A reconfigurable overlapping FFT/IFFT filter for ECG signal de-noising

Abstract

Dynamic Electrocardiograph (ECG) monitoring (known as Holter) plays an important role in the earlier detection and diagnosis of various cardiovascular diseases. ECG signals obtained from Holter systems normally contain a lot of noises and artifacts. These noises degrade signal quality, which may be critical for routine monitoring and diagnosis. To solve the problem, a reconfigurable overlapping fast Fourier transform/ inverse fast Fourier transform (FFT/IFFT) filter for suppressing the power-line interference and the high-frequency noise is presented in this paper. The filter is based on a 12-lead Holter system with a high-performance analogue front-end and a field-programmable gate array (FPGA) for enhanced digital processing. This paper analyzes the performance of the reconfigurable overlapping FFT/IFFT filter in ECG de-noising applications and validate it by real-world emulations. Furthermore, the de-noising performance of the reconfigurable overlapping FFT filter was evaluated.