Adaptive noise canceller for magnetocardiography

摘要

This paper discusses the use of adaptive noise cancellation in magnetocardiography system within unshielded environment using three algorithms: Least-Mean Squared (LMS) algorithm; normalized LMS (nLMS) algorithm and Genetic Algorithms (GA). Simulation results show that for low signal-to-noise ratio (SNR) values, the GA algorithm outperforms the other algorithms, displaying an improvement in SNR of 51.155dB and completely suppressing the noise sources at 60Hz and at low frequencies. However, the convergence time of the GA algorithm is longer due to the high computational complexity.