Harmonic analysis method of human pulse signal

Harmonic analysis, i.e., using the lower-order harmonic component (lower than the ten) as parameters to approximate the original pulse signal, is presented. By comparing various diagrams of harmonic components and calculating correlations and variance of coefficients, it is found that these approximating waves closely coincide with the original waves. Thus by setting up a mathematical model analogous to a pulse signal, it would be possible to study pulse signal characteristics with a much smaller number of parameters.<>