Let say a periodic signal waveform $v(t)$ can be modeled as:
$v(t) = f(\phi) A \sin(2\pi ft + \psi)$
where $A$ is a constant amplitude, $f$ is signal frequency, $t$ is time and $\psi$ is a constant phase.
While $f(\phi)$ is $f = k \cos(\phi)$, where $k$ is a constant and $\phi$ is a function of time $t$.
Now the signal $v(t)$ is corrected by removing the dependency to $ \phi$ factor i.e. $v'(t) = v(t)/f(\phi)$.
My question: is the process getting $v'(t)$ from $v(t)$ considered signal waveform demodulation ? or undistortion ?
The generic term I can think safely would be signal waveform correction but it would be better if there is a precise terminology.