재빈적정학치。이용정학적맥관、재빈、대관，용필배려파적방법정학고계맥충도체시간，진이실현계통시빈동보。방진결과표명，문중제출적시빈동보방법정도고、계산량소，괄합실제공정응용。
Based on the real data characteristics of a frequency agile radar,the algorithms for estimating parameters of the direct-path signals are presented in this paper.Firstly,in order to estimate time of arrival (TOA)and pulse width(PW),segment autocorrelation method is researched.Accurate PW is obtained by matching with the PW template.Secondly,on the basis of de-chirp method,accurate bandwidth(BW)and rough carrier frequency(CF)are achieved.Then,according to the CF template,the accurate CF is estimated.Finally,the accurate TOA is achieved by using matched filtering method.The simulation results show that the proposed method is highly accurate and computationally efficient.It is suitable for practical applications.