多时宽线性调频脉冲信号校正数据产生方法

Method of Correction Data Generation for the MultipleTime-width LFM Pulse Signal

针对工程应用中多时宽线性调频脉冲信号校正数据产生方法复杂繁琐的问题,提出了一种基于离散希尔伯特变换、幅相误差提取和补偿技术的校正数据产生方法。该方法利用多时宽线性调频脉冲信号频谱一致性的特点,仅对多种时宽线性调频脉冲信号中最大时宽的线性调频脉冲信号进行采集,并进行离散希尔伯特变换和幅相误差提取,通过多项式曲线拟合,得到幅度包络曲线和相位误差曲线,利用这两条曲线对全部时宽的线性调频脉冲信号进行幅相误差补偿。该方法降低了多时宽线性调频脉冲信号校正数据产生的复杂度。仿真实验结果表明:使用校正数据得到的线性调频脉冲信号幅度包络平坦度和峰值旁瓣比满足雷达设备使用要求。

In view of the complex and tedious problem of generating correction data of multiple time-width line frequency modulation(LFM)pulse signal in engineering application,a method of data generation based on discrete Hilbert transform,amplitude-phase error extraction and compensation is presented.The method takes the advantages on the spectral consistency of the multiple time-width LFM pulse signal,which only collects the maximum time-width LFM pulse signal,carries out discrete Hilbert transform and amplitude-phase error extraction.The curves of amplitude envelope and phase error are obtained by polynomial curve fitting.The two curves can be used to compensate the amplitude-phase error of all time-width LFM pulse signals.The complexity of generating the correction data of multiple time-width LFM pulse signal is reduced.The simulation test results show that the amplitude envelope flatness and peak side lobe ratio(PSLR)of the LFM pulse signal,which obtained from the corrected data,meet requirements of radar equipments.