The study of Butterworth adaptive filter based payload current filter

The article proposed an approach which is based on adaptive filter theory that can remove base band power from payload to get expected current.IIR(infinite impulse response) digital filter structure is also introduced in the paper.And a structure design for direct II type adaptive filter is also provided.A 3-step butterworth low pass digital filter is also designed as simulator in the simulation test for the performance of the adaptive filter.Simulation and mold building in Matlab environment proves that this adaptive filter can effectively get expected current from mixture of expected current and base band payload current.The effective and efficiency of this adaptive filter is proved.