论文部分内容阅读
本文讨论了用多分辨率分析(MRA)方法构造具有良好频率特性的带限正交(FLO)小波。并根据小波系数的能量在不同分辨率下的分布,定义了一种能够反映ORS综合波频率成分分布的特征参数λ。通过对MIT心律失常数据厍中波形的测试,结果显示室性QRS波的λ值通常小于正常的QRS波。并且该参数,特别是采用FLO小波计算时,能够明显区分正常和室性心搏,并有较强的抗干扰能力。
This paper discusses the construction of a band limited orthogonal (FLO) wavelet with good frequency characteristics using the Multi-resolution Analysis (MRA) method. According to the distribution of the energy of wavelet coefficients at different resolutions, a characteristic parameter λ that can reflect the distribution of frequency components of ORS is defined. Through the MIT arrhythmia data in the waveform test, the results show that the ventricular QRS wave λ value is usually smaller than the normal QRS wave. And this parameter, especially when using FLO wavelet calculation, can obviously distinguish between normal and ventricular heartbeat and has strong anti-interference ability.