Methods The noise paramete r was constructed by using light beat in the pulse oximetry system and the LMS(Lea st Mean Square) adaptive filter was used to eliminate the effect of motion artif act.

• 方法通过脉搏血氧仪中的双光束构造噪声参考信号，利用最小均方自适应滤波法消除运动伪差干扰的影响。