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利用LFM信号对空中目标进行一维距离成像时,目标的高速运动会导致成像模糊,需要进行运动补偿,针对一维距离像补偿中的多分量线性调频信号参数估计问题,对目标回波信号的特点进行了分析。采用一种自相关混频和瞬时测频的方法估计补偿信号的调频斜率,降低了已有参数估计算法的复杂性。仿真分析表明该算法是有效的,适合引信信号处理使用。
When using LFM signal to carry on one-dimensional distance imaging of airborne targets, high-speed target movement will result in blurred imaging and motion compensation. In order to solve the parameter estimation problem of multi-component chirp signal in one-dimensional range image compensation, the characteristics of target echo signal Analyzed. A method of auto-correlation and instantaneous frequency measurement is used to estimate the frequency modulation slope of the compensation signal, which reduces the complexity of the existing parameter estimation algorithm. Simulation results show that the algorithm is effective and suitable for fuze signal processing.