TRANSFER FUNCTION ESTIMATION TOOLBOX

- ALERT !!!! This project is now archived. 
- For better results & functionalities use RIFF: Robust IIR Fitting & Filtering
- https://github.com/Nikhil-Mukund/RIFF 

MATLAB app to estimate noisy Transfer Functions. Requires MATLAB R2016b or above

Developed by: Nikhil Mukund Menon (nikhil@iucaa.in, nikhil.mukund@LIGO.ORG)

Based on MATLAB's Rationalfit and Tfest functions

             (Ref: https://in.mathworks.com/help/rf/ug/rationalfit.html)

             (Ref: https://in.mathworks.com/help/ident/ref/tfest.html)

To Run App

Open Matlab (Recommended Version: R2018b)

Go to TFestimate folder

Run TFestimate_App_v1.mlapp

Add new TF measurements by clicking the 'Add new file' button

Click either Rationalfit or Tfest

See & modify generated IIR filters in 'Filter' Section

Try modifying default parameters to obtain better fits

Add TF measurement data to measured_TFs subfolder.

The following formats are accepted :

1. [Freq real_TF imag_TF]
2. [Freq complex_TF]
3. [Freq Mag Phs(in radian) ]
4. FRD Model

Weighting Filter

Use either of 'Inverse' or 'Inverse Square Root' to capture low magnitude dynamics