I don’t have access to a signal processor in my design. However, I have to process multiple signals on a single (wireless) bus. The way they are distinguished is via frequency and phase offset. There are three separate frequencies that must be distinguished from each other.
I would like to perform a series of correlations but afraid that would quickly overload the processor (it also has to run an OS and numerous other tasks). Is there a simpler method to distinguish several slow frequencies? The signals are all at around 10 Hz.