Application of least square curve fitting in bio-impedance model parameters extraction
Qin Zi-hui · China Measurement & Test · 2009
The least square curve fitting approach was adapted to extract the parameters of the bio-impedance model.The algorithm is characterized by its explicit formulas,quick calculation,and high precision.The parameters of impedance model,such as Re,Ri,Cm and α,can be extracted rapidly and accurately by this algorithm.So the algorithm is very important and useful in the application or development of virtual instrument for bio-impedance measurement.The experiment results of a RC model shows that the program based on this algorithm can extract the parameters of bio-impedance with quick calculation and high precision.