【摘要】 研究了基于非线性时间序列的状态空间投影算法提取胎儿心电信号。母亲、胎儿心电信号以及噪声在状态空间中的吸引子表现形式不同,通过选择不同的邻域半径,将混合信号在某一局部范围内投影,就可以分离出所要监测的胎儿心电信号。对模拟的和实际测量的孕妇腹部混合信号仿真,都得到了较好的效果。相对于其它胎儿心电信号提取算法,该方法只需要一路导联信号就可以分离出胎儿心电信号,方便了医生对胎儿的监测。该算法对其它微弱特征信号提取具有借鉴作用。更多还原

【Abstract】 An algorithm of nonlinear state space projection to extract fetal electrocardiography(FECG) was proposed.In the state space,the attractor of mother ECG(MECG),FECG and noise are all different.Thus,local projection technique can be used to extract FECG by choosing different neighbourhood.Good results have been achieved on both simulated signal and actual mixture signal.Compared to other methods,the algorithm only needs one single recording.It simplifies fetal monitoring for the doctor.The technique can also be used to other weak signature detection.更多还原