The influence and the elimination of ringing in the detection of VLP s with band pass filtering was studied. We used bidirectional digital filtering,minimum phase shift digital filtering, and FIR digital filtering to compare the influence of ringing on VLP’s and various ringing elimination methods. Based on the confirm action of the ringing effect of the traditional bidirectional filtering. We demonstrated that the minimum phase shift filtering is also an effective method both theoretical and practical vi...
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