基于专用FFT芯片的ECG信号节点滤波

Solution for ECG Signal Processing based on a Dedicated FFT Circuit

50/60赫兹电源线引起的电磁干是生理测量中的一个主要问题。使用嵌入式的常规方法即费时又需要大量的计算。在本文中,我们开发了一个基于硬件加速的数字滤波器。与ASIC编入一个可重构的快速傅立叶变换(FFT)的单位,有版权的ARM7TDMI IP hardcore和几个外围IP模块的设计实施。与其他方法相比,这种设计实现了在低频率范围,适合生理信号以及精确的结果。我们的方法明显比传统方法快。仿真和应用结果验证了该方法的准确性和效率。

Electromagnetic Interference induced by 50/60 Hz power line is a major problem in physiological measurements. Conventional methods using embedded software are time-consuming and require a great amount of calculations. In this paper we present a digital filter based on hardware acceleration. The design was based on ASIC that incorporated a reconfigurable Fast Fourier Transform (FFT) unit, a licensed ARM7TDMI IP hardcore and several peripheral IP blocks. Comparing with other methods, this design achieved satisfactory results in the low-frequency range, which is suitable for physiological signals acquisitions. Our method is remarkably faster than conventional methods. The simulation and experimental results confirmed the accuracy and efficiency of the proposed method.