Application of kalman filters as a tool for phase and frequency demodulation of IQ signals
Frank L. Schadt, Friedemann Mohr, Markus Holzer · 2008
Frequency or phase modulated electrical signals arise in multiple applications in communication systems as well as in measurement setups such as interferometry / vibrometry, velocimetry etc. common demodulation techniques are often based on analog techniques (e.g. a PLL in the RF band) or - after mixing into the base band and generating IQ signals - on digital signal processing algorithms.