This tool looks very useful. But do I understand correctly that it will not fit systems with more than one output variable? If so, does anyone know of a tool that does polynomial fitting for systems with more than one output variable?
Thank you very much for this simple PLL implementation. However, I noticed it uses both the real and imaginary parts of the Signal. In a physical implementation we only have access to the real part of the signal, right? So how can this be applied to a real, physical signal?