A Removal of Power Line Interference in Signal Based on Improved Nonnegative Matrix Factorization

A new method without complex parameter estimate and independent reference source signal was proposed to remove power line interference. The theory of nonnegative matrix factorization (NMF) and the evaluating criteria of similar coefficients and signal to interference ratio (SIR) were used to remove power line interference. Meanwhile, by employing the principle of blind source separation (BSS) and the improved algorithm of multilayer NMF into synthesized and real-life data, our method produces satisfying and acceptable performance which is hard to be achieved by conventional filtering methods.