A New Application of Lock In Amplifier-Adaptive Noise Canceller

Author

Tong, Tangji ; Chen, Ying ; Tong, Jianjun ; Ning, Xinbao

Author_Institution

Inst. for Biomed. Eng., Nanjing Univ., Nanjing, China

fYear

2009

fDate

11-13 June 2009

Firstpage

1

Lastpage

4

Abstract

This paper introduced an algorithm to track and eliminate the power line interference. The model of the algorithm came from the lock-in-amplifier (LIA) hardware circuit. Inheriting the LIA ´s excellency of inhibiting the noise, this algorithm could precisely detect the amplitude, frequency and phase of the interference signal in the corrupted ECG. This algorithm, which does not need to avoid the QRS complex, could track and eliminate interference signals ranging from 48 Hz-52 Hz. We made two experiments to test the performance of the algorithm. The first test data came from MIT-BIH, which had been corrupted by artificial interference signals. The second test data was the actual ECG signal. Both the results proved to be satisfactory.

Keywords

bioelectric phenomena; electrocardiography; interference suppression; medical signal processing; ECG; MIT-BIH; adaptive noise canceller; artificial interference signals; lock in amplifier; power line interference elimination; Circuit noise; Electrocardiography; Hardware; Interference elimination; Noise cancellation; Noise level; Phase detection; Phase frequency detector; Phase noise; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Bioinformatics and Biomedical Engineering , 2009. ICBBE 2009. 3rd International Conference on

Conference_Location

Beijing

Print_ISBN

978-1-4244-2901-1

Electronic_ISBN

978-1-4244-2902-8

Type

conf

DOI

10.1109/ICBBE.2009.5162191

Filename

5162191