Interference Detection and Signal Quality Assessment of Pulse Signals

VernacularTitle:脉搏信号的干扰段检测与质量评估
Author: Aihua ZHANG ¹ ; Fangyuan WEI ; Yongxin CHOU ; Xiaohua YANG
Author Information

1. 兰州理工大学电气工程与信息工程学院
Keywords: symbolic representation; DTW; interference detection; quality assessment
From: Chinese Journal of Medical Instrumentation 2015;(4):235-239
CountryChina
Language:Chinese
Abstract: Pulse signal contains a wealth of biological and pathological information. However, it is susceptible to the influence of various factors which results in poor signal quality, and causes the device to generate false alarms. First the pulse signals are processing into discrete symbols, and then compare the test signal with the pulse template by using Dynamic Time Warping (DTW) to get the threshold for which can be used to find the interference segment of the test signal. By analyzing the DTW distance of the pulse signal, we can get the interference degree of the signal, then the quality level of the plus signal can be defined by the relationship between the interference degree and quality of the signal. The 1 055 group pulse signals provided by MIMICⅡphysiological database are used to train and test the signal quality assessment algorithms, and compared with other existing algorithms. The results show that the algorithms can accurately detect interference segments in pulse signal and reflect the quality of it.