Linear FM Signal Estimation Method Based on Linear Iterative Prediction
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摘要: 针对线性调频(linear frequency modulation,LFM)信号参数估计方法中参数估计范围较小的问题,以旋转求和抽取(rotate add decimate,RAD)测频方法为基础,提出了一种估计LFM信号参数范围的改进方法.该方法在保证线性调频斜率以及频率估计精度的前提下,将线性调频斜率估计范围扩展至(-π/2,π/2).给出了用线性迭代预测方法改进LFM信号参数估计范围的基本思想和步骤.最后仿真验证了该方法的有效性.Abstract: To enlarge the parameter estimation range in the algorithm for estimation of LFM (linear frequency modulation) signal parameters,and improved algorithm was proposed based on the method of rotate-add-decimate (RAD) for frequency measurement,and it was implemented with the method of linear iterative prediction.It increases the estimation range to (-π/2,π/2) on the premise of ensuring linear FM (frequency modulation) ratio and estimation precision.Simulation demonstrated the effectiveness of the algorithm.
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