Research on a fetal electrocardiogram separation system based on DSP

In this paper, the research and implementation of a fetal electrocardiogram (FECG) separation system were introduced with the low-power DSP TMS320VC5509A as the core. To detect the fetal signal, a practical amplification and filter circuit was designed, then a DSP program was used to sample the signal, save the data and communicate with PC, and extract the FECG signal according to the nonlinear PCA algorithm. In this system design, it is the key to design an effective fetal signal detection circuit and a real-time sampling and data interface circuit. To validate these circuits, a real FECG dataset was sampled. The experimental results show that the system designs reasonably and portably, and performs excellently.