A New Adaptive Lifting Scheme and Its Applying to Fault Current Denoising

摘要

In this paper, a new adaptive lifting wavelet transform scheme is proposed. The main idea of the scheme is that the choice of predicting operator is triggered by local gradient information of the signal. Such an adaptive scheme can adapt itself well to the analyzed signal, and both the smooth properties and the sharp transition characteristics of the signal can be reserved perfectly by using this adaptive lifting wavelet transform. Simulation examples illustrate that the new scheme is effective.