Both in nature and engineered systems, many signals are modulated onto carriers. This provides some immunity to baseline noise and DC level shifts. We see many of these modulated signals in various position and velocity sensors (as well as others). Unfortunately, most control engineers are not taught enough about how to efficiently demodulate these signals so as to minimize the noise, nonlinearities, and time delay in the extracted information. This topic covers some of the ways in which control engineers can use coherent demodulation to minimize these negative effects on the returned signal.
This topic includes the following resources and journeys:
Video talk of the paper by the same name.See More
This paper is a brief tutorial on methods for using modulated signals in feedback loops, and especially of the different methods and trade offs used for demodulating those signals to get...See More
This journey documents some of my path towards a more practical understanding of feedback control systems. Along the way, I have learned a lot and wish to share this with others.See More