How to separate signals from a measured spectrum ?

[manasiri]

signal extraction

Dear explorers,

How I can separate two signal spectrum from a measured spectrum in spectrum analyzer?
the data of measuered spectrum are available. one signal is a square wave and another is an image signal that added to the square wave (in time domaine).

 

[vadkudr]

signal extraction

I think that for this separation task Kalman filter can be applied (in time domain).

Added after 23 minutes:

The most suited is Switching Kalman Filter

see
Murphy, KP (1998). Switching Kalman Filter. Technical Report 98-10,. Compaq Cambridge Research Laboratory
(find link in internet by yourself)

http://donoghue.neuro.brown.edu/pubs/wuEMBS03.pdf
Here is basic algorithm without theory.