线性调频信号参数快速估计

针对采用线性调频(linearfrequencymodulation,LFM)信号体制的参数估计的应用场合,提出了一种消除最大似然估计时带来旁瓣的算法。该算法利用雷达回波信号的对称性上来获取统计样本,因而在无需对雷达系统作任何改进的情况下,可获得对LFM信号参数较好的估计。通过结合解线调估计运算量少的特点,有效地减少了估计的运算量,提高了估计精度。给出了应用该方法的具体步骤,通过仿真实验证明该算法的有效性。

Fast estimation of linear frequency modulated signal parameters

It is described to estimate parameters of linear frequency modulated(LFM) signal, based on taking statistical samples used for analyzing parameters of LFM signal with symmetry, a new method is brought forward to eliminate side lobe arise from maximum likelihood estimation. It is no special requirement for the radar system. With fast method of dechirp, the computation of estimating parameters may not only be reduced but also the precision improved. Then,the chart diagram of arithmetic and procedures of signal processing are given. Finally, an example of data simulation demonstrates the effectiveness of this approach.