动态心电信号干扰的识别研究

Research on Recognizing the Interference of Dynamic ECG Signal

目的研究能够有效滤除动态心电信号各种噪声和干扰,使有效信号得以突出的算法。方法分析动态心电信号干扰的形态特点及统计特点,针对不同种类的干扰提出识别办法,估算信噪比。结果本算法能有效估计信噪比的大小,有助于在心电监护中抛弃计算错误的导联,减小有效信号值估的偏差。结论本文算法具有较强的抗干扰能力,可靠性高,使监护系统能够有效地利用多导联的信息得到准确的分析诊断结果。

Objective To develop an algorithm in order to filter various noise and interference effectively and to make the available signal stand out. Methods Analyzed the morphological and statistical characteristic of interference of dynamic ECG signal, and proposed recognition methods for different types of interference and estimate the SNR. Results The algorithm can estimate the value of SNR effectively and help to throw away leads which give wrong value and decrease the bias in estimating the value of effective signal. Conclusion The algorithm has strong ability of anti-jamming, high reliability, and can contribute to obtain accurate result of analysis and diagnosis by employing the information of multi-lead effectively in monitoring systems.