# Tag Info

In a first analysis, it does not matter where the phase shifting is inserted, as long as the mixing stage is linear. Indeed, shifting a temporal signal is equivalent to multiplying it with a complex number integration the phase shift $\theta$ : Unshifted signal : $s(t)$ $\theta$ phase shifted signal : $s'(t) = s(t).e^{j\theta}$ $f_0$ carrier mixed ...