Special estimation algorithm of AR model

Distortion will happen when normal signal is disturbed or interfered. The system resulting in signal distortion can be estimated in signal processing way. In order to overcome the defect of ordinary method of estimating the system model by FFT analysis, two algorithms are proposed in this paper, one is AR model estimate method by pole cancellation, another is AR model estimation method based on linear forecast analysis. The simulation results show that, compared with the shortcomings of the ordinary FFT method, the two algorithms can get the system model with distinguished feature and certain order.