The experiment results show that this algorithm is easy to operate, and can realize the efficient extraction of respiration signal and the correction of sleep-related breathing events.

The artery pressure, the respiratory wave and the electrocardiogram were obtained synchronously, and then a series of parameters were calculated and analyzed in computer.

Method The improvement of coherent averaging method of Reducing respiratory Interference was discussed, and evaluation-fitting respiratory wave and filter of Chebyshev's polynomial as presented.