ESTIMATION OF IMPEDANCE
using CWT with complex Morlet mother wavelet

The zip file includes:
dataset files: meas_prbs__low.mat, meas_prbs__med.mat and meas_prbs_high.mat
Matlab script files: compute_impedance.m and fc_impedance_cwtft.m
BibTeX file: debenjak_jps2014.bib

This collection of scripts and data is intended to show how the impedance
can be estimated based on the procedure proposed by Debenjak et el. (2014).
The paper focuses on the impedance of a PEM fuel cell, however, the exact 
procedure can be equally effective employed for any kind of electrochemical 
cell.

One should start with the compute_impedance.m script. When the script is 
executed, it estimates the impedance characteristic based on the data in 
the .mat files and produces the corresponding plots. The actual CWT signal 
processing algorithm is implemented as a Matlab function in the 
fc_impedance_cwtft.m script. 

The dataset files (.mat) include laboratory measurements of a Li-S battery
cell. However, the scripts can be used to estimate impedance of any kind 
of cell.

The employed impedance estimation algorithm is thoroughly presented in the
following journal publication (BibTex citation in debenjak_jps2014.bib):
A. Debenjak, P. Boskoski, B. Musizza, J. Petrovcic, D. Juricic. Fast
measurement of proton exchange membrane fuel cell impedance based on 
pseudo-random binary sequence perturbation signals and continuous
wavelet transform. Journal of Power Sources (254), pp. 112-118, 2014. 

The publication can be retrieved from the publisher's web cite:
http://www.sciencedirect.com/science/article/pii/S0378775313020831
or from the authors' web page (preprint):
http://dsc.ijs.si/en/files/274/

Please feel free to contact me at andrej.debenjak@ijs.si, if you have any
further questions.
